Air inlet cam shaft of engine

Abstract

The utility model provides an air inlet cam shaft of an engine, and belongs to the technical field of automobile accessories. The problem that an existing camshaft is short in service life is solved. The engine air inlet cam shaft comprises a shaft body, the two sides of the shaft body are fixedly sleeved with a front end piece and an outer wheel respectively, a lubricating oil hole is formed in one side of the front end piece, one side of the lubricating oil hole penetrates through the shaft body and the outer wheel, a shaft neck is sleeved with the center of the exterior of the shaft body, and an oil guide groove is formed in the center of the exterior of the shaft neck. A plurality of oil throwing holes are formed in the inner wall of the oil guide groove, positioning rings are arranged on the two sides of the inner wall of the oil guide groove, a magnetic filter screen is connected between the two positioning rings, a plurality of inner hexagonal positioning bolts are arranged on the opposite sides of the two positioning rings, and the sides, away from the inner wall of the oil guide groove, of the inner hexagonal positioning bolts penetrate through the positioning rings and extend into the shaft neck. Oil channels are formed in the top and the bottom of the exterior of the outer wheel. The lubricating oil filter can achieve dynamic filtering, improves cleanliness of lubricating oil, and is long in service life.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and specifically relates to an engine intake camshaft. Background Technology

[0002] The camshaft is a component in a piston engine. Its function is to control the opening and closing of the valves. The camshaft rotates at a very high speed and needs to withstand a large torque, so the design of the camshaft requires high strength and support.

[0003] For example, Chinese patent literature discloses an intake camshaft, engine, and vehicle [Application No.: 202420013493.1; Authorization Announcement No.: CN221799913U]. The intake camshaft includes: a shaft body; at least one cam group, the cam group including a first cam and a second cam, the first cam including a first base circle and a first protrusion connected to one side of the first base circle, the first cam having a first through hole through the center of the first base circle, the second cam including a second base circle and a second protrusion connected to one side of the second base circle, the second cam having a second through hole through the center of the second base circle, the first cam and the second cam both being sleeved on the shaft body and fixedly connected to the shaft body, the lift of the first cam being greater than the lift of the second cam, and the wrap angle of the first cam being greater than the wrap angle of the second cam.

[0004] The intake camshaft in the aforementioned patent can achieve precise control of the asymmetric intake requirements within the same cylinder, improving engine thermal efficiency and having a lower cost. However, it cannot adsorb metal debris in the lubricating oil. The longer the camshaft runs, the more metal debris accumulates in the lubricating oil, eventually causing frictional damage to the camshaft and resulting in an unsatisfactory service life. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by providing an engine intake camshaft capable of adsorbing metal debris from lubricating oil.

[0006] The objective of this utility model can be achieved through the following technical solution: an engine intake camshaft, including a shaft body, a front end piece and an outer wheel respectively fixedly sleeved on both sides of the shaft body, a lubricating oil hole is opened on one side of the front end piece, and one side of the lubricating oil hole passes through the shaft body and the outer wheel, a journal is sleeved at the center of the outer side of the shaft body, an oil guide groove is opened at the center of the outer side of the journal, a plurality of oil throwing holes are opened on the inner wall of the oil guide groove, a positioning ring is provided on both sides of the inner wall of the oil guide groove, a magnetic filter is connected between two positioning rings, a plurality of internal hexagon positioning bolts are provided on the opposite side of the two positioning rings, and the side of the internal hexagon positioning bolts away from the inner wall of the oil guide groove passes through the positioning rings and extends into the inside of the journal, and oil passages are opened at the top and bottom of the outer wheel.

[0007] The intake camshaft of this engine uses a combination of an oil slinger, an oil guide groove, an internal hexagonal locating bolt, a locating ring, and a magnetic filter to separate metal debris from the lubricating oil using centrifugal force. The magnetic filter achieves dynamic filtration, improving the cleanliness of the lubricating oil and reducing wear on the journal and bearing.

[0008] In the aforementioned engine intake camshaft, a locating pin hole is provided on the top of one side of the outer wheel, and a locating pin is provided on the top of the other side of the outer wheel. One side of the locating pin extends into the interior of the locating pin hole, and the oil passage cooperates with the locating pin hole. Through the cooperation of the locating pin hole and the oil passage, after the engine starts, oil enters the locating pin hole through the oil passage, pushing out the locating pin, which is beneficial for the subsequent high-precision adjustment of the camshaft's lower phase.

[0009] In the aforementioned engine intake camshaft, the other side of the oil slinger hole extends through the journal at a 45° angle. This 45° angled oil slinger hole design enhances the centrifugal effect.

[0010] In the aforementioned engine intake camshaft, the locating ring has several rotating grooves that mate with hexagonal socket head cap screws, and the journal has several locating screw holes that mate with hexagonal socket head cap screws. The locating ring is positioned and installed by the interaction of the rotating grooves and the locating screw holes.

[0011] Compared with existing technologies, the intake camshaft of this engine uses the combination of an oil slinger hole, an oil guide groove, an internal hexagonal locating bolt, a locating ring, and a magnetic filter to separate metal debris from the lubricating oil using centrifugal force. The magnetic filter achieves dynamic filtration, improving the cleanliness of the lubricating oil and reducing wear on the journals and bearings, resulting in a longer service life. Furthermore, the internal hexagonal locating bolt allows the locating ring and magnetic filter to be removed and replaced. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a cross-sectional view of the front-end component structure of this utility model.

[0014] Figure 3 This is a cross-sectional view of the outer wheel structure of this utility model.

[0015] Figure 4 This is a schematic diagram of the journal structure of this utility model.

[0016] Figure 5 This is a utility model Figure 1 A magnified view of A in the middle.

[0017] In the diagram: 1. Front end part; 2. Shaft body; 3. Journal; 4. Outer wheel; 5. Lubricating oil hole; 6. Locating pin hole; 7. Locating pin; 8. Oil slinger hole; 9. Oil guide groove; 10. Hex socket head cap screw; 11. Locating ring; 12. Magnetic filter screen; 13. Oil passage. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the intake camshaft of this engine includes a shaft body 2. A front end piece 1 and an outer wheel 4 are fixedly sleeved on both sides of the shaft body 2, respectively. A lubricating oil hole 5 is opened on one side of the front end piece 1. The lubricating oil hole 5 passes through the shaft body 2 and the outer wheel 4 on one side. A journal 3 is sleeved at the center of the outer side of the shaft body 2. An oil guide groove 9 is opened at the center of the outer side of the journal 3. Several oil sling holes 8 are opened on the inner wall of the oil guide groove 9. A positioning ring 11 is provided on both sides of the inner wall of the oil guide groove 9. A magnetic filter screen 12 is connected between two positioning rings 11. Several hexagon socket positioning bolts 10 are provided on the opposite side of the two positioning rings 11. The side of the hexagon socket positioning bolts 10 away from the inner wall of the oil guide groove 9 passes through the positioning ring 11 and extends into the interior of the journal 3. Oil passages 13 are opened at the top and bottom of the outer side of the outer wheel 4.

[0020] To elaborate further, a locating pin hole 6 is provided on the top of one side of the outer wheel 4, and a locating pin 7 is provided on the top of one side of the outer wheel 4. One side of the locating pin 7 extends into the interior of the locating pin hole 6, and the oil passage 13 is used in conjunction with the locating pin hole 6. The other side of the oil slinger hole 8 penetrates the journal 3 at a 45° angle. Several rotating grooves that cooperate with the internal hexagonal locating bolts 10 are provided through the locating ring 11, and several locating screw holes that cooperate with the internal hexagonal locating bolts 10 are provided through the journal 3.

[0021] In use, this invention utilizes the cooperation of the oil slinger hole 8, oil guide groove 9, internal hexagonal locating bolt 10, locating ring 11, and magnetic filter 12 to separate metal debris from the lubricating oil using centrifugal force. The magnetic filter 12 achieves dynamic filtration, improving the cleanliness of the lubricating oil and reducing wear on the journal 3 and bearing. Furthermore, the internal hexagonal locating bolt 10 allows for the removal and replacement of the locating ring 11 and magnetic filter 12. After engine startup, oil enters the locating pin hole 6 through the oil passage 13, pushing out the locating pin 7, which facilitates subsequent high-precision adjustment of the camshaft's lower phase.

[0022] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. An engine inlet camshaft comprising a shaft body (2), characterised in that: The both sides of the shaft body (2) are respectively fixedly sleeved with a front end piece (1) and an outer wheel (4), one side of the front end piece (1) is provided with a lubricating oil hole (5), one side of the lubricating oil hole (5) penetrates the shaft body (2) and the outer wheel (4), the outer center of the shaft body (2) is sleeved with a shaft neck (3), the outer center of the shaft neck (3) is provided with an oil guide groove (9), the inner wall of the oil guide groove (9) is provided with a plurality of oil throwing holes (8), the both sides of the inner wall of the oil guide groove (9) are provided with positioning rings (11), the two positioning rings (11) are connected with a magnetic filter screen (12), the opposite side of the two positioning rings (11) is provided with a plurality of inner hexagonal positioning bolts (10), one side of the inner hexagonal positioning bolt (10) away from the inner wall of the oil guide groove (9) penetrates the positioning ring (11) and extends to the inside of the shaft neck (3), the top and the bottom of the outer wheel (4) are provided with oil channels (13).

2. An engine intake camshaft as claimed in claim 1, characterized in that: The top of one side of the outer wheel (4) is provided with a positioning pin hole (6), the top of one side of the outer wheel (4) is provided with a positioning pin (7), one side of the positioning pin (7) extends to the inside of the positioning pin hole (6), and the oil channel (13) is used in cooperation with the positioning pin hole (6).

3. An engine intake camshaft as claimed in claim 1, characterized in that: The other side of the oil throwing hole (8) penetrates the shaft neck (3) at an angle of 45°.

4. An engine intake camshaft as claimed in claim 1, characterized in that: A plurality of rotation grooves matched with the inner hexagonal positioning bolts (10) are penetrated on the positioning ring (11), and a plurality of positioning screw holes matched with the inner hexagonal positioning bolts (10) are penetrated on the shaft neck (3).

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