A valve cover structure for avoiding lubricating oil impact

Abstract

The present invention discloses a valve chamber cover structure that avoids the impact of lubricating oil, including a valve chamber cover that covers the upper end of the engine cylinder head, the rear end surface of the valve chamber cover is provided with an oil return port connected to the oil outlet of the vacuum pump, and the oil in the oil outlet enters the inner cavity of the valve chamber cover; an oil drain groove is provided on the inner edge of the bottom surface of the valve chamber cover that matches the engine cylinder head, the oil drain groove is close to the oil outlet of the vacuum pump and extends along the oil outlet direction, the inner cavity of the oil drain groove is a circular arc surface, and the inner side of the circular arc surface faces the inner cavity of the valve chamber cover; a baffle is provided on the oil outlet of the vacuum pump; the oil drain groove is located on the side of the baffle, and the length direction of the oil drain groove is perpendicular to the baffle surface of the baffle. The valve chamber cover of the present invention adopts an oil drain groove, which can avoid the oil of the vacuum pump return oil directly impacting the rubber layer, increase the life of the rubber layer, and prevent oil leakage.

Description

Technical Field

[0001] The invention relates to the technical field of engine manufacturing, in particular to a valve chamber cover structure capable of avoiding impact of lubricating oil. Background Art

[0002] The vacuum pump is the power source for the vehicle's brake assist and steering assist. The vacuum pump is connected to the engine cylinder head and driven by the engine camshaft to drive its drive shaft to rotate, so that the vacuum pump can generate a vacuum pressure difference. The vacuum pump needs to be lubricated from the engine oil circuit. The existing vacuum pump lubrication oil circuit is usually connected by a hose, which is costly and prone to aging, affecting the lubrication effect. In order to enhance the lubrication effect and make the engine more compact, the vacuum pump's oil inlet and outlet can be directly connected to the oil outlet and return port in the internal oil circuit of the cylinder head or valve cover.

[0003] In the existing valve cover design, the engine uses the valve cover to cover the cylinder head, and the valve cover and the cylinder head are sealed with glue. The oil outlet of the vacuum pump connected to the oil return port of the valve cover is just facing the glue layer. When the vacuum pump is discharged from the oil return port, it cannot buffer the impact of the vacuum pump's oil discharge, which is easy to damage the glue layer between the valve cover and the cylinder head. The drive shaft of the vacuum pump is proportional to the engine speed. The higher the engine speed, the greater the return oil flow rate, the higher the oil flow rate, the greater the destructive force on the glue layer, and the more likely it is to cause oil leakage. Summary of the invention

[0004] In view of the above-mentioned existing defects, the purpose of the present invention is to provide a valve chamber cover structure that avoids the impact of lubricating oil. The valve chamber cover adopts an oil drain groove to avoid the oil returned from the vacuum pump from directly impacting the rubber layer, thereby increasing the life of the rubber layer and preventing oil leakage.

[0005] The technical solution of the present invention is as follows:

[0006] A valve chamber cover structure for avoiding the impact of lubricating oil, comprising a valve chamber cover covering the upper end of an engine cylinder head, wherein the rear end face of the valve chamber cover is provided with an oil return port connected to the oil outlet of a vacuum pump; an oil drain groove is provided on the inner edge of the bottom surface of the valve chamber cover that cooperates with the engine cylinder head, the oil drain groove is close to the oil return port and extends along the direction of the oil outlet, the inner cavity of the oil drain groove is a circular arc surface, and the inner side of the circular arc surface faces the inner cavity of the valve chamber cover; a baffle is provided on the oil outlet; the oil drain groove is located on the side of the baffle, and the length direction of the oil drain groove is perpendicular to the baffle surface of the baffle.

[0007] Specifically, a side of the baffle facing the oil outlet is configured as a plane.

[0008] Specifically, one end of the oil drain groove extends toward the oil return port to at least partially surround the outer side surface of the oil outlet port.

[0009] Specifically, the cross-section of the inner cavity of the oil drain groove is configured as a 1 / 4 arc surface.

[0010] Specifically, the oil drain groove and the oil outlet are coaxially arranged.

[0011] Beneficial effects of the present invention:

[0012] 1. The valve cover of the present invention has an oil drain groove structure, and the oil return port is close to the oil drain groove. When the engine starts to run, the oil flowing through the vacuum pump comes out from the baffle position and flows to the left and right sides. As the engine speed increases, the oil flow rate increases and the impact force becomes stronger. The present invention opens an oil drain groove on the valve cover, and the oil drain groove has an arc surface. When the oil comes out from the baffle of the vacuum pump, the oil impacts the arc surface of the oil drain groove. After the oil is guided by the arc surface, the impact force of the oil is buffered, which reduces the force of the oil on the rubber layer, effectively increases the life of the rubber layer, and prevents the oil from leaking to the outside of the engine.

[0013] 2. The oil drain tank of the present invention has a simple structure, is easy to process, and has great promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a valve cover structure for avoiding impact of lubricating oil according to Example 1 of the present invention.

[0015] Figure 2 This is a schematic diagram of a valve cover structure for avoiding impact of lubricating oil according to Example 2 of the present invention.

[0016] Figure 3 It is a schematic diagram of the oil drain groove of the valve cover of the present invention.

[0017] In the figure, 1-cylinder head, 2-valve cover, 3-vacuum pump, 4-oil outlet, 5-oil return port, 6-oil drain groove, 7-blocking plate, 8-rubber coating layer. DETAILED DESCRIPTION

[0018] In order to explain the technical content, purpose and effect of the present invention in detail, the following is an explanation in combination with embodiments and accompanying drawings. In the description of the embodiments, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0019] Example 1

[0020] According to a specific implementation of the present invention, a valve cover structure for avoiding lubricating oil impact is provided. Figure 1 , 3 As shown, it includes a valve chamber cover 2 covering the upper end of the engine cylinder head 1, and the rear end face of the valve chamber cover 2 is provided with an oil return port 5 connected to the oil outlet port 4 of the vacuum pump 3, and the oil outlet port 4 extends into the oil return port 5 and enters the inner cavity of the valve chamber cover 2; an oil drain groove 6 is provided on the inner edge of the bottom surface of the valve chamber cover 2 that cooperates with the engine cylinder head 1, and the oil drain groove 6 is close to the oil return port 5 and extends along the direction of the oil outlet port 4, and the inner cavity of the oil drain groove 6 is a circular arc surface, and the inner side of the circular arc surface faces the inner cavity of the valve chamber cover 2; a baffle 7 is provided on the oil return port 5; the oil drain groove 6 is located on the side of the baffle 7, and the length direction of the oil drain groove 6 is perpendicular to the baffle surface of the baffle 7.

[0021] When the engine is running, the engine oil pump delivers the oil to the main oil channel to lubricate the engine parts, and then delivers it to the cylinder head 1. At the same time, the oil enters the vacuum pump 3 through the oil inlet. After lubrication, the oil flows from the oil outlet 4 to the oil return port 5 of the valve cover 2 into the inner cavity, and finally flows back to the oil pan. The valve cover 2 of the present invention is provided with an oil drain groove 6 structure, and the oil outlet 4 of the vacuum pump 3 is close to the oil drain groove 6. Figure 1 As shown, when the engine starts to run, the oil flowing through the vacuum pump 3 comes out from the baffle 7 and flows to the left and right sides. As the engine speed increases, the oil flow rate increases and the impact force becomes stronger. The oil drain groove 7 is located on one side of the baffle 7. When the oil comes out of the baffle 7 of the vacuum pump 3, it is guided into the oil drain groove 6. The oil drain groove 6 has an arc surface. When the oil impacts the arc surface of the oil drain groove 6, the impact force of the oil is buffered by the guidance of the arc surface, which weakens the force of the oil on the rubber layer 8, effectively increases the life of the rubber layer 8, and prevents the oil from leaking to the outside of the engine. The purpose of the present invention is achieved. In addition, the oil drain groove of the present invention has a simple structure and is easy to process, so it has great promotion prospects.

[0022] Example 2

[0023] like Figure 2As shown, based on the embodiment 1, one end of the oil drain groove 6 in this embodiment extends toward the oil return port 5 to at least partially surround the outer side of the oil outlet port 4. When the engine starts to run, the oil flowing through the vacuum pump 3 comes out from the baffle 7 and flows to the left and right sides. As the engine speed increases, the oil flow rate increases and the impact force becomes stronger. A part of the oil flows into the oil return port 5 along the baffle 7, and a part of the oil is blocked by the baffle 7 and then rushes to the joint surface between the valve cover 2 and the cylinder head, and then flows into the oil return port 5 after flushing the rubber layer on the joint surface. By extending the oil drain groove 6 to the periphery of the oil outlet port 4, the impact of the oil on the rubber layer 8 at the end of the oil outlet port 4 is further reduced.

[0024] As the preferred technical solution of this embodiment, Figure 1 As shown, the side of the baffle 7 facing the oil outlet 4 is configured as a plane, and the processing structure is simple, which facilitates the oil to flow to the oil drain groove 6 on the side.

[0025] As the preferred technical solution of this embodiment, Figure 3 As shown, the cross-section of the inner cavity of the oil drain groove 6 is configured as a 1 / 4 arc surface, forming an upward flow-guiding structure, so that the engine oil is further buffered under the action of gravity.

[0026] As a preferred technical solution of this embodiment, the oil drain groove 6 and the oil outlet 4 are coaxially arranged and have the same gap, so that the oil has the same flow direction under the same gap.

[0027] Although the present invention has been described in detail above with specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A valve cover structure for avoiding the impact of lubricating oil, comprising a valve cover (2) covering the upper end of an engine cylinder head (1), characterized in that: The rear end surface of the valve chamber cover (2) is provided with an oil return port (5) connected to the oil outlet port (4) of the vacuum pump (3); the oil outlet port (4) extends into the oil return port (5) and enters the inner cavity of the valve chamber cover (2); An oil drain groove (6) is provided on the inner edge of the bottom surface of the valve chamber cover (2) matched with the engine cylinder head (1), the oil drain groove (6) is close to the oil return port (5) and extends in the direction of the oil outlet port (4), the inner cavity of the oil drain groove (6) is a circular arc surface, and the circular arc surface guides the inner cavity of the valve chamber cover (2); The oil return port is provided with a baffle (7); the oil drain groove (6) is located on the side of the baffle (7), and the length direction of the oil drain groove (6) is perpendicular to the baffle surface of the baffle (7); The inner cavity of the oil drain groove (6) is a 1 / 4 arc surface.

2. The valve cover structure for avoiding lubricating oil impact according to claim 1, characterized in that: One end of the oil drain groove (6) extends toward the oil return port (5) and at least partially surrounds the outer side surface of the oil outlet port (4).

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