CN219061860U

CN219061860U - Overhead camshaft gear cavity stabilization strengthening structure

Info

Publication number: CN219061860U
Application number: CN202223457192.8U
Authority: CN
Inventors: 陈彪; 刘显宏; 朱杰; 叶洁; 罗韩佗; 杨基
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-05-23
Anticipated expiration: 2032-12-22

Abstract

The utility model discloses a stable strengthening structure of a gear cavity of an overhead cam shaft, which is characterized in that: the device comprises a cylinder cover, a driven gear and a positioning shaft, wherein a gear cavity is arranged at the right part of the cylinder cover, a positioning shaft mounting position is arranged at the inner side of the gear cavity, and a positioning counter bore is arranged at the outer part of a process hole at the outer side of the gear cavity; the left part of the positioning shaft is a gear shaft, the middle part of the positioning shaft is a limiting shaft, the right part of the positioning shaft is a flange surface, and the flange surface is matched with the positioning counter bore; the positioning shaft is fixed on the positioning shaft mounting position; the driven gear is arranged on the gear shaft. The device has the advantages of high safety, strong structure, long service life, stable operation and low failure rate.

Description

Overhead camshaft gear cavity stabilization strengthening structure

Technical Field

The utility model relates to the field of engines, in particular to a stable strengthening structure of a gear cavity of an overhead cam shaft.

Background

At present, the mounting position of a camshaft at the top of a diesel engine is respectively in three forms of lower arrangement, middle arrangement and top arrangement, and a light high-speed diesel engine generally adopts an overhead valve camshaft form (OHC). The gear cavity of current cylinder head lateral part is equipped with a driven gear, and driven gear direct mount is in one side of gear cavity, and driven gear is used for driving cam shaft gear, because the independent one side of installing in the gear cavity, intensity can not guarantee, can appear not hard up unstable risk when the engine uses for a long time and high-speed operation, leads to the operation of whole gear train, can damage the engine when serious.

The foregoing background is only for the purpose of providing an understanding of the inventive concepts and technical aspects of the present utility model and is not necessarily prior art to the present application and is not intended to be used to evaluate the novelty and creativity of the present application in the event that no clear evidence indicates that such is already disclosed at the filing date of the present application.

Disclosure of Invention

The utility model aims to provide a stable strengthening structure of a gear cavity of an overhead cam shaft, which solves the problems that the strength of a driven gear at the side part of a cylinder cover cannot be ensured, the running of the whole gear train is caused by the risk of loosening and instability when an engine is used for a long time and runs at a high speed, and the engine is damaged in serious cases.

In order to achieve the above object, the present utility model adopts the following technical scheme:

the utility model provides a stable reinforced structure in overhead camshaft gear chamber which characterized in that: the device comprises a cylinder cover, a driven gear and a positioning shaft, wherein a gear cavity is arranged at the right part of the cylinder cover, a positioning shaft mounting position is arranged at the inner side of the gear cavity, and a positioning counter bore is arranged at the outer part of a process hole at the outer side of the gear cavity; the left part of the positioning shaft is a gear shaft, the middle part of the positioning shaft is a limiting shaft, the right part of the positioning shaft is a flange surface, and the flange surface is matched with the positioning counter bore; the positioning shaft is fixed on the positioning shaft mounting position; the driven gear is arranged on the gear shaft.

Further, three screw holes are respectively arranged at the center positions of the positioning shaft and the positioning shaft installation position, and the three screw holes are distributed in a triangular mode.

Further, the three screw holes of the positioning shaft correspond to the three screw holes of the positioning shaft installation position.

Further, an oil inlet hole is formed in the positioning shaft mounting position, an oil inlet cavity is formed in the left end of the gear shaft, and two symmetrical lubricating holes are formed in the side portion of the gear shaft; the oil inlet cavity is respectively communicated with the oil inlet hole and the lubricating hole.

Compared with the prior art, the utility model has the advantages that:

the utility model mainly comprises a cylinder cover, a driven gear and a positioning shaft, wherein the left end of the positioning shaft is fixed on the inner side of a gear cavity of the cylinder cover, the right end of the positioning shaft is fixed on a positioning counter bore on the outer side of the gear cavity, the left end and the right end of the positioning shaft are fixed, the driven gear is arranged on the positioning shaft, the driven gear can stably run when the engine is used for a long time and runs at a high speed, and meanwhile, the right end of the positioning shaft is fixed on the positioning counter bore on the outer side of the gear cavity, so that the integral structural strength of the gear cavity can be effectively improved. The device has the advantages of high safety, strong structure, long service life, stable operation and low failure rate.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the cylinder head positioning shaft mounting location of the present utility model;

fig. 3 is a schematic structural view of the positioning shaft of the present utility model.

Detailed Description

The present utility model will be described in further detail with reference to the following embodiments. It should be emphasized that the following description is merely exemplary in nature and is in no way intended to limit the scope of the utility model or its applications.

As shown in fig. 1 to 3, a stable strengthening structure for a gear cavity of an overhead cam shaft is characterized in that: the device comprises a cylinder cover 1, a driven gear 2 and a positioning shaft 3, wherein a gear cavity 4 is arranged at the right part of the cylinder cover 1, a positioning shaft mounting position 5 is arranged at the inner side of the gear cavity 4 and used for mounting the positioning shaft 3, and a positioning counter bore 7 is arranged at the outer part of a process hole 6 at the outer side of the gear cavity 4; the left part of the positioning shaft 3 is provided with a gear shaft 8 for installing the driven gear 2, the middle part is provided with a limiting shaft 9 for limiting the positioning of the driven gear 2 on the gear shaft 8, the right part of the positioning shaft 3 is provided with a flange surface 10, and the flange surface 10 is matched with the positioning counter bore 7, so that the positioning shaft 3 is supported, and the positioning shaft has the advantages of stable structure and high strength; the positioning shaft 3 is fixed on the positioning shaft mounting position 5; the driven gear 2 is arranged on a gear shaft 8; the center positions of the positioning shaft 3 and the positioning shaft installation position 5 are respectively provided with three screw holes 11, the three screw holes 11 are distributed in a triangular mode, the three screw holes of the positioning shaft correspond to the three screw holes of the positioning shaft installation position, and the positioning shaft 3 is fixed on the positioning shaft installation position 5 through the cooperation of three bolts and the three screw holes 11; an oil inlet hole 12 is formed in the positioning shaft mounting position 5, an oil inlet cavity 13 is formed in the left end of the gear shaft 8, and two symmetrical lubricating holes 14 are formed in the side portion of the gear shaft 8; the oil inlet cavity 13 is respectively communicated with the oil inlet hole 12 and the lubrication hole 14, and lubricating oil of the oil inlet hole 12 is introduced into the oil inlet cavity 13 and then enters the lubrication hole 14 to lubricate the driven gear 2 arranged on the gear shaft 8.

The foregoing is a further detailed description of the utility model in connection with specific/preferred embodiments, and is not intended to limit the practice of the utility model to such description. It will be apparent to those skilled in the art that several alternatives or modifications can be made to the described embodiments without departing from the spirit of the utility model, and these alternatives or modifications should be considered to be within the scope of the utility model.

Claims

1. The utility model provides a stable reinforced structure in overhead camshaft gear chamber which characterized in that: the device comprises a cylinder cover, a driven gear and a positioning shaft, wherein a gear cavity is arranged at the right part of the cylinder cover, a positioning shaft mounting position is arranged at the inner side of the gear cavity, and a positioning counter bore is arranged at the outer part of a process hole at the outer side of the gear cavity; the left part of the positioning shaft is a gear shaft, the middle part of the positioning shaft is a limiting shaft, the right part of the positioning shaft is a flange surface, and the flange surface is matched with the positioning counter bore; the positioning shaft is fixed on the positioning shaft mounting position; the driven gear is arranged on the gear shaft.

2. The overhead camshaft gear cavity stability enhancement structure of claim 1, wherein: the center positions of the positioning shaft and the positioning shaft installation position are respectively provided with three screw holes, and the three screw holes are distributed in a triangular mode.

3. The overhead camshaft gear cavity stability enhancement structure of claim 2, wherein: the three screw holes of the positioning shaft correspond to the three screw holes of the positioning shaft installation position.

4. The overhead camshaft gear cavity stability enhancement structure of claim 1, wherein: an oil inlet hole is formed in the positioning shaft mounting position, an oil inlet cavity is formed in the left end of the gear shaft, and two symmetrical lubricating holes are formed in the side portion of the gear shaft; the oil inlet cavity is respectively communicated with the oil inlet hole and the lubricating hole.