Engine

Abstract

The utility model discloses an engine which comprises a box body, the box body is connected with an air cylinder body, the box body is connected with a box cover through a flange, a sealing gasket is arranged between the flange face of the box body and the flange face of the box cover, and the sealing gasket comprises a first sealing area and a second sealing area. The relative slippage amount of the box body and the box cover at the first sealing area is larger than the relative slippage amount of the box body and the box cover at the second sealing area, and the first sealing area of the sealing gasket is arranged in a sunken mode towards the middle of the flange face of the box body along the inner side outline or the outer side outline of the projection perpendicular to the flange face of the box body to form a sunken area. According to the scheme, the problem that leakage occurs due to the fact that a sealing gasket between a box body and a box cover of an engine in the prior art is prone to damage is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an engine. BACKGROUND

[0002] The existing engine includes a box body, a cylinder block and a box cover and other shell components for supporting moving parts, the cylinder block is integrally formed with the box body, the box cover is located at the side of the cylinder block and is connected with the box body through a flange matched with each other, and a sealing gasket is further arranged at the flange matched surface between the box body and the box cover for sealing. In actual design, in order to make the inner and outer surfaces of the entire engine shell relatively smooth, the size and shape of the flange surface on the box body are completely the same as those of the flange surface on the box cover, and the size and shape of the sealing gasket are also the same as those of the flange surface. It is found in actual use that relative sliding exists at the flange matched surface of the box body and the box cover, and the distribution of the relative sliding amount at the flange matched surface of the box body and the box cover is uneven, and the relative sliding amount in some local areas is larger than that in other areas. The sealing gasket located at the area with larger relative sliding amount of the box body and the box cover is prone to damage and leakage.

[0003] Chinese patent document CN221256953U discloses a high sealing performance crankcase, comprising an upper crankcase body, a lower crankcase body, an upper sealing boss and a lower sealing boss, the lower crankcase body is arranged below the upper crankcase body, the inside of the lower crankcase body is provided with a lower shaft hole, the inside of the upper crankcase body at the position of the lower shaft hole is provided with an upper shaft hole, the upper shaft hole corresponds to the lower shaft hole, the edge position of the surface of the lower crankcase body is provided with a first sealing groove, the inside of the first sealing groove is adhered with a first sealing ring, the lower sealing boss is arranged on the surface of the lower crankcase body at one side of the first sealing groove, the edge position of the surface of the upper crankcase body is provided with a second sealing groove, the inside of the second sealing groove is adhered with a second sealing ring, the second sealing ring is tightly combined with the lower sealing boss, the upper sealing boss is arranged on the surface of the upper crankcase body at one side of the second sealing groove, the upper sealing boss is tightly combined with the first sealing ring, the outside of the lower shaft hole is fixed with a lower shaft sleeve, the surface of the lower shaft sleeve is provided with a lower inner ring groove, the inside of the lower inner ring groove is adhered with a lower inner sealing gasket, the outside of the upper shaft hole is fixed with an upper shaft sleeve, the surface of the upper shaft sleeve is provided with an upper outer ring groove, the inside of the upper outer ring groove is adhered with an upper outer sealing gasket. The prior art adopts a concave-convex double sealing structure, the upper sealing boss of the surface of the upper crankcase body is clamped into the inside of the first sealing groove and presses the first sealing ring, the lower sealing boss is clamped into the inside of the second sealing groove and presses the second sealing ring, and the sealing performance at the connecting position of the upper and lower crankcase bodies is improved.

[0004] Although the prior art achieves the improvement of the sealing performance of the engine crankcase, the technical means adopted is to set multiple sealing grooves and sealing bosses at the connecting part of the upper and lower housings of the crankcase, thereby causing the machining difficulty to be significantly improved, which is not conducive to the production operation. Utility model content

[0005] The utility model discloses an engine, which solves the problem that the sealing gasket between the housing and the cover of the engine in the prior art is prone to damage and leakage.

[0006] In order to achieve the above-mentioned purpose, the basic scheme of the utility model provides an engine, which comprises a housing, the housing is connected with a cylinder block, the housing flange is connected with a cover, a sealing gasket is arranged between the flange surface of the housing and the flange surface of the cover, the sealing gasket comprises a first sealing area and a second sealing area, the relative sliding amount of the housing and the cover at the first sealing area is greater than that at the second sealing area, and the first sealing area of the sealing gasket is recessed towards the middle part of the flange surface of the housing along the inner side contour or the outer side contour perpendicular to the projection of the flange surface of the housing to form a recessed area.

[0007] The beneficial effects of the basic scheme are that, by adopting the scheme, the flange surface edge of the housing or the cover is not easy to cause damage to the edge of the sealing gasket at the area where the relative sliding amount of the housing and the cover is large, thereby being conducive to reducing the leakage caused by the damage of the sealing gasket, and the face pressure between the flange surface of the housing and the flange surface of the cover and the sealing gasket can be increased, and the sealing performance of the engine is further improved.

[0008] Preferably, the width of the recessed area is at least 5% of the width of the flange surface of the housing corresponding to the first sealing area. By adopting such a setting, the sealing performance of the engine can be further improved.

[0009] Preferably, the first sealing area of the sealing gasket is recessed towards the middle part of the flange surface of the housing along the outer side contour and the inner side contour perpendicular to the projection of the flange surface of the housing. By adopting such a setting, the inner side and the outer side edge of the first sealing area of the sealing gasket are not easy to be damaged by the flange surface edge of the housing, thereby being conducive to further improving the reliability of the sealing gasket and further improving the sealing performance of the engine.

[0010] Preferably, the first sealing area is located at the area close to the cylinder block of the housing. The relative sliding amount between the area close to the cylinder block of the housing and the cover is large, and the first sealing area is arranged in the area, thereby being conducive to further improving the sealing performance of the engine.

[0011] Preferably, the box is provided with a reinforcing rib on the side close to the box flange surface, and the reinforcing rib is connected with the cylinder body. With such arrangement, the flange rigidity of the box in the area close to the cylinder body can be increased, so that the amount of slippage between the box and the box cover can be reduced, and the damage of the sealing gasket caused by the edge of the flange surface can be reduced, and the sealing performance of the engine can be improved.

[0012] The utility model has the advantages of:

[0013] 1. The arrangement can reduce the damage of the sealing gasket caused by the edge of the flange surface when the box and the box cover slip relative to each other, so that the leakage caused by the damage of the sealing gasket can be reduced, and the sealing performance of the engine can be improved.

[0014] 2. The reinforcing rib can increase the rigidity of the side of the box close to the flange surface, so that the amount of slippage between the box and the box cover close to the cylinder body can be reduced, the damage of the sealing gasket caused by the edge of the flange surface can be further reduced, the leakage caused by the damage of the sealing gasket can be further reduced, and the sealing performance of the engine can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic view of an embodiment of the utility model of an engine;

[0016] Figure 2 is Figure 1 a front view of the flange surface of the box and the sealing gasket;

[0017] Figure 3 is Figure 2 a local enlarged view of A. DETAILED DESCRIPTION

[0018] The following will be further described in detail through specific embodiments:

[0019] The reference signs in the drawings of the specification include: box 1, box flange surface 2, first sealing area 31, second sealing area 32, cylinder body 4, reinforcing rib 5.

[0020] The embodiment is basically as shown in the accompanying Figure 1 , Figure 2 and Figure 3As shown: an engine, comprising a box 1, the box 1 is connected with a cylinder body 4. In this embodiment, the cylinder body 4 is arranged obliquely and is integrally formed with the upper part of the box 1. The box 1 is connected with a box cover (not shown) on the side of the cylinder body 4. A sealing gasket is arranged between the box flange surface 2 of the box 1 and the flange surface of the box cover. The box flange surface 2 and the flange surface of the box cover are the same in shape and size. The sealing gasket comprises a first sealing area 31 and a second sealing area 32. The relative sliding amount of the box 1 and the box cover at the first sealing area 31 is greater than that at the second sealing area 32. The inner side contour or the outer side contour of the first sealing area 31 along the projection perpendicular to the box flange surface 2 is recessed towards the middle part of the box flange surface 2 to form a recessed area. The width of the recessed area is at least 5% of the width of the corresponding box flange surface 2 of the first sealing area 31.

[0021] In this embodiment, it is preferred that the outer side contour and the inner side contour of the first sealing area 31 of the sealing gasket are both recessed towards the middle part of the box flange surface 2, so that the inner and outer edges of the sealing gasket at the first sealing area 31 are narrowed towards the middle part of the box flange surface 2, and the width of the sealing gasket at the first sealing area 31 is smaller than the width of the corresponding box flange surface 2. After the box cover is connected with the box 1, there is a certain gap between the inner and outer edges of the first sealing area 31 of the sealing gasket and the inner and outer edges of the box flange surface 2, which is beneficial to further avoid the damage of the edges of the box flange surface 2 to the edges of the sealing gasket, and can also increase the surface pressure between the box flange surface 2, the flange surface of the box cover and the sealing gasket, thereby improving the sealing effect. In this embodiment, the width L2 of the region of the first sealing area 31 of the sealing gasket close to the cylinder body 4 is reduced by a proportion of not less than 5% relative to the width L1 of the box flange surface 2, such as 6%, 7%, 8% and the like.

[0022] In this embodiment, the first sealing area 31 is located at the region of the box 1 close to the cylinder body 4. A reinforcing rib 5 is arranged on the box 1 at the side close to the flange surface 2 of the box 1, and the reinforcing rib 5 is connected with the cylinder body 4. In this embodiment, the reinforcing rib 5 is integrally formed with the box 1 and the cylinder body 4. The reinforcing rib 5 is arranged extending along the flange surface 2 of the box 1.

[0023] By using this scheme, when the box 1 and the box cover slide relative to each other, the damage of the edges of the flange surface 2 to the sealing gasket can be reduced, thereby reducing the leakage phenomenon caused by the damage of the sealing gasket and improving the sealing performance of the engine. At the same time, through the arrangement of the reinforcing rib 5, the stiffness of the side of the box 1 close to the flange surface 2 is enhanced, thereby reducing the relative sliding amount of the flange fitting surface between the box 1 and the box cover at the position close to the cylinder body 4 of the box 1, which is beneficial to further reduce the damage of the edges of the flange surface 2 to the edges of the sealing gasket, thereby further reducing the leakage phenomenon caused by the damage of the sealing gasket and improving the sealing performance of the engine.

[0024] The above is only the embodiment of the present application, and the well-known specific structure and characteristics and other common knowledge in the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application.

Claims

1. An engine comprising a case to which a cylinder block is attached, a case cover flanged to the case, a gasket provided between a case flange surface of the case and a flange surface of the case cover, the gasket comprising a first sealing region and a second sealing region, the amount of relative displacement of the case and the case cover at the first sealing region being greater than the amount of relative displacement at the second sealing region, characterized in that: The first sealing area of the gasket is recessed towards the middle of the flange face of the cylinder head along the inner or outer profile perpendicular to the projection of the flange face of the cylinder head to form a recessed area.

2. An engine as claimed in claim 1, wherein: The width of the recessed area is at least 5% of the width of the flange face of the cylinder head corresponding to the first sealing area.

3. An engine as claimed in claim 2, wherein: The first sealing area of the gasket is recessed towards the middle of the flange face of the cylinder head along the inner or outer profile perpendicular to the projection of the flange face of the cylinder head to form a recessed area.

4. An engine as claimed in claim 3, wherein: The first sealing area is located at the area of the cylinder head close to the cylinder block.

5. An engine as claimed in claim 4, wherein: A reinforcing rib is arranged on the cylinder head at the side close to the flange face of the cylinder head, and the reinforcing rib is connected with the cylinder block.

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