CN207660657U - A kind of valve axle assembly - Google Patents

Abstract

The present application discloses a valve bridge assembly, comprising: a valve bridge body, a mounting hole is opened on the bottom surface of the valve bridge body, and the opening edge of the mounting hole has a A deformed deformation part; an auxiliary piston disposed in the installation hole, the auxiliary piston includes a first piston section and a second piston section axially distributed, and the second piston section is arranged close to the opening of the installation hole, And the outer diameter of the second piston section is smaller than the outer diameter of the first piston section, and the axial length of the second piston section is not less than the stroke of the auxiliary piston. The valve bridge assembly provided by the utility model is provided with a deformation part on the valve bridge body, through the deformation of the deformation part, the position limitation of the auxiliary piston is realized. Compared with the existing method of position limitation through positioning pins, the valve bridge can The structure and processing technology of the assembly are simpler, and the manufacturing cost is also reduced.

Description

A valve bridge assembly

technical field

The utility model relates to the technical field of engines, in particular to a valve bridge assembly.

Background technique

The valve bridge assembly for engine braking, as shown in Figure 1, is equipped with a main piston 02 and a secondary piston 03 on the valve bridge 01 because the exhaust brake device is integrated, but since the secondary piston 03 is installed on the valve The bottom of the bridge 01 is installed from bottom to top, so in the process of transporting, installing and dismantling the valve bridge assembly, there will be a problem that the auxiliary piston 03 will fall off from the brake valve bridge 01.

In the prior art, the commonly used method to solve the above problems is to use positioning pins to limit the falling off of the auxiliary piston 03, that is, to process the positioning pin holes on the valve bridge 01, and to process the limit grooves on the auxiliary piston 03 at the same time, and then Then the positioning pin is welded on the valve bridge 01 to limit the position of the auxiliary piston 03. However, this method has the following disadvantages: additional limiting parts (ie, positioning pins) are used, resulting in a more complex structure and increased manufacturing costs; processing of positioning pin holes, positioning grooves, and welding operations are required, resulting in increased The operation is more complicated.

Utility model content

In view of this, the utility model provides a new type of valve bridge assembly. By improving the existing structure, the structure and processing technology of the valve bridge assembly are simpler, and the manufacturing cost is also reduced.

In order to achieve the above object, the utility model provides the following technical solutions:

A valve bridge assembly, comprising:

A valve bridge body, an installation hole is opened on the bottom surface of the valve bridge body, and the opening edge of the installation hole has a deformation part capable of plastic deformation in the axial direction of the installation hole;

A secondary piston arranged in the mounting hole, the secondary piston includes a first piston segment and a second piston segment axially distributed, the second piston segment is disposed close to the opening of the mounting hole, and the second The outer diameter of the piston section is smaller than the outer diameter of the first piston section, and the axial length of the second piston section is not less than the stroke of the auxiliary piston.

Preferably, in the above-mentioned valve bridge assembly, the edge of the opening surrounding the opening of the installation hole is a circular structure, and the deformation part is an arc-shaped part forming the circular structure.

Preferably, in the above-mentioned valve bridge assembly, the deformed portion is integrally formed with the valve bridge body.

Preferably, in the above-mentioned valve bridge assembly, the installation hole is arranged close to the first end of the valve bridge body, and the deformation part is the part of the circular structure with the smallest distance from the first end.

Preferably, in the above-mentioned valve bridge assembly, the deformed portion protrudes from the inner wall of the installation hole by a length not greater than the difference between the outer diameter of the second piston section and the outer diameter of the first piston section.

Preferably, in the above-mentioned valve bridge assembly, the difference between the outer diameter of the second piston section and the outer diameter of the first piston section is 0.5 mm to 1 mm.

The valve bridge assembly provided by the utility model is provided with a deformation part on the valve bridge body, through the deformation of the deformation part, the position limitation of the auxiliary piston is realized. Compared with the existing method of position limitation through positioning pins, the valve bridge can The structure and processing technology of the assembly are simpler, and the manufacturing cost is also reduced.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is the front sectional view of valve bridge assembly in the prior art;

Fig. 2 is the front sectional view of the auxiliary piston in the valve bridge assembly provided by the embodiment of the present invention;

Fig. 3 is the front sectional view of the valve bridge assembly provided by the embodiment of the utility model;

Fig. 4 is a bottom view of the valve bridge assembly provided by the embodiment of the present invention.

In Figure 1-Figure 4:

01-valve bridge, 02-main piston, 03-secondary piston;

1-Valve bridge body, 2-Installation hole, 3-Deformation part, 4-Auxiliary piston, 5-Main piston, 6-First end;

41 - the first piston section, 42 - the second piston section.

Detailed ways

The utility model provides a novel valve bridge assembly. By improving the existing structure, the structure and processing technology of the valve bridge assembly are simpler, and the manufacturing cost is also reduced.

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figures 2-4, the valve bridge assembly provided by the embodiment of the present invention includes a valve bridge body 1, a main piston 5 and a secondary piston 4. This application mainly carries out the structure of the valve bridge body 1 and the secondary piston 4. Improvement is made, that is: the bottom surface of the valve bridge body 1 is provided with a mounting hole 2, and the opening edge of the mounting hole 2 has a deformation part 3 that can be plastically deformed toward the axial direction of the mounting hole 2 (or the inner side of the mounting hole 2) The secondary piston 4 is arranged in the mounting hole 2, and the secondary piston 4 includes a first piston segment 41 and a second piston segment 42 axially distributed, and this second piston segment 42 is arranged near the opening of the mounting hole 2, and the second piston The outer diameter of the section 42 is smaller than the outer diameter of the first piston section 41, and the axial length of the second piston section 42 is not less than the stroke of the secondary piston 4 (this stroke refers to the unidirectional movement of the secondary piston 4 in the mounting hole 2). Maximum distance), that is, after the structure of the valve bridge body 1 and the auxiliary piston 4 is changed, it is necessary to ensure that the normal movement of the auxiliary piston 4 will not be affected.

For the valve bridge assembly with the above structure, after the auxiliary piston 4 is installed in the installation hole 2, since the opening edge of the installation hole 2 has a deformed part 3, the deformed part 3 is knocked to make it move toward the axis of the installation hole 2. The plastic deformation can limit the position of the auxiliary piston 4 so that the auxiliary piston 4 will not completely fall out of the installation hole 2 under the blocking of the deformation part 3 .

In order to further optimize the technical solution, in the valve bridge assembly provided in this embodiment, the opening edge surrounding the opening of the installation hole 2 is preferably a circular structure, and the deformation part 3 is an arc-shaped part forming a circular structure, as shown in Figure 4 . In this embodiment, the opening edge is preferably a circular structure, that is, the opening of the mounting hole 2 is a circular opening, and the deformation part 3 is preferably an integral part of the opening edge, so that there is no need to set other stoppers on the valve bridge body 1 The structure makes the structure of the valve bridge assembly provided by this embodiment simpler. In addition, under the premise of not affecting the work of other components, the deformed part 3 can also be a bump arranged on the bottom surface of the valve bridge body 1, and the bump can be deformed by knocking on the bump to extend into the mounting hole 2, and it can also be Realized the limit to auxiliary piston 4.

In addition, it is also preferable that the deformation part 3 and the valve bridge body 1 are integrally formed, that is, the deformation part 3 and the valve bridge body 1 are made of the same material, and are plastically deformed by knocking. This arrangement facilitates the processing and molding of the valve bridge assembly provided in this embodiment, and the connection between the deformed part 3 and the valve bridge body 1 is more secure. In addition, the deformation part 3 may also be a component connected to the valve bridge body 1 and made of a different material from the valve bridge body 1 .

As shown in Figure 3, in this embodiment, the installation hole 2 is also preferably provided near the first end 6 of the valve bridge body 1, and the deformation part is the part of the circular structure with the smallest distance from the first end 6, that is to say, the deformation part 3 is the part closest to the first end among the parts forming the circular structure. The deformation part 3 is arranged close to the first end 6, because the deformation part 3 arranged near the first end 6 is easy to carry out the knocking operation, and under the premise of integral molding, the position of the valve bridge body 1 near the first end 6 After the deformation occurs, the impact on other parts of the valve bridge body 1 is relatively small.

Further, the length h of the deformed portion 3 protruding from the inner wall of the installation hole 2 is not greater than the difference between the outer diameter of the second piston segment 42 and the outer diameter of the first piston segment 41 . That is to say, after the deformation part 3 is knocked and deformed, the length of the part extending into the mounting hole 2 (or the part approaching the axis of the mounting hole 2) is preferably not greater than the outer diameter of the second piston section 42 The difference between the outer diameter of the first piston segment 41 and the deformation part 3 will not contact the second piston segment 42 after deformation, thereby ensuring the flexible movement of the auxiliary piston 4 .

More preferably, the difference d between the outer diameter of the second piston section 42 and the outer diameter of the first piston section 41 is 0.5mm-1mm. This numerical range is the preferred numerical range of this embodiment, which can better meet the working requirements of the valve bridge assembly provided by this embodiment. In addition, on the premise of ensuring the normal operation of the valve bridge assembly, the difference between the outer diameter of the second piston section 42 and the outer diameter of the first piston section 41 can also be in other numerical ranges, which is not discussed in this embodiment. Do limited.

In this manual, the structure of each part is described in a progressive manner. The structure of each part focuses on the difference from the existing structure. The overall and partial structure of the valve bridge assembly can be achieved by combining the above multiple parts obtained by the structure.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A valve bridge assembly, characterized in that, comprising: A valve bridge body, an installation hole is opened on the bottom surface of the valve bridge body, and the opening edge of the installation hole has a deformation part capable of plastic deformation in the axial direction of the installation hole; A secondary piston arranged in the mounting hole, the secondary piston includes a first piston segment and a second piston segment axially distributed, the second piston segment is disposed close to the opening of the mounting hole, and the second The outer diameter of the piston section is smaller than the outer diameter of the first piston section, and the axial length of the second piston section is not less than the stroke of the auxiliary piston. 2. The valve bridge assembly according to claim 1, wherein the edge of the opening surrounding the opening of the installation hole is a circular structure, and the deformed part is an arc part forming the circular structure . 3 . The valve bridge assembly according to claim 2 , wherein the deformed part is integrally formed with the valve bridge body. 4 . 4. The valve bridge assembly according to claim 2, characterized in that, the installation hole is set close to the first end of the valve bridge body, and the deformation part is the circular structure and the first end The part with the smallest end distance. 5. The valve bridge assembly according to any one of claims 1-4, characterized in that, the length of the deformed part protruding from the inner wall of the mounting hole is not greater than the outer diameter of the second piston section. The difference between the diameter and the outer diameter of the first piston section. 6 . The valve bridge assembly according to claim 5 , wherein the difference between the outer diameter of the second piston section and the outer diameter of the first piston section is 0.5 mm to 1 mm.