阅读说明：本技术 发动机缸盖护罩 (Engine cylinder cover shield ) 是由 陈亮 罗亚伟 孟宪昌 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种发动机缸盖护罩,包括缸盖护罩(1)和加机油口盖(2),所述缸盖护罩(1)上形成有机油加注口(11),所述机油加注口(11)内安装有挡板组件(5),所述挡板组件(5)与所述机油加注口(11)的内壁滑动配合,所述挡板组件(5)可沿所述机油加注口(11)的轴向移动,所述加机油口盖(2)与所述挡板组件(5)螺纹连接,所述挡板组件(5)上形成有机油加注通道(54),当所述加机油口盖(2)安装到位后所述加机油口盖(2)完全封堵所述机油加注通道(54)。本发明既能够保证完全密封机油加注口又能够有效解决机油乳化问题。(The invention discloses an engine cylinder cover shield which comprises a cylinder cover shield (1) and an engine oil filling port cover (2), wherein an engine oil filling port (11) is formed in the cylinder cover shield (1), a baffle assembly (5) is installed in the engine oil filling port (11), the baffle assembly (5) is in sliding fit with the inner wall of the engine oil filling port (11), the baffle assembly (5) can move along the axial direction of the engine oil filling port (11), the engine oil filling port cover (2) is in threaded connection with the baffle assembly (5), an engine oil filling channel (54) is formed in the baffle assembly (5), and the engine oil filling channel (54) is completely blocked by the engine oil filling port cover (2) after the engine oil filling port cover (2) is installed in place. The invention can ensure the complete sealing of the engine oil filling port and effectively solve the problem of engine oil emulsification.)

1. The utility model provides an engine cylinder lid guard shield, includes cylinder lid guard shield (1) and adds machine oil mouth lid (2), its characterized in that: be formed with engine oil filler (11) on cylinder cap guard shield (1), install baffle subassembly (5) in engine oil filler (11), baffle subassembly (5) with the inner wall sliding fit of engine oil filler (11), baffle subassembly (5) can be followed the axial displacement of engine oil filler (11), add engine oil mouth lid (2) with baffle subassembly (5) threaded connection, be formed with engine oil filling passageway (54) on baffle subassembly (5), work as add after engine oil mouth lid (2) are installed in place add complete shutoff of engine oil mouth lid (2) engine oil filling passageway (54).

2. The engine head shroud of claim 1, wherein: the baffle plate assembly (5) comprises a sealing plate (55) and a sleeve portion (56), the sleeve portion (56) is in sliding fit with the engine oil filling opening (11), an internal thread (53) is formed on the sleeve portion (56), the sealing plate (55) is fixedly arranged at the bottom of the sleeve portion (56), and the sealing plate (55) and the sleeve portion (56) are coaxially arranged.

3. The engine head shroud of claim 2, wherein: add oil mouth lid (2) including outer shroud (21) and twist dress cylinder portion (22), the bottom surface of outer shroud (21) is formed with recess (23), the upper portion of twisting dress cylinder portion (22) sets firmly in recess (23), twist dress cylinder portion (22) with outer shroud (21) coaxial arrangement, the external diameter of machine oil filler (11) is less than the diameter of recess (23), it is equipped with and adds oil mouth lid sealing washer (3) to twist the cover on dress cylinder portion (22), the external diameter of twisting dress cylinder portion (22) equals the internal diameter of sleeve portion (56), it is formed with external screw thread (24) on dress cylinder portion (22) to twist.

4. The engine head shroud of claim 2, wherein: the end of the sleeve portion (56) connected to the seal plate (55) is formed with a plurality of the oil filling passages (54), and the oil filling passages (54) are arranged at equal intervals along the circumference of the sleeve portion (56).

5. The engine head shroud of claim 2, 3 or 4, wherein: the engine oil filling device is characterized in that a plurality of first strip-shaped grooves (12) and a plurality of second strip-shaped grooves (13) are formed in the inner wall of the engine oil filling opening (11), the first strip-shaped grooves (12) and the second strip-shaped grooves (13) are arranged along the axial direction of the engine oil filling opening (11), the lower end of the first strip-shaped grooves (12) is communicated with the bottom of the cylinder cover shield (1), the second strip-shaped grooves (13) extend from the top of the inner wall of the engine oil filling opening (11) to the middle lower portion of the inner wall of the engine oil filling opening (11), limiting ribs (51) matched with the first strip-shaped grooves (12) are formed in the outer wall of the sleeve portion (56), and limiting clamps (52) matched with the second strip-shaped grooves (13) are formed in the upper portion of the sleeve portion (56).

6. The engine head shroud of claim 5, wherein: the cylinder cover shield (1) body is arranged on the periphery of the engine oil filling port (11) and is provided with a sealing groove, and a sealing ring (4) is assembled in the sealing groove.

Technical Field

The invention relates to a protective cover, in particular to a protective cover of an engine cylinder cover.

Background

For satisfying engine lightweight design requirement, the cylinder cap guard shield is mostly the injection molding, inside integrated oil-gas separation device to arrange the machine oil filler in suitable position, filling machine oil when being convenient for auto repair maintenance. Under normal conditions, the cylinder cover protective cover is assembled with an engine oil inlet cover. When the engine oil needs to be filled, the engine oil can be filled by unscrewing the engine oil filling port cover. To facilitate oil filling, the oil fill port is typically in direct communication with the crankcase. As shown in fig. 1, in some main engine plants, in order to prevent foreign matter from falling into the crankcase 200 through the oil filling port 100, a baffle 300 is locally disposed at the position of the oil filling port 100. However, to ensure the smoothness of the oil charge 100, the baffle 300 does not completely close the oil charge port 100. Such a structure may cause an oil emulsification problem.

When the engine is running, the high-pressure combustible mixture and burned gas in the combustion chamber leak into the crankcase 200 through a gap between the piston group and the cylinder to a greater or lesser extent, causing blow-by. The blow-by gas is composed of unburned hydrocarbon, steam, exhaust gas, and the like. Because the cylinder cover shield 400 is an injection molding part, heat transfer is slow, and the temperature of the 100 parts of the engine oil filling opening rises slowly. When the vehicle runs for a short distance, because the temperature of the engine oil filling port 100 of the cylinder cover shield 400 is low, water vapor in blow-by gas is easy to condense and form water when meeting the engine oil filling port 100. Along with the operation of the engine, the engine oil splashes to the engine oil filling port 100 by the rotation of the timing chain or the camshaft, and is continuously attached and accumulated. The oil and the condensed water are fully mixed to form an oil emulsion.

Disclosure of Invention

The invention aims to provide an engine cylinder cover shield to solve the defects in the prior art, which can ensure that an engine oil filling port is completely sealed and can effectively solve the problem of engine oil emulsification.

The invention provides an engine cylinder cover shield which comprises a cylinder cover shield and an engine oil filling port cover, wherein an engine oil filling port is formed in the cylinder cover shield, a baffle assembly is arranged in the engine oil filling port and is in sliding fit with the inner wall of the engine oil filling port, the baffle assembly can move along the axial direction of the engine oil filling port, the engine oil filling port cover is in threaded connection with the baffle assembly, an engine oil filling channel is formed in the baffle assembly, and the engine oil filling port cover completely blocks the engine oil filling channel after the engine oil filling port cover is installed in place.

In the engine cylinder head protective cover, preferably, the baffle plate assembly includes a sealing plate and a sleeve portion, the sleeve portion is in sliding fit with the engine oil filling port, an internal thread is formed on the sleeve portion, the sealing plate is fixedly arranged at the bottom of the sleeve portion, and the sealing plate and the sleeve portion are coaxially arranged.

In the engine cylinder head protective cover, preferably, the engine oil feeding port cover comprises an outer cover cap and a screwing cylindrical portion, a groove is formed in the bottom surface of the outer cover cap, the upper portion of the screwing cylindrical portion is fixedly arranged in the groove, the screwing cylindrical portion and the outer cover cap are coaxially arranged, the outer diameter of the engine oil feeding port is smaller than the diameter of the groove, an engine oil feeding port cover sealing ring is sleeved on the screwing cylindrical portion, the outer diameter of the screwing cylindrical portion is equal to the inner diameter of the sleeve portion, and an external thread is formed on the screwing cylindrical portion.

In the engine head cover, preferably, a plurality of the oil filling passages are formed at one end of the sleeve portion connected to the seal plate, and the oil filling passages are arranged at equal intervals along the circumference of the sleeve portion.

In the engine cylinder head shield, preferably, a plurality of first strip-shaped grooves and a plurality of second strip-shaped grooves are formed in the inner wall of the engine oil filling port, the first strip-shaped grooves and the second strip-shaped grooves are both arranged along the axial direction of the engine oil filling port, the lower end of the first strip-shaped grooves is communicated with the bottom of the cylinder head shield, the second strip-shaped grooves extend from the top of the inner wall of the engine oil filling port to the middle lower part of the inner wall of the engine oil filling port, a limiting rib matched with the first strip-shaped grooves is formed on the outer wall of the sleeve portion, and a limiting clamp matched with the second strip-shaped grooves is formed on the upper part of the sleeve portion.

In the engine cylinder head protective cover, preferably, a sealing groove is formed around the engine oil filling port on the cylinder head protective cover body, and a sealing ring is assembled in the sealing groove.

Compared with the prior art, the cylinder cover comprises a cylinder cover protective cover and an engine oil filling port cover, an engine oil filling port is formed in the cylinder cover protective cover, a baffle assembly is installed in the engine oil filling port and is in sliding fit with the inner wall of the engine oil filling port, the baffle assembly can move along the axial direction of the engine oil filling port, the engine oil filling port cover is in threaded connection with the baffle assembly, an engine oil filling channel is formed in the baffle assembly, and the engine oil filling port cover is completely blocked after the engine oil filling port cover is installed in place. Through the setting of baffle subassembly, when opening with the machine oil mouth lid, the baffle subassembly is automatic whereabouts under the dead weight, and in machine oil can flow into the crankcase through machine oil filling passageway, when screwing up with the machine oil mouth lid, the baffle subassembly rises and makes the unable machine oil filling mouth that gets into that splashes of machine oil filling passageway with machine oil mouth lid complete shutoff machine oil filling passageway in, has effectively solved machine oil emulsification problem.

Drawings

FIG. 1 is a schematic structural view of a prior art head shroud;

FIG. 2 is a partial structural top view of the head shroud of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a half cross-sectional view of the head cover shield and baffle assembly of the present invention without the refueling oil port cap installed;

FIG. 5 is a bottom view of the cylinder head shroud of the present invention;

FIG. 6 is an isometric view of the baffle assembly of the present invention.

Description of reference numerals:

in fig. 1: 100-engine oil filling port, 200-crankcase, 300-baffle and 400-cylinder cover shield;

in fig. 2-6: 1-cylinder cover shield, 11-engine oil filling port, 12-first strip-shaped groove, 13-second strip-shaped groove, 2-engine oil filling port cover, 21-outer cover cap, 22-screwing cylindrical part, 23-groove, 24-external thread, 3-engine oil filling port cover sealing ring, 4-sealing ring, 5-baffle component, 51-limiting rib, 52-limiting clamp, 53-internal thread, 54-engine oil filling channel, 55-sealing plate and 56-sleeve part.

Detailed Description

The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.

The embodiment of the invention comprises the following steps: as shown in fig. 1-6, an engine cylinder head protective cover comprises a cylinder head protective cover 1 and an engine oil adding port cover 2, an engine oil adding port 11 is formed on the cylinder head protective cover 1, a baffle plate assembly 5 is installed in the engine oil adding port 11, the baffle plate assembly 5 is in sliding fit with the inner wall of the engine oil adding port 11, the engine oil adding port cover 2 is in threaded connection with the baffle plate assembly 5, an engine oil adding passage 54 is formed on the baffle plate assembly 5, the baffle plate assembly 5 has two working positions, when the engine oil adding port cover 2 is installed, the baffle plate assembly 5 moves to a first working position along the engine oil adding port 11 under the action of threaded fit, when the engine oil adding port cover 2 is installed in place, the engine oil adding port cover 2 completely blocks the engine oil adding passage 54, splashed engine oil cannot enter the engine oil adding port 11, when the engine oil adding port cover 2 is detached, the baffle plate assembly 5 moves downwards to a second working position under the action of self weight, the oil filling passage 54 is open and communicates the oil filling port 11 with the crankcase, so that oil can be filled into the crankcase.

By means of the structural design, the engine oil can not splash and adhere to and gather in the engine oil filling port 11 along with the rotation of the timing chain or the camshaft in the operation process of the engine, water vapor can not be condensed in the engine oil filling port 11, and meanwhile, the oil filling at the time of maintenance of the whole vehicle is not influenced, so that the problem of engine oil emulsification at the engine oil filling port of the cylinder cover shield is solved.

In a specific embodiment, the baffle plate assembly 5 comprises a sealing plate 55 and a sleeve portion 56, wherein the sleeve portion 56 is of a cylindrical structure, the sleeve portion 56 is in sliding fit with the oil filling port 11, an internal thread 53 is formed on the sleeve portion 56, the sealing plate 55 is fixedly arranged at the bottom of the sleeve portion 56, and the sealing plate 55 and the sleeve portion 56 are coaxially arranged. A sealing groove is arranged around an engine oil filling port 11 on the body of the cylinder cover shield 1, and a sealing ring 4 is assembled in the sealing groove.

It is also conceivable to provide a labyrinth rib instead of the seal ring 4, in order to seal the oil filling opening 11 after screwing the oil filling opening cover 2, and to prevent oil droplets and water vapor splashed in the crankcase from entering the area of the oil filling opening 11.

Further, the oil adding port cover 2 comprises an outer cover cap 21 and a screwing cylindrical portion 22, a groove 23 is formed in the bottom surface of the outer cover cap 21, the upper portion of the screwing cylindrical portion 22 is fixedly arranged in the groove 23, the screwing cylindrical portion 22 and the outer cover cap 21 are coaxially arranged, the outer diameter of the oil adding port 11 is smaller than the diameter of the groove 23, an oil adding port cover sealing ring 3 is sleeved on the screwing cylindrical portion 22, the outer diameter of the screwing cylindrical portion 22 is equal to the inner diameter of the sleeve portion 56, and external threads 24 are formed on the screwing cylindrical portion 22.

Further, a plurality of oil filling passages 54 are formed at one end of the sleeve portion 56 connected to the seal plate 55, and the oil filling passages 54 are arranged at equal intervals along the circumference of the sleeve portion 56. A plurality of first strip-shaped grooves 12 and a plurality of second strip-shaped grooves 13 are formed in the inner wall of the engine oil filling port 11, the first strip-shaped grooves 12 and the second strip-shaped grooves 13 are arranged along the axial direction of the engine oil filling port 11, the lower ends of the first strip-shaped grooves 12 are communicated with the bottom of the cylinder head shield 1, the second strip-shaped grooves 13 extend from the top of the inner wall of the engine oil filling port 11 to the middle lower part of the inner wall of the engine oil filling port 11, limiting ribs 51 matched with the first strip-shaped grooves 12 are formed in the outer wall of the sleeve portion 56, and limiting clamps 52 matched with the second strip-shaped grooves 13 are formed in the upper part of the sleeve portion 56.

The first strip-shaped groove 12 is mainly used for being matched with a limiting rib 51 on the sleeve portion 56 to prevent the sleeve portion 56 from rotating along with the screwing process of the oil filler cover 2; the provision of the second strip-like groove 13 prevents the boss portion 56 from being detached from the head shroud 1.

Besides, in addition to the above embodiments, the sleeve portion 56 may also be designed to be a polygonal-shaped sleeve structure, so that the sleeve portion 56 is effectively prevented from following and being separated during the process of screwing the engine oil filler cover 2, and the cylinder head protective cover 1 is structurally adapted, specifically designed according to the layout boundary and the requirement.

The use method of the invention comprises the following steps: in the process of screwing the oil filler cover 2 of the cylinder head protective cover 1, the external thread 23 on the oil filler cover 2 is firstly contacted with the internal thread 53 of the sleeve part 56 for pre-screwing, the sleeve part 56 does not rotate under the action of the limiting rib 51, and the sleeve part 56 moves upwards in the engine oil filling port 11 along with the screwing of the oil filler cover 2 until the sealing plate 55 is attached to the sealing ring 4, and at the moment, the baffle plate assembly is located at the first working position to completely close the engine oil filling port 11. At the moment, the engine oil splashed during the operation of the engine cannot enter the engine oil filling port 11 because the sealing plate 55 seals the engine oil filling port 11, so that the problem of engine oil emulsification is solved, meanwhile, the engine oil filling port 11 realizes double sealing, and the reliability is improved. After the engine oil filling opening cover 2 is unscrewed, the baffle plate assembly 5 moves downwards in the engine oil filling opening 11 due to the action of self gravity and the like, at the moment, the limiting clamp 52 is positioned at the bottom of the second strip-shaped groove 13, the engine oil filling channel 54 is completely opened, and the filled engine oil passes through the engine oil filling opening 11 and the engine oil filling channel 54 in sequence and finally flows into a crankcase.

The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.