CN214145605U

CN214145605U - Integrated camshaft structure

Info

Publication number: CN214145605U
Application number: CN202022325219.2U
Authority: CN
Inventors: 傅鲁华
Original assignee: Ningbo Yushun Hydraulic Co ltd
Current assignee: Ningbo Yushun Hydraulic Co ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-09-07
Anticipated expiration: 2030-10-19

Abstract

The utility model provides an integral type camshaft structure, including the axis body, gear connection end, cam, fixed axle journal and axle journal oil groove, wherein: the gear connecting end is arranged at one end of the shaft body; the outer surface of the shaft body is provided with cams with different angles at intervals, the cams with the same angle are a pair of cams, a fixed shaft neck is arranged between each pair of cams, and the outer surface of each fixed shaft neck is annularly and uniformly provided with shaft neck oil grooves; the cam includes a square groove and a cam oil groove. The utility model discloses the setting of square groove, cam oil groove and axle journal oil groove makes the cam keep lubricated, reduces the friction of fixed axle journal and cam axle bush simultaneously, avoids the emergence of abnormal sound, because the structure of recess and oil groove is whole can not influence the intensity and the toughness of camshaft for the millimeter level, has increased the lubrication simultaneously, has increased the life of camshaft.

Description

Integrated camshaft structure

Technical Field

The utility model belongs to the technical field of the engine camshaft structure, especially, relate to integral type camshaft structure.

Background

Camshaft design plays an important role in the design of engines because it is used to control the opening and closing of valves, and the valve motion law is related to the power and operating characteristics of an engine, so that the power, torque output and smoothness of operation of the camshaft and the engine are in direct relation.

The cam shaft bears periodic impact load, the contact stress between the cam and the tappet is large, and the relative sliding speed is also high, so that the abrasion of the working surface of the cam is a common serious problem, the abrasion can cause the increase of gaps between the cam shaft and a bearing seat and between a driving cam and a hydraulic tappet, the axial displacement can occur during the movement of the cam shaft and the impact can occur when the cam shaft is combined with the hydraulic tappet, so that abnormal sound is generated, and serious faults such as fracture and the like can occur for a long time; aiming at the situation, the camshaft journal and the working surface of the cam are required to have higher wear resistance and good lubrication besides higher dimensional accuracy, smaller surface roughness and enough rigidity, but the existing camshaft has the problems that the service life of the camshaft is influenced because the lubrication condition is not ideal, the wear of the cam surface is easy to cause, and the oil supply pressure is insufficient because the oil pump is used for too long time and the like because the following points 1 are provided; 2. the lubricating oil channel is blocked, so that the lubricating oil cannot reach the camshaft; 3. the bearing cover fastening bolt has overlarge tightening torque, so that lubricating oil cannot enter a gap of the camshaft; these are the causes of abnormal wear of the camshaft.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an integral type camshaft structure to solve current camshaft because the lubrication situation is unsatisfactory, cause cam surface wearing and tearing easily, influence camshaft life's problem. Integral type camshaft structure, including the axis body, gear connection end, cam, fixed axle journal and axle journal oil groove, wherein: the gear connecting end is arranged at one end of the shaft body; the surface interval of axis body is equipped with the cam of different angles to the cam of the same angle is a pair of, all is equipped with fixed axle journal in the middle of a pair of cam, and this fixed axle journal surface is the annular and evenly is equipped with the axle journal oil groove.

The cam comprises a square groove and a cam oil groove, the square groove is formed in the top end of the cam, and the square groove and the shaft body are horizontally arranged; the cam oil groove is perpendicular to the shaft body, and the cam oil groove is around seting up the surface on the cam top.

The deepest depth of the square groove is 2-4 mm, and the two sides of the square groove are subjected to round chamfering treatment, so that the contact surface is reduced, the top end of the cam can be kept lubricated, friction is reduced, and the service life of the cam is prolonged.

The cam oil grooves are S-shaped, the depth is 2-3 mm, the number is 3, and the middle cam oil groove is vertically crossed with the square groove; cam oil groove both sides all are handled through circular chamfer, with the cooperation of square groove, the oil groove of millimeter level can make the cam collect the lubricating oil in the engine in the rotation under the circumstances that does not reduce cam intensity and toughness, makes the cam top keep lubricated.

The journal oil grooves are uninterrupted S-shaped and distributed on the outer surface of the fixed journal in a surrounding manner, the depth of each journal oil groove is 2-3 mm, and the number of the journal oil grooves is 6-8; the axle journal oil groove both sides all are handled through circular chamfer, and lubricating oil in the engine also can get into fixed axle journal under the condition that does not reduce fixed axle journal intensity and toughness of millimeter level oil groove, can reduce the friction of axle journal and cam axle bush, avoids the emergence of abnormal sound.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses the setting of square groove and cam oil groove can reduce partly cam and carminative contact surface, reduces the friction surface, and cooperates with the cam oil groove, can let the cam collect the lubricating oil in the engine in the rotation, makes the cam top keep lubricated, reduces the friction, increases the life of camshaft.

2. The utility model discloses the setting of axle journal oil groove, the lubricating oil in the engine also can get into fixed axle journal under the condition that does not reduce fixed axle journal intensity and toughness of millimeter level oil groove, can reduce the friction of fixed axle journal and cam axle bush, avoids the emergence of abnormal sound.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the cam structure of the present invention;

fig. 3 is a schematic view of the structure of the fixed journal of the present invention.

In the figure:

1-shaft body, 2-gear connecting end, 3-cam, 31-square groove, 32-cam oil groove, 4-fixed shaft neck and 5-shaft neck oil groove.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below, 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 shall belong to the protection scope of the present invention.

As shown in figures 1 to 3.

The utility model provides an integral type camshaft structure, including axis body 1, gear connection end 2, cam 3, fixed axle journal 4 and axle journal oil groove 5, wherein: the gear connecting end 2 is arranged at one end of the shaft body 1; the outer surface of the shaft body 1 is provided with cams 3 with different angles at intervals, the cams 3 with the same angle are a pair, fixed shaft necks 4 are arranged between the cams 3, and shaft neck oil grooves 5 are uniformly formed in the outer surface of each fixed shaft neck 4 in an annular shape; the cam 3 comprises a square groove 31 and a cam oil groove 32, the square groove 31 is formed in the top end of the cam 3, and the square groove 31 and the shaft body 1 are horizontally arranged; the cam oil groove 32 is perpendicular to the shaft body 1, and the cam oil groove 32 is formed on the outer surface of the top end of the cam 3 in a surrounding mode; the deepest depth of the square groove 31 is 2-4 mm, and both sides of the square groove 31 are subjected to round chamfering treatment; the cam oil grooves 32 are S-shaped, the depth is 2-3 mm, the number is 3, and the middle cam oil groove 32 is vertically crossed with the square groove 31; both sides of the cam oil groove 32 are subjected to round chamfering treatment and are matched with the square groove 31; journal oil groove 5 is incessant S type, is to encircle the surface that distributes at fixed journal 4, just journal oil groove 5' S degree of depth is 2 to 3mm, and quantity is 6 to 8, journal oil groove 5 both sides all are handled through circular chamfer.

User' S camshaft is installed in the engine, in the operation process, square groove 31 and the cooperation of cam oil groove 32, lubricating oil is collected to cam oil groove 32, the lubricating oil that one of them cam oil groove 32 was collected flows in square groove 21, make cam 3 keep lubricated, reduce friction, lubricating oil in the engine can also get into fixed journal 4 under the condition that does not reduce fixed journal 4 intensity and toughness to journal oil groove 5, reduce the friction of fixed journal 4 and cam axle bush, avoid the emergence of abnormal sound, because the structure of recess and oil groove is whole for the millimeter level, the shape is the S type, and circular chamfer has been carried out to it and has been handled, can not influence the intensity and the toughness of camshaft, the lubrication has been increased simultaneously, the life of camshaft has been increased.

Utilize technical scheme, or technical personnel in the field are in the utility model discloses under technical scheme's the inspiration, design similar technical scheme, and reach above-mentioned technological effect, all fall into the utility model discloses a protection scope.

Claims

1. Integral type camshaft structure, its characterized in that: including axis body (1), gear connection end (2), cam (3), fixed axle journal (4) and axle journal oil groove (5), wherein: the gear connecting end (2) is arranged at one end of the shaft body (1); the outer surface interval of axis body (1) is equipped with cam (3) of different angles to cam (3) of the same angle are a pair of, all are equipped with fixed axle journal (4) in the middle of a pair of cam (3), and this fixed axle journal (4) surface is the annular and evenly is equipped with axle journal oil groove (5).

2. The integrated camshaft structure as claimed in claim 1, wherein: the cam (3) comprises a square groove (31) and a cam oil groove (32), the square groove (31) is formed in the top end of the cam (3), and the square groove (31) and the shaft body (1) are horizontally arranged; the cam oil groove (32) is perpendicular to the shaft body (1), and the cam oil groove (32) is surrounded on the outer surface of the top end of the cam (3).

3. The integrated camshaft structure as claimed in claim 2, wherein: the deepest depth of the square groove (31) is 2-4 mm, and both sides of the square groove (31) are subjected to round chamfering treatment.

4. The integrated camshaft structure as claimed in claim 2, wherein: the cam oil grooves (32) are S-shaped, the depth is 2-3 mm, the number is 3, and the middle cam oil groove (32) is vertically crossed with the square groove (31); and both sides of the cam oil groove (32) are subjected to round chamfer processing and are matched with the square groove (31).

5. The integrated camshaft structure as claimed in claim 1, wherein: the journal oil groove (5) is uninterrupted S-shaped and is distributed on the outer surface of the fixed journal (4) in a surrounding manner, the depth of the journal oil groove (5) is 2-3 mm, and the number of the journal oil grooves is 6-8; and both sides of the journal oil groove (5) are subjected to round chamfer processing.