CN216811812U

CN216811812U - Valve bridge assembly, valve device and engine

Info

Publication number: CN216811812U
Application number: CN202123438962.XU
Authority: CN
Inventors: 马文娟; 王润; 庞瑞江
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-24
Anticipated expiration: 2031-12-31

Abstract

The application relates to the technical field of engines, and discloses a valve bridge subassembly, valve gear and engine, valve bridge subassembly include valve bridge body, valve guide and guide post, wherein: the guide post is connected to one side of the valve bridge body, which faces the cylinder cover, and the axial direction of the guide post is the same as that of the valve bridge body; one end fixed connection of valve guide is in the cylinder head, and the guide post surface is located to the valve guide cover, and the valve guide includes the guide part and prevents changeing the portion, and the guide post can move along self axis direction relative to the guide part, prevents changeing the portion and can be used to restrict the guide post along circumferential direction. The utility model discloses valve bridge subassembly can be used to solve for preventing that the guide structure rotation leads to the problem that spare part quantity increases, cost increase.

Description

Valve bridge assembly, valve device and engine

Technical Field

The application relates to the technical field of engines, in particular to a valve bridge assembly, a valve device and an engine.

Background

In order to solve the problem of eccentric wear of the valve guide, a guide structure is generally required to be added on the valve bridge, so that the influence caused when two valves are out of synchronization is avoided. However, when the guide structure is provided, it is necessary to restrict the degree of freedom of rotation of the guide structure so as to prevent the valve bridge from rotating. At present, in order to prevent the rotation of the guide structure, a guide pin is generally added, and the guide pin is used for preventing the rotation, however, the number of parts is increased when the guide pin is added, so that the cost is increased.

SUMMERY OF THE UTILITY MODEL

The application provides a valve bridge subassembly, valve gear and engine can be used to solve for preventing that the guide structure rotation leads to the problem that spare part quantity increases, cost increase.

In a first aspect, the present application provides a valve bridge assembly comprising a valve bridge body, a valve guide and a guide post, wherein:

the guide post is connected to one side, facing the cylinder cover, of the valve bridge body, and the axial direction of the guide post is the same as that of the valve bridge body;

one end of the valve guide pipe is fixedly connected to the cylinder cover, the valve guide pipe is sleeved on the surface of the guide post, the valve guide pipe comprises a guide part and an anti-rotation part, the guide post can move along the axis direction of the guide post relative to the guide part, and the anti-rotation part can be used for limiting the guide post to rotate along the circumferential direction.

The valve bridge subassembly in this application is provided with the guide post on the valve bridge body to improve through the structure to the valve pipe, make the valve pipe include the guide part and prevent changeing the portion, the guide part is used for restricting the guide post and removes along the linear direction, also restricts the valve bridge body and removes along self axis direction, prevents changeing the circumferential motion that the portion is used for restricting the guide post, also prevents that the guide post from rotating. Above-mentioned valve bridge subassembly improves through the structure to the valve pipe for the valve pipe has the direction concurrently and prevents changeing the function, need not set up the uide pin in addition, thereby reducible spare part's quantity, and reduce cost.

Therefore, the valve bridge assembly provided by the application can solve the problems of increased number of parts and increased cost caused by the rotation of the guide post.

Preferably, the rotation preventing portion is located on one side, facing the valve bridge body, of the guide portion, and comprises two rotation preventing planes which are oppositely arranged, and the rotation preventing planes are in friction contact with the guide columns.

Preferably, along the circumference of the guide post, the guide post comprises a cylindrical surface and a friction plane, and the friction plane is arranged corresponding to the anti-rotation plane, so that the anti-rotation plane is in friction contact with the friction plane.

Preferably, an air channel is arranged inside the guide column, the air channel penetrates through the guide column along the axial direction of the guide column, and the air channel is communicated with the valve bridge body.

Preferably, one end of the valve guide facing the cylinder head is provided with a positioning groove, the positioning groove is arranged along the circumferential direction of the valve guide, and the valve guide is fixed on the cylinder head through the positioning groove.

In a second aspect, the present application provides a valve device, including a valve bridge assembly and two valves as described in any one of the above, two valves are respectively installed at two ends of the valve bridge body, and the axial direction of the valve is the same as the axial direction of the guide post.

In a third aspect, the application provides an engine comprising a cylinder and a valve device as described above, wherein the cylinder comprises a cylinder cover, and one end of the valve far away from the valve bridge body penetrates through the cylinder cover and extends into the cylinder.

Drawings

FIG. 1 is a schematic illustration of a valve bridge assembly according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a valve guide according to an embodiment of the present application;

FIG. 3 is a schematic view showing a structure of a valve gear in the embodiment of the present application;

FIG. 4 is a schematic view of a structure of a guide post according to an embodiment of the present application;

FIG. 5 is a cross-sectional view of a valve bridge assembly according to the embodiments of the subject application.

In the figure:

10-valve bridge body; 20-a guide post; 21-a cylindrical surface; 22-friction plane; 23-airway; 30-a valve guide; 31-a guide; 32-a rotation prevention part; 321-rotation prevention plane; 33-positioning grooves; 40-a cylinder head; 50-valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, embodiments of the present application may provide a valve bridge assembly including a valve bridge body 10, a valve guide 30, and a guide post 20. Wherein, the guide post 20 can be connected to one side of the valve bridge body 10 facing the cylinder head 40, and the axial direction of the guide post 20 is consistent with the axial direction of the valve bridge body 10, it can also be understood that the guide post 20 is arranged perpendicular to the valve bridge body 10. One end of the valve guide 30 is fixedly connected to the cylinder head 40, and the guide post 20 can extend into the valve guide 30 through the other end of the valve guide 30, that is, the valve guide 30 is sleeved on the surface of the guide post 20. The valve guide 30 may include a guide portion 31 and an anti-rotation portion 32, the guide post 20 may move in the direction of its own axis relative to the guide portion 31, and the anti-rotation portion 32 may be used to rotate the guide post 20 in the circumferential direction.

Above-mentioned valve bridge assembly, the last guide post 20 that is provided with of valve bridge body 10 to improve through the structure to valve guide 30, make valve guide 30 include guiding portion 31 and anti-rotation part 32, guiding portion 31 is used for restricting guide post 20 and moves along the rectilinear direction, also restricts valve bridge body 10 and moves along self axis direction promptly, and anti-rotation part 32 is used for restricting the circumferential direction of guide post 20, also prevents that guide post 20 from rotating promptly. Above-mentioned valve bridge subassembly improves through the structure to valve guide 30 for valve guide 30 has the direction concurrently and prevents changeing the function, need not set up the uide pin in addition, thereby reducible spare part's quantity, and reduce cost.

In some embodiments, as shown in fig. 2, the guiding portion 31 may be cylindrical and have a channel therein for the guiding stud 20 to extend into, and the guiding stud 20 may be in clearance fit with the guiding portion 31. The rotation prevention portion 32 may be disposed at an end of the valve guide 30, that is, on a side of the guide portion 31 facing the valve bridge body 10, the rotation prevention portion 32 may include two rotation prevention planes 321 that are disposed opposite to each other, and a distance between the two rotation prevention planes 321 may be smaller than a diameter of a channel in the guide portion 31, so that the rotation prevention planes 321 can make frictional contact with the guide post 20, thereby preventing the guide post 20 from rotating.

In addition, as shown in fig. 1, due to the anti-rotation plane 321, the valve guide 30 forms an additional oil storage space between the guide portion 31 and the anti-rotation portion 32, so that the amount of lubricating oil between the valve guide 30 and the guide post 20 can be increased to a certain extent, and the risk of jamming of the guide post 20 can be reduced.

In some embodiments, referring to fig. 4, along the circumference of the guiding column 20, the guiding column 20 may include a cylindrical surface 21 and a friction plane 22, the friction plane 22 may be disposed corresponding to the rotation-preventing plane 321, that is, the guiding column 20 is provided with two friction planes 22, and the two friction planes 22 may be respectively disposed opposite to the rotation-preventing planes 321, so that the friction area between the two friction planes is increased, and the rotation of the guiding column 20 is better restricted.

In some embodiments, referring to fig. 5, the guide post 20 may be provided with an air passage 23 inside, the air passage 23 may extend along the axial direction of the guide post 20 and extend through the guide post 20, that is, one end of the air passage 23 may be communicated with a passage in the valve guide 30, and the other end may be communicated with the valve bridge body 10, the air passage 23 may be used for air flow, so that when the valve bridge body 10 moves, air may pass through the valve guide 30 and the air passage 23 from the cylinder head 40 to the valve bridge body 10, and finally flow out from the valve bridge body 10, so as to form a flow passage of air, thereby facilitating the valve bridge to reduce resistance when moving.

In some embodiments, the end of the valve guide 30 facing the cylinder head 40 may further be provided with a positioning groove 33, and the positioning groove 33 may be provided along the circumference of the valve guide 30, so that the valve guide 30 may be fixedly connected to the cylinder head 40 through the positioning groove 33, and the valve guide 30 may not fall into the cylinder head 40.

Based on the same inventive concept, referring to fig. 3, an embodiment of the present application may provide a valve device, including the valve bridge assembly and two valves 50 as in any of the above embodiments, where the two valves 50 may be respectively connected to two ends of the valve bridge body 10, and an axial direction of the valve 50 may be the same as an axial direction of the guide post 20, and the valve bridge body 10 may drive the two valves 50 to move synchronously when moving.

Based on the same inventive concept, the embodiment of the present application may further provide an engine, which includes a cylinder and the above valve device, where the cylinder includes a cylinder cover 40, and one end of each of the two valves, which is far away from the valve bridge body 10, may extend into the cylinder after passing through the cylinder cover 40.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A valve bridge assembly comprising a valve bridge body, a valve guide and a guide post, wherein:

2. The valve bridge assembly of claim 1 wherein the anti-rotation portion is located on a side of the guide portion facing the valve bridge body, the anti-rotation portion including two oppositely disposed anti-rotation planes in frictional contact with the guide post.

3. The valve bridge assembly of claim 2 wherein the guide post includes a cylindrical surface and a friction surface along a circumferential direction of the guide post, the friction surface being disposed in correspondence with the anti-rotation surface such that the anti-rotation surface is in frictional contact with the friction surface.

4. The valve bridge assembly of claim 1 wherein the guide post has an air passage defined therein that extends through the guide post in the axial direction of the guide post and communicates with the valve bridge body.

5. A valve bridge assembly according to claim 1 in which the end of the valve guide facing the cylinder head is provided with a locating groove arranged circumferentially of the valve guide through which the valve guide is secured to the cylinder head.

6. A valve device, comprising a valve bridge assembly according to any one of claims 1 to 5 and two valves, wherein the two valves are respectively mounted at both ends of the valve bridge body, and the axial directions of the valves are the same as the axial direction of the guide post.

7. An engine comprising a cylinder including a cylinder head and a valve arrangement according to claim 6, the end of the valve remote from the valve bridge body projecting through the cylinder head into the cylinder.