Cam shaft with lubrication function

Abstract

The camshaft comprises a camshaft body, the camshaft body comprises a shaft body and a plurality of cams, the cams are fixedly arranged on the shaft body in a sleeving mode, an oil storage cavity is formed in the shaft body, a plurality of connecting holes are formed in the shaft body, cavities are formed in the cams, oil inlet holes are formed in the cams, and the connecting holes are communicated with the cavities. A fixing block and a connecting block are arranged on the inner wall of the cavity, the connecting block is fixedly installed in the cavity, a spring is fixedly connected between the fixing block and the connecting block, the connecting block is attached to the inner wall of the cavity, and a first oil outlet hole and second oil outlet holes which are symmetrically distributed relative to the first oil outlet hole are formed in the cam; when the cam shaft body rotates, the connecting blocks can move in the direction close to the fixing block under the action of centrifugal force, at the moment, the oil inlet holes are in an open state, lubricating oil in the oil storage cavity enters the cavity after passing through the connecting holes and the oil inlet holes and is finally discharged out of the first oil outlet holes and the second oil outlet holes in the cam, and therefore the surface of the cam is lubricated.

Description

Technical Field

[0001] The utility model relates to the technical field of camshafts, in particular to a self-lubricating camshaft. Background Art

[0002] The camshaft is a component in a piston engine that controls the opening and closing of the valves. When the camshaft rotates, it drives its own cam to rotate, thereby driving the piston to move, ultimately opening and closing the valves. However, the existing technology has the following shortcomings when used:

[0003] When the camshaft rotates, it will bear a certain impact load. As time goes by, the wear of the camshaft will become increasingly severe. A corresponding lubrication structure is required to slow down the wear rate of the camshaft and extend its service life.

[0004] Therefore, a self-lubricating camshaft is urgently needed to solve the above problems. Summary of the Invention

[0005] The purpose of the utility model is to address the problem that the existing camshaft will bear a certain impact load when rotating. As time goes by, the wear of the camshaft will become increasingly severe. A corresponding lubrication structure is needed to slow down the wear rate of the camshaft and extend its service life.

[0006] In order to achieve the above objectives, the present invention provides the following technical solutions:

[0007] A self-lubricating camshaft is provided to improve the above problems.

[0008] The specific application is as follows:

[0009] A self-lubricating camshaft comprises a camshaft body, the camshaft body comprises a shaft body and a plurality of cams, and the cam is fixedly sleeved on the shaft body, an oil storage cavity is provided inside the shaft body, a plurality of connecting holes are provided on the shaft body, a cavity is provided inside the cam, an oil inlet hole is provided on the cam, a fixing block and a connecting block are provided on the inner wall of the cavity, the connecting block is fixedly installed in the cavity, a spring is fixedly connected between the fixing block and the connecting block, the connecting block is fitted with the inner wall of the cavity, and a first oil outlet hole and a second oil outlet hole symmetrically distributed about the first oil outlet hole are provided on the cam.

[0010] As a preferred technical solution of the present application, the connecting hole is connected to the oil storage cavity, and the two ends of the oil inlet hole are respectively connected to the connecting hole and the cavity.

[0011] As a preferred technical solution of the present application, the first oil outlet hole and the second oil outlet hole are both connected to the cavity.

[0012] As a preferred technical solution of the present application, a threaded hole is provided at one end of the shaft, and a connecting bolt is installed in the threaded hole.

[0013] As a preferred technical solution of the present application, the diameter of the oil inlet hole is larger than the diameter of the connecting hole.

[0014] As a preferred technical solution of the present application, the number of the connecting holes is consistent with the number of the cams.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the scheme of this application:

[0017] 1. Through the coordinated use of the oil storage chamber, connecting hole, cavity, oil inlet hole, connecting block and spring, when the camshaft body rotates, the lubricating oil is discharged through the first oil outlet hole and the second oil outlet hole, thereby lubricating the cam surface, slowing down the wear rate of the cam during rotation and extending its service life.

[0018] 2. Through the provided threaded holes and connecting bolts, after the connecting bolts are taken out from the threaded holes, it is convenient to inject lubricating oil into the oil storage cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a self-lubricating camshaft provided in this application.

[0020] Figure 2 This is a horizontal perspective structural schematic diagram of a self-lubricating camshaft provided in this application.

[0021] Figure 3 This is a schematic cross-sectional structure diagram of a cam in a self-lubricating camshaft provided in the present application.

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of a self-lubricating camshaft center shaft body provided in this application.

[0023] Indicated in the figure:

[0024] 1. Camshaft body; 2. Shaft; 3. Cam; 4. Oil storage chamber; 5. Connecting hole; 6. Cavity; 7. Oil inlet hole; 8. Fixing block; 9. Connecting block; 10. Spring; 11. First oil outlet hole; 12. Second oil outlet hole; 13. Threaded hole; 14. Connecting bolt. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them.

[0026] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0029] In the description of this utility model, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is typically placed when in use, or the orientations or positional relationships commonly understood by those skilled in the art. Such terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" and the like are used solely for distinction and description and should not be construed as indicating or implying relative importance.

[0030] Example

[0031] like Figure 1-4As shown, a self-lubricating camshaft proposed in this embodiment includes a camshaft body 1, the camshaft body 1 includes a shaft body 2 and a plurality of cams 3, and the cams 3 are fixedly sleeved on the shaft body 2, an oil storage cavity 4 is provided inside the shaft body 2, a plurality of connecting holes 5 are opened on the shaft body 2, a cavity 6 is provided inside the cam 3, an oil inlet hole 7 is opened on the cam 3, a fixing block 8 and a connecting block 9 are provided on the inner wall of the cavity 6, and the connecting block 9 is fixedly installed in the cavity 6. When the camshaft body 1 rotates, the centrifugal force will cause the connecting block 9 to move toward the direction close to the fixing block 8. A spring 10 is fixedly connected between the fixing block 8 and the connecting block 9, and the connecting block 9 and the cavity are connected. 6 inner wall fits together, and the spring 10 is compressed and deformed under force. At this time, the oil inlet hole 7 is in an open state, and the lubricating oil in the oil storage chamber 4 enters the cavity 6 after passing through multiple connecting holes 5 and the oil inlet hole 7. A first oil outlet hole 11 and second oil outlet holes 12 symmetrically distributed about the first oil outlet hole 11 are provided on the cam 3. Finally, the lubricating oil is discharged from the first oil outlet holes 11 and the second oil outlet holes 12 on the multiple cams 3, thereby lubricating the surface of the cam 3, slowing down the wear rate of the cam 3 during rotation, and extending its service life. When the camshaft body 1 stops rotating, the elastic force of the spring 10 makes the connecting block 9 fit together with the inner wall of the cavity 6, blocking the oil inlet hole 7.

[0032] like Figure 1 、 Figure 3 and Figure 4 As shown, the connecting hole 5 is connected to the oil storage chamber 4, and the two ends of the oil inlet hole 7 are respectively connected to the connecting hole 5 and the cavity 6. When the camshaft body 1 rotates, the lubricating oil in the oil storage chamber 4 passes through multiple connecting holes 5 and the oil inlet hole 7 and enters the cavity 6 due to the action of centrifugal force.

[0033] like Figure 3 As shown, the first oil outlet hole 11 and the second oil outlet hole 12 are both connected to the cavity 6 , and the lubricating oil is eventually discharged from the first oil outlet hole 11 and the second oil outlet hole 12 on the plurality of cams 3 to lubricate the surface of the cam 3 .

[0034] like Figure 1 and Figure 4 As shown, a threaded hole 13 is formed at one end of the shaft body 2 , and a connecting bolt 14 is installed in the threaded hole 13 . The connecting bolt 14 is removed from the threaded hole 13 to facilitate the injection of lubricating oil into the oil storage chamber 4 .

[0035] like Figure 3 and Figure 4 As shown, the diameter of the oil inlet hole 7 is larger than the diameter of the connecting hole 5.

[0036] like Figure 1 、 Figure 3 and Figure 4 As shown, the number of the connecting holes 5 is the same as the number of the cams 3 .

[0037] Specifically, when the self-lubricating camshaft is in use: when the camshaft body 1 rotates, the centrifugal force causes the connecting block 9 to move toward the fixed block 8, and the spring 10 is compressed and deformed under force. At this time, the multiple oil inlet holes 7 are in an open state, and the lubricating oil in the oil storage chamber 4 enters the multiple cavities 6 after passing through the multiple connecting holes 5 and the oil inlet holes 7, and finally the lubricating oil is discharged from the first oil outlet holes 11 and the second oil outlet holes 12 on the multiple cams 3, thereby lubricating the surface of the cam 3, slowing down the wear rate of the cam 3 during rotation, extending its service life, and being more practical.

[0038] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. A self-lubricating camshaft, comprising a camshaft body (1), characterized in that: The camshaft body (1) comprises a shaft body (2) and a plurality of cams (3), and the cams (3) are fixedly sleeved on the shaft body (2); an oil storage cavity (4) is provided inside the shaft body (2); a plurality of connecting holes (5) are provided on the shaft body (2); a cavity (6) is provided inside the cam (3); an oil inlet hole (7) is provided on the cam (3); a fixing block (8) and a connecting block (9) are provided on the inner wall of the cavity (6); the connecting block (9) is fixedly installed in the cavity (6); a spring (10) is fixedly connected between the fixing block (8) and the connecting block (9); the connecting block (9) is in contact with the inner wall of the cavity (6); a first oil outlet hole (11) and a second oil outlet hole (12) symmetrically distributed about the first oil outlet hole (11) are provided on the cam (3).

2. A self-lubricating camshaft according to claim 1, characterized in that: The connecting hole (5) is connected to the oil storage cavity (4), and both ends of the oil inlet hole (7) are respectively connected to the connecting hole (5) and the cavity (6).

3. The self-lubricating camshaft according to claim 1, characterized in that: The first oil outlet hole (11) and the second oil outlet hole (12) are both in communication with the cavity (6).

4. The self-lubricating camshaft according to claim 1, characterized in that: A threaded hole (13) is formed at one end of the shaft body (2), and a connecting bolt (14) is installed in the threaded hole (13).

5. The self-lubricating camshaft according to claim 1, characterized in that: The diameter of the oil inlet hole (7) is larger than the diameter of the connecting hole (5).

6. The self-lubricating camshaft according to claim 1, characterized in that: The number of the connecting holes (5) is consistent with the number of the cams (3).

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