CN210948826U

CN210948826U - Hollow valve bridge guide rod

Info

Publication number: CN210948826U
Application number: CN201921014343.8U
Authority: CN
Inventors: 张振坤; 吴定勇; 苏怀林
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-07-07
Anticipated expiration: 2029-07-02

Abstract

The utility model provides a valve bridge guide bar of cavity formula, include: one end of the guide rod is connected with the valve bridge in a sliding mode, the other end of the guide rod is connected with the cylinder cover in a sliding mode, and a center hole is formed in the axis direction of the guide rod; the hollow valve bridge guide rod provided by the utility model has the advantages that due to the existence of the center hole, the air in the mounting hole can be smoothly discharged, and the occurrence of compressed air is avoided; meanwhile, the shrinkage of the bottom is increased, the press fitting is convenient, and the weight of the guide rod is reduced.

Description

Hollow valve bridge guide rod

Technical Field

The utility model belongs to the technical field of the cylinder cap cooling, concretely relates to valve bridge guide bar of cavity formula.

Background

At present, more and more valve bridge guide mechanisms are applied to engines. The valve bridge guide rod is used as an important component part in a guide mechanism and is increasingly applied. The valve bridge guide rod is generally of a cylindrical structure and is fixed on a cylinder cover datum plane. The valve bridge is guided in a certain fixed direction by the cylindrical surface contact. The installation tolerances of the valve bridge guide lever itself have a great influence on the guiding function. If the verticality deviation between the valve bridge guide rod and the guide reference surface is overlarge, the original guide function is lost, and the abnormal abrasion of the valve bridge is caused. When the valve bridge guide rod is installed on the blind hole, air in the installation hole cannot be removed, high-pressure compressed air is formed often, and the valve bridge guide rod is prevented from being pressed in. The valve bridge guide rod is pressed in batch by a machine. When the pressure of the internal compressed air is too high, the valve bridge guide rod is not pressed in place, and the top of the valve bridge guide rod can collide with the valve bridge. In addition, the verticality of the valve bridge guide rod can be influenced, and the deviation of the guide direction is caused.

The Chinese patent application with the publication number of CN108868938A discloses a valve bridge with increased guide fit length, wherein the valve bridge comprises a valve bridge guide rod and a valve bridge body, the valve bridge body is provided with a valve bridge guide hole, and the valve bridge guide hole is used for installing the valve bridge guide rod. The valve bridge is provided with the valve bridge inner reaming hole at the bottom of the valve bridge guide hole, so that the guide matching length is increased, the space is fully utilized, the oil storage space is increased, and lubrication is facilitated.

It can be seen that the valve bridge guide rod in the prior art mainly focuses on designing the inner reaming of the valve bridge at the bottom of the valve bridge guide hole to increase the guide matching length, but the air problem in the mounting hole cannot be eliminated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a valve bridge guide bar of cavity formula aims at solving the air problem in the mounting hole can't be got rid of to valve bridge guide bar among the prior art.

For realizing above-mentioned technical purpose, reach above-mentioned technological effect, the utility model discloses a following technical scheme realizes:

the utility model provides a well hollow type valve bridge guide bar, include: one end of the guide rod is connected with the valve bridge in a sliding mode, the other end of the guide rod is fixedly connected with the cylinder cover, and a center hole is formed in the axis direction of the guide rod.

Preferably, the wall thickness of the guide rod is greater than or equal to 4 mm.

Preferably, one end of the guide rod, which is connected with the cylinder head in a sliding manner, is further provided with a guide surface, and the guide surface is of a conical structure.

Preferably, the guide rod is connected with the cylinder cover in an interference fit mode.

The utility model has the advantages that:

1. the utility model provides a valve bridge guide bar of cavity formula because the existence of centre bore for the air in the mounting hole can be discharged smoothly, has avoided compressed air's appearance.

2. The utility model provides a valve bridge guide bar of cavity formula because the existence of centre bore, has increased the shrinkage of bottom, makes things convenient for the pressure equipment, has reduced the weight of guide bar.

3. The utility model provides a valve bridge guide bar of cavity formula, the wall thickness is greater than or equal to 4mm, can not cause the influence to the intensity of guide bar like this.

Drawings

Fig. 1 is a schematic view of the overall structure of a hollow valve bridge guide rod according to the present invention;

fig. 2 is a cross-sectional view of the hollow valve bridge guide rod of the present invention.

In the figure, 100 is a cylinder head, 101 is a valve bridge, 102 is a guide rod, 103 is a center hole, and 104 is a guide surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the present invention is further described in detail by the following embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The utility model provides a valve bridge guide bar of cavity formula, as shown in figure 1, figure 2, include:

a guide rod 102, one end of the guide rod 102 is slidably connected with the valve bridge 101, the other end of the guide rod 102 is fixedly connected with the cylinder head 100, and a central hole 103 (shown in fig. 2) is further formed in the axial direction of the guide rod 102; because the cylinder cover 100 is internally provided with structures such as an air passage, a water passage and the like, the mounting hole of the guide rod 102 is generally designed to be a blind hole, and air in the mounting hole on the cylinder cover 100 can be discharged along the central hole 103 when the guide rod 102 is pressed, so that the guide rod 102 can not be subjected to air resistance when being pressed, the press fitting can be smoothly carried out in place, and the press fitting precision is ensured.

In one embodiment, the wall thickness of the guide rod 102 is greater than or equal to 4mm, which does not affect the strength of the guide rod 102.

In some embodiments, the end of the guide rod 102 slidably connected to the cylinder head 100 is further provided with a guide surface 104, and the guide surface 104 has a tapered structure.

In some embodiments, the guide rod 102 is attached to the cylinder head 100 by an interference fit.

Reference in the specification to "some embodiments," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in various places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with a feature, structure, or characteristic of one or more other embodiments without limitation, as long as the combination is not logical or operational. Additionally, the various elements of the drawings of the present application are merely schematic illustrations and are not drawn to scale.

Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be within the spirit and scope of the invention.

Claims

1. A hollow valve bridge guide rod, comprising: one end of the guide rod is connected with the valve bridge in a sliding mode, the other end of the guide rod is fixedly connected with the cylinder cover, and a center hole is formed in the axis direction of the guide rod.

2. A hollow valve bridge guide rod according to claim 1, wherein: the wall thickness of the guide rod is more than or equal to 4 mm.

3. A hollow valve bridge guide rod according to claim 1 or claim 2, wherein: one end of the guide rod, which is in sliding connection with the cylinder cover, is also provided with a guide surface, and the guide surface is of a conical structure.

4. A hollow valve bridge guide rod according to claim 1 or claim 2, wherein: the guide rod and the cylinder cover are connected in an interference fit mode.