CN209925040U - Engine cam assembly - Google Patents

Abstract

The utility model discloses an engine cam subassembly, including the camshaft, the one end of camshaft is provided with expanded spindle nose, cup jointed one on the camshaft and be located the cam of spindle nose one side, the gasket is installed to the centre gripping between the terminal surface of spindle nose and the terminal surface of cam, install the bearing between cam and the camshaft, bearing and cam, the equal sliding connection of camshaft, the bearing can conveniently be changed, cam and camshaft direct contact friction have been avoided in the joining of bearing, except that lubricating oil is provided, can show the rotatory effective mode of help cam yet, the wearing and tearing of relevant piece have been reduced, reduce the environmental requirement of this system operation, even this position causes lubricated not enough because of reasons such as lubricated oil duct blocks up, also can ensure the normal operating of system, whole engine cam subassembly adopts split type design, convenient maintenance, cost of maintenance reduces by a wide margin.

Description

Engine cam assembly

Technical Field

The utility model relates to a mechanical component especially relates to an engine cam subassembly.

Background

Cam system, it is the important component part that engine valve actuating mechanism control combustion chamber advances, exhaust, traditional cam system comprises cam, camshaft and copper bush triplex, the one end of camshaft is provided with enlarged spindle nose, the lower terminal surface of spindle nose is connected with the up end contact of cam, this copper bush axial is embedded inside the cam and both rigid fastening are integrative, undetachable, during the installation, the camshaft passes in the copper bush inserts the cam, when the engine operates, the camshaft is static, the cam is around the high-speed rotation of axis on the camshaft, provide suitable operational environment for the cam rotation under the help of copper bush and lubricating oil, moreover, the steam generator is simple in structure, the main shortcoming of this system is: 1. compared with high-strength steel used by the camshaft, the copper bush has poorer hardness and is easy to wear, and an engine cannot normally work after being worn and generates a large amount of noise; 2. the copper bush and the cam are integrated, the copper bush needs to be integrally replaced after being worn, the resource utilization rate is low, and the maintenance cost is high; 3. because the cam and the camshaft have direct contact friction, the requirements on the operating environment (temperature and lubrication) of the cam are strict, and the potential of the engine is not favorably exerted.

Those skilled in the art have therefore endeavored to develop an engine cam assembly that improves cam rotation efficiency, reduces wear on associated components, and facilitates maintenance.

Disclosure of Invention

In view of the above-mentioned defects in the prior art, the technical problem to be solved in the present invention is to provide an engine cam assembly which improves the rotation efficiency of the cam, reduces the wear of the related components, and is convenient for maintenance.

In order to achieve the above object, the utility model provides an engine cam subassembly, including the camshaft, the one end of camshaft is provided with enlarged spindle nose, cup jointed one on the camshaft and be located the cam of spindle nose one side, install the bearing between cam and the camshaft, the bearing with equal sliding connection of cam, camshaft.

The bearing is a needle bearing, the needle bearing is composed of a shaft sleeve and a needle roller arranged on the outer side face of the shaft sleeve, the needle roller is in contact connection with the inner surface of the cam, and the inner side face of the shaft sleeve is in contact connection with the surface of the cam shaft.

The bearing has two and axial stack.

And a gasket is clamped between the end surface of the shaft head and the end surface of the cam.

The utility model has the advantages that: the utility model discloses an engine cam subassembly, including the camshaft, the one end of camshaft is provided with expanded spindle nose, cup jointed one on the camshaft and be located the cam of spindle nose one side, install the bearing between cam and the camshaft, bearing and cam, the equal sliding connection of camshaft, the bearing can conveniently be changed, cam and camshaft direct contact friction have been avoided in the joining of bearing, outside providing lubricating oil, can show the rotatory effective mode of help cam yet, the wearing and tearing of relevant piece have been reduced, reduce the environmental requirement of this system operation, even this position causes lubricated not enough because of reasons such as lubricated oil duct blocks up, the normal operating of system also can be ensured, whole engine cam subassembly adopts split type design, convenient maintenance, cost of maintenance reduces by a wide margin.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention;

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

fig. 3 is a schematic side view of the structure of the cam of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein it is noted that, in the description of the invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular manner, and therefore should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 3, an engine cam assembly comprises a cam shaft 1, one end of the cam shaft 1 is provided with an expanded shaft head 2, the cam shaft 1 is sleeved with a cam 3 positioned on one side of the shaft head 2, a bearing 5 is arranged between the cam 3 and the cam shaft 1, the bearing 5, the cam 3 and the cam shaft 1 are in sliding connection, the bearing 5 can be conveniently replaced, the addition of the bearing 5 avoids the direct contact friction between the cam and the cam shaft, provides an effective mode for remarkably helping the cam to rotate, mainly wears the bearing in operation, reduces the wear of the cam shaft and the cam, reduces the environmental requirements of the operation of the system, and can ensure the normal operation of the system even if the part is not lubricated enough due to the blockage of a lubricating oil channel and the like, and the whole engine cam assembly adopts a split design, the maintenance is convenient, the maintenance cost is greatly reduced, and the service lives of the cam and the cam shaft are prolonged.

In this embodiment, the bearing 5 is made of steel, the bearing 5 is a needle bearing, the needle bearing is composed of a sleeve 51 and a needle roller 52 installed on the outer side surface of the sleeve 51, the needle roller 52 is connected with the inner surface of the cam 3 in a contact manner, the inner side surface of the sleeve 51 is connected with the surface of the camshaft 1 in a contact manner, two bearings 5 are axially overlapped and composed of two needle bearings of the same type and specification, and the two needle bearings are independent of the cam and the camshaft, can be independently installed and detached, and are convenient to maintain and replace.

In this embodiment, the gasket 4 is installed to the centre gripping between the terminal surface of spindle nose 2 and the terminal surface of cam 3, and gasket 4 also can conveniently be changed, and the addition of gasket 4 further alleviates cam and camshaft direct contact friction.

In addition, a lubricating oil channel 6 communicated with the bearing 5 is arranged in the camshaft 1, and lubricating oil is introduced between the camshaft 1 and the bearing 5 from the outside to provide lubrication protection.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (4)

1. The utility model provides an engine cam subassembly, includes camshaft (1), the one end of camshaft (1) is provided with spindle nose (2) that expand, cup jointed one on camshaft (1) and be located cam (3) of spindle nose (2) one side, characterized by: install bearing (5) between cam (3) and camshaft (1), bearing (5) with cam (3), camshaft (1) all sliding connection.

2. The engine cam assembly of claim 1, wherein: the bearing (5) is a needle bearing, the needle bearing is composed of a shaft sleeve (51) and a needle roller (52) arranged on the outer side surface of the shaft sleeve (51), the needle roller (52) is in contact connection with the inner surface of the cam (3), and the inner side surface of the shaft sleeve (51) is in contact connection with the surface of the camshaft (1).

3. An engine cam assembly according to claim 1 or 2, wherein: the two bearings (5) are axially overlapped.

4. The engine cam assembly of claim 1, wherein: and a gasket (4) is clamped between the end surface of the shaft head (2) and the end surface of the cam (3).

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