CN209892284U

CN209892284U - Valve bridge and engine

Info

Publication number: CN209892284U
Application number: CN201920427492.0U
Authority: CN
Inventors: 李国文; 乔芳; 周辉浩
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2020-01-03
Anticipated expiration: 2029-03-29

Abstract

The valve bridge in this scheme, including valve bridge head, valve bridge pole portion and valve bridge pipe, valve bridge pipe one end is installed on the cylinder head, and other end suit is in valve bridge pole portion, and engine during operation, valve bridge pole portion axial displacement in the spacing range of counter bore has played fine axial direction and limiting displacement. The valve bridge is simple in structure, simple and fast to assemble with engine parts, capable of achieving axial guiding and limiting, free of adding an additional limiting structure on parts assembled with the valve bridge, and capable of reducing manufacturing difficulty requirements and assembly requirements of the valve bridge and the parts. This scheme still provides an engine that has above-mentioned valve bridge.

Description

Valve bridge and engine

Technical Field

The utility model belongs to the technical field of the engine, in particular to valve bridge and engine.

Background

At present, the location of valve bridge generally can carry out the axial spacingly through trompil and the cooperation of valve stem at valve bridge body both ends, simultaneously, prevents that the valve bridge from rotatory.

For the existing structure, the limit structure of the valve bridge increases the limit function on other parts, so that the manufacturing difficulty and the assembly requirement of the parts are improved.

Therefore, how to provide a valve bridge with simple structure and good assembly and manufacturing manufacturability is a problem to be solved urgently by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a valve bridge, simple structure, assembly, manufacturing process nature are good. Another object of the present invention is to provide an engine having the above valve bridge.

In order to solve the technical problem, the utility model provides a valve bridge, including valve bridge head, valve bridge pole portion and valve bridge pipe, the counter bore has been seted up to the one end and the cylinder head connection and the other end of valve bridge pipe, the one end of valve bridge pole portion with the bottom surface fixed connection and the other end activity of valve bridge head set up in the counter bore.

Preferably, in the above valve bridge, the valve bridge guide is detachably attached to the cylinder head.

Preferably, in the above valve bridge, the valve bridge guide pipe is provided with an external thread at a connection end with the cylinder head, and the cylinder head is provided with an internal thread hole in threaded fit with the valve bridge guide pipe.

Preferably, in the above valve bridge, one end of the head of the valve bridge is provided with a U-shaped groove for sleeving the top end of the first valve stem.

Preferably, in the above valve bridge, the tip end of the valve stem has a clearance in the U-shaped groove along the length of the valve bridge head.

Preferably, in the above valve bridge, an internal thread through hole is formed at the other end of the head portion of the valve bridge, an adjusting screw is provided on the internal thread through hole, and the bottom end of the adjusting screw is used for abutting against the top end of the second valve stem.

Preferably, in the above valve bridge, a weight reduction groove is further formed in the head portion of the valve bridge.

The present solution also provides an engine comprising a valve bridge as described hereinabove.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural view of a valve bridge body provided by the scheme;

FIG. 2 is an assembly view of the valve bridge body and valve bridge guide provided by the present solution.

In the upper diagram:

1. the valve bridge comprises a valve bridge head part, 101U-shaped grooves, 102 adjusting screws, 2 valve bridge rod parts, 3 valve bridge guide pipes.

Detailed Description

The core of the utility model is to provide a valve bridge, simple structure, assembly, manufacturing process are good. Another object of the present invention is to provide an engine having the above valve bridge.

In order to make those skilled in the art better understand the technical solution provided by the present invention, the technical solution in the embodiments of the present invention will be removed 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 some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, fig. 1 is a schematic structural view of a valve bridge body according to the present disclosure; FIG. 2 is an assembly view of the valve bridge body and valve bridge guide provided by the present solution.

The utility model provides a valve bridge, including valve bridge head 1, valve bridge pole portion 2 and valve bridge pipe 3, wherein, the cylinder head is connected to the one end of valve bridge pipe 3, and the other end sets up the counter bore. One end of the valve bridge rod part 2 is fixedly connected with the bottom surface of the valve bridge head part 1, the other end of the valve bridge rod part is movably arranged in the counter bore, the counter bore on the valve bridge guide pipe 3 has a certain depth, and when an engine works, the valve rod makes up-and-down reciprocating motion and simultaneously drives the valve bridge rod part 2 to axially move in the limit range of the counter bore.

Valve bridge in this scheme, 3 one ends of valve bridge pipe are installed on the cylinder head, 3 other ends suit in valve bridge pole portion 2 of valve bridge pipe, the engine during operation, valve bridge pole portion axial displacement in the spacing range of counter bore, fine axial direction and limiting displacement have been played, above-mentioned valve bridge simple structure, simple swift with the assembly of engine spare part, need not to increase extra limit structure again from the spare part with the assembly of valve bridge, it requires to reduce to make the degree of difficulty requirement and the assembly of valve bridge and spare part.

In order to facilitate the disassembly, assembly and replacement of the valve bridge guide pipe 3, the valve bridge guide pipe 3 is detachably connected with the cylinder cover. Specifically, the valve bridge conduit 3 is provided with an external thread at the connecting end with the cylinder cover, and the cylinder cover is provided with an internal thread hole which is matched and connected with the external thread. Of course, the disassembling and assembling mode can be selected according to actual needs, such as clamping and the like, and is not particularly limited herein.

In order to limit the circumferential direction of the valve bridge, one end of the valve bridge head part 1 is provided with a U-shaped groove 101 which is used for sleeving the top end of the first valve rod. The opening of the U-shaped groove 101 is directed away from the center, i.e. the outer end surface, in the longitudinal direction of the valve bridge head 1. The bottom of U type groove 101 and valve stem top looks butt, the outer terminal surface in U type groove is the bottom surface and the last valve spring holder looks butt of valve bridge head portion 1 to reach the purpose of the one end of valve bridge head portion 1 and valve subassembly joint, accomplish spacingly.

The top end of the valve rod is provided with a movable clearance in the U-shaped groove 101 along the length direction of the valve bridge head part 1, and the design of the movable clearance can ensure that a reasonable movable space is kept between the U-shaped groove and the top end of the valve rod in the up-and-down movement process of the valve assembly, thereby reducing the abrasion to the inner side end of the U-shaped groove 101 in the movement process and further prolonging the service life of the valve bridge and the valve rod.

In the above embodiment, the other end of the valve bridge head 1 is provided with an internally threaded through hole, and the internally threaded through hole is provided with an adjusting screw 102, the bottom end of which abuts against the top end of the second valve stem. The height of the adjusting screw 102 on the internal thread through hole can be adjusted, and the height can be adjusted by matching with a nut, so that the top end of the valve rod is tightly pressed with the valve bridge head part 1, and the two ends of the valve bridge head part 1 are ensured to be parallel relative to the valve rod. As shown in the figure, the thickness of U type groove one end is greater than the thickness of internal thread through-hole one end on valve bridge head portion 1, and the length that adjusting screw 102 stretches out valve bridge head portion 1 bottom surface is adjusted, highly finely tunes valve bridge one end, until adjusting screw 102's bottom and valve stem top extrusion atress, reaches the purpose that valve stem head portion both ends are parallel and connect firmly promptly.

It should be explained that the first valve stem is a valve stem corresponding to one end of the U-shaped groove 101 where the valve bridge head portion 1 is located, and the second valve stem is a valve stem corresponding to one end of the internal threaded through hole where the valve bridge head portion 1 is located, and the first valve stem and the second valve stem are defined as first valve stem and second valve stem for distinguishing for convenience of distinguishing.

In order to reduce the weight, the valve bridge head part 1 is also provided with weight reduction grooves which are specifically arranged on two side surfaces of the valve bridge head part 1.

In addition, this application still provides an engine, including the valve bridge, and is specific, and this valve bridge is the valve bridge that discloses in above-mentioned embodiment, and consequently, the engine that has this valve bridge also has above-mentioned technological effect, and the no longer gives unnecessary details here.

In conclusion, the single guide pipe is arranged on the valve bridge, and the valve bridge rod part is matched for axial limiting; one end of the head part of the valve bridge is provided with a groove structure for circumferential limiting; the other end of the valve bridge head part is provided with an adjusting screw structure with adjustable height so as to ensure that the two ends are parallel; one end of the valve bridge conduit is designed with a thread structure, so that the conduit is convenient to disassemble and assemble. Above-mentioned design for the valve bridge of this scheme simple structure, assembly, manufacturing manufacturability are good, convenient maintenance. The method is applied to M26 ship products at present, can be popularized and has high reliability.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The valve bridge is characterized by comprising a valve bridge head (1), a valve bridge rod (2) and a valve bridge guide pipe (3), wherein one end of the valve bridge guide pipe (3) is connected with a cylinder cover, the other end of the valve bridge guide pipe is provided with a counter bore, one end of the valve bridge rod (2) is fixedly connected with the bottom surface of the valve bridge head (1), and the other end of the valve bridge rod is movably arranged in the counter bore.

2. The valve bridge according to claim 1, characterized in that the valve bridge guide tube (3) is detachably connected to the cylinder head.

3. The valve bridge according to claim 2, characterized in that the valve bridge guide tube (3) is provided with an external thread at the end connected to the cylinder head, which is provided with an internal threaded bore in threaded engagement with the valve bridge guide tube (3).

4. The valve bridge according to any one of claims 1 to 3, wherein one end of the valve bridge head (1) is provided with a U-shaped groove (101) for sleeving the top end of the first valve stem.

5. The valve bridge according to claim 4, characterized in that the valve stem tip has a play in the U-shaped groove (101) along the length of the valve bridge head (1).

6. The valve bridge according to claim 4, characterized in that the other end of the valve bridge head (1) is provided with an internally threaded through hole, an adjusting screw (102) is arranged on the internally threaded through hole, and the bottom end of the adjusting screw is used for abutting against the top end of the second valve stem.

7. The valve bridge according to claim 1, characterized in that the valve bridge head (1) is provided with weight-reducing grooves.

8. An engine comprising a valve bridge according to any one of claims 1 to 7.