Crankcase right cover and engine

Abstract

The utility model relates to the technical field of engines, and discloses a right cover of a crankcase, the top of a crankcase cover body extends upwards to be provided with an installation boss used for connecting and fastening a silencer, the installation boss is provided with a connecting hole, the upper portion of the outer side face of the crankcase cover body is provided with a vertical wall protruding outwards, and the vertical wall is provided with a connecting hole. A mounting boss is arranged on the right cover body, a first reinforcing rib, a second reinforcing rib and a third reinforcing rib which are distributed in a divergent mode are arranged on the periphery of the mounting boss, the second reinforcing rib is clamped between the first reinforcing rib and the third reinforcing rib, and the first reinforcing rib is located on the side close to a rear wheel fender. By the adoption of the silencer, deformation of the right cover of the crankcase caused by the silencer can be reduced, and it is guaranteed that the right cover of the crankcase is good in sealing performance on the crankcase body.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a right crankcase cover and an engine. Background Art

[0002] In the crankcase of a scooter engine, it is filled with engine oil for lubrication and cooling. The right crankcase cover needs to seal the engine oil in the crankcase. At the same time, a hanging plate structure for fixing the muffler is installed on the upper part of the right crankcase cover, and the muffler is suspended on the right crankcase cover, which is likely to cause deformation of the right crankcase cover and affect the sealing effect of the right crankcase cover on the engine oil. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a right crankcase cover and an engine, which can reduce the deformation of the right crankcase cover caused by the muffler and ensure good sealing performance of the right crankcase cover on the crankcase body.

[0004] To achieve the above purpose, one aspect of the utility model provides a right crankcase cover. A crankshaft hole is provided on the cover body. An installation boss for connecting and fastening the muffler extends upward from the top of the cover body. A connection hole is provided on the installation boss. An upright wall protruding outward is provided on the upper part of the outer side surface of the cover body. First reinforcing ribs, second reinforcing ribs and third reinforcing ribs distributed in a divergent manner are provided on the outer periphery of the installation boss. The second reinforcing rib is clamped between the first reinforcing rib and the third reinforcing rib. The first reinforcing rib is located on the side close to the rear fender.

[0005] As a preferred solution of the utility model, a connection ear for connecting and fastening the rear fender extends from the upper end surface of the first reinforcing rib toward the side of the rear fender.

[0006] As a preferred solution of the utility model, a first reinforcing rib is connected between the third reinforcing rib and the upright wall, and the first reinforcing rib is perpendicular to the third reinforcing rib.

[0007] As a preferred solution of the utility model, the extension line of the second reinforcing rib passes through the center point of the connection hole, and the second reinforcing rib is perpendicular to the upright wall.

[0008] As a preferred solution of the utility model, a fourth reinforcing rib is provided between the upright wall and the outer side surface of the trigger installation groove on the cover body.

[0009] As a preferred solution of the utility model, the fourth reinforcing rib is perpendicular to the upright wall.

[0010] As a preferred embodiment of the present utility model, a plurality of fixing holes for fixing the lid body to the crankcase body are provided on the outer periphery of the lid body, and a fifth reinforcing rib is provided between the fixing hole on the upper right side of the outer side surface of the lid body and the vertical wall.

[0011] As a preferred embodiment of the present utility model, the fifth reinforcing rib is perpendicular to the vertical wall.

[0012] As a preferred embodiment of the present utility model, a sixth reinforcing rib is provided on the inner side surface of the lid body, connecting the connection hole and the fixing hole located on the right side of the mounting boss and adjacent to the vertical wall.

[0013] As a preferred embodiment of the present utility model, a second reinforcing rib is provided on the inner side surface of the lid body, connecting the starting idler gear mounting hole and the mounting boss.

[0014] In addition, another aspect of the present utility model provides an engine, including a crankcase, and the crankcase includes a body and the right crankcase cover as described above.

[0015] Compared with the prior art, the right crankcase cover and the engine of the embodiment of the present utility model have the following beneficial effects:

[0016] In the present utility model, the first reinforcing rib, the second reinforcing rib and the third reinforcing rib are arranged in a divergent shape between the mounting boss and the vertical wall, which effectively improves the structural strength between the mounting boss and the lid body, ensures good force-bearing effect of the mounting boss, greatly reduces the deformation of the right crankcase cover caused by the muffler hanging on the right crankcase cover, and further improves the sealing performance of the right crankcase cover on the crankcase body, prevents the leakage of crankcase oil, and the optimized structure is simple and does not require changing the main structure of the right crankcase cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings of the embodiments will be briefly introduced below.

[0018] Figure 1 FIG. is a schematic structural diagram of the outer side surface of a right crankcase cover provided by the present utility model;

[0019] Figure 2 FIG. is a schematic structural diagram of the inner side surface of a right crankcase cover provided by the present utility model;

[0020] Figure 3 FIG. is a schematic connection structural diagram of the crankcase, the muffler and the rear wheel mudguard provided by the present utility model;

[0021] Figure 4 FIG. is a schematic connection structural diagram of the crankcase and the rear wheel mudguard provided by the present utility model;

[0022] Figure 5 A structural schematic diagram of an engine provided by the present utility model;

[0023] Figure 6 is Figure 5 The sectional view taken along the line A-A in

[0024] In the figure, the cover body 1; the mounting boss 2; the muffler 3; the rear wheel mudguard 4; the crankshaft hole 5; the connection hole 6; the vertical wall 7; the first reinforcing rib 8; the second reinforcing rib 9; the third reinforcing rib 10; the connecting ear 11; the fourth reinforcing rib 12; the trigger mounting groove 13; the box body 14; the fixing hole 15; the fifth reinforcing rib 16; the sixth reinforcing rib 17; the connecting groove 18; the positioning groove 19; the rubber sleeve mounting groove 20; the first mounting hole position 21; the second mounting hole position 22; the third mounting hole position 23; the seventh reinforcing rib 24; the reinforcing arc rib 25; the eighth reinforcing rib 26; the first reinforcing ring rib 27; the starting idler wheel mounting hole 28; the ninth reinforcing rib 29; the tenth reinforcing rib 30; the second reinforcing ring rib 31; the eleventh reinforcing rib 32; the first reinforcing rib 33; the second reinforcing rib 34; the magneto 35; the fan 36; the fan cover 37. Specific embodiments

[0025] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0027] As Figures 1 to 4 shown, a right crankcase cover of a preferred embodiment of the present utility model includes a cover body 1, a crankshaft hole 5 is provided on the cover body 1, a mounting boss 2 for connecting and fastening the muffler 3 extends upward from the top of the cover body 1, a connection hole 6 is provided on the mounting boss 2, an outer upper portion of the outer side surface of the cover body 1 is provided with a vertically protruding vertical wall 7, a first reinforcing rib 8, a second reinforcing rib 9 and a third reinforcing rib 10 which are distributed in a divergent shape are provided on the outer periphery of the mounting boss 2, the second reinforcing rib 9 is clamped between the first reinforcing rib 8 and the third reinforcing rib 10, and the first reinforcing rib 8 is located on the side close to the rear wheel mudguard 4.

[0028] Between the mounting boss 2 and the vertical wall 7 of the present utility model, the first reinforcing rib 8, the second reinforcing rib 9 and the third reinforcing rib 10 are arranged in a divergent manner, which effectively improves the structural strength between the mounting boss 2 and the cover body 1 of the box, ensures good stress effect of the mounting boss 2, greatly reduces the deformation of the right crankcase cover caused by the muffler 3 hanging on the right crankcase cover, and further improves the sealing performance of the right crankcase cover on the crankcase body 14, prevents the leakage of crankcase oil, and the optimized structure is simple without changing the main structure of the right crankcase cover.

[0029] Exemplarily, on the upper end face of the first reinforcing rib 8 extending towards one side of the rear fender 4, a connecting ear 11 for connecting and fastening the rear fender 4 is provided. There is no need to separately make a fender boss structure for mounting the rear fender. The connecting ear 11 is directly combined with the first reinforcing rib 8, making the manufacturing process of the connecting ear 11 simpler, making the layout of the right crankcase cover more compact, being beneficial to the miniaturization and light weight of the crankcase. Moreover, the connecting ear 11 is arranged on the first reinforcing rib 8, which can also effectively enhance the structural strength between the connecting ear 11 and the main body of the right crankcase cover.

[0030] Further, a first reinforcing rib 33 is connected between the third reinforcing rib 10 and the vertical wall 7. The first reinforcing rib 33 is perpendicular to the third reinforcing rib 10, which can further strengthen the rigidity of the mounting boss 2.

[0031] As Figure 1 shown, to further improve the supporting effect of the mounting boss 2 on the muffler 3, the extension line of the second reinforcing rib 9 passes through the center point of the connecting hole 6, and the second reinforcing rib 9 is perpendicular to the vertical wall 7, which can effectively increase the tensile strength of the mounting boss 2.

[0032] Preferably, a fourth reinforcing rib 12 is provided between the vertical wall 7 and the outer side surface of the trigger mounting groove 13 on the cover body 1 of the box. Specifically, the fourth reinforcing rib 12 is perpendicular to the vertical wall 7, which can enhance the structural strength of the trigger mounting groove 13.

[0033] In this embodiment, a plurality of fixing holes 15 for fixing the cover body 1 of the box on the crankcase body 14 are provided on the outer periphery of the cover body 1 of the box. A fifth reinforcing rib 16 is provided between the fixing hole 15 on the upper right side of the outer side surface of the cover body 1 of the box and the vertical wall 7. Further, the fifth reinforcing rib 16 is perpendicular to the vertical wall 7, which improves the strength of the fixing hole 15 at the edge of the cover body 1 of the box. At the same time, the second reinforcing rib 9, the fourth reinforcing rib 12 and the fifth reinforcing rib 16 are all connected to the vertical wall 7 and are all perpendicular to the vertical wall 7, which plays a supporting role for the vertical wall 7 and effectively strengthens the structural strength of the vertical wall 7.

[0034] As Figure 2As shown, exemplarily, a sixth reinforcing rib 17 is provided on the inner side surface of the lid body 1, which is connected between the connection hole 6 and the fixing hole 15 located on the right side of the mounting boss 2 and close to the vertical wall 7. The sixth reinforcing rib 17 can strengthen the structural strength of the top of the lid body 1, and at the same time increase the structural strength of the mounting boss 2, avoiding deformation of the mounting boss 2 caused by the installation and connection of the muffler 3.

[0035] Exemplarily, a second reinforcing rib 34 is provided on the inner side surface of the lid body 1, which is connected between the starting idler pulley mounting hole 28 and the mounting boss 2, further optimizing the structural strength of the mounting boss 2 and avoiding deformation of the right crankcase cover caused by the suspension of the muffler 3.

[0036] As Figures 5 to 6 shown, in this embodiment, a connection groove 18 for clamping and cooperating with the upper part of the fan cover 37 is provided at the top of the vertical wall 7, and a positioning groove 19 for clamping and cooperating with the lower part of the fan cover 37 is provided on the cover body. By designing the connection groove 18 for cooperating with the upper part of the fan cover 37 and the positioning groove 19 for cooperating with the lower part of the fan cover 37, the fan cover 37 is clamped on the connection groove 18 and the positioning groove 19. The connection groove 18 can prevent the upper part of the fan cover 37 from deforming inward, and the positioning groove 19 can prevent the lower part of the fan cover 37 from deforming inward and outward, effectively avoiding deformation when the fan cover 37 with a cylindrical thin-wall structure is installed on the right crankcase cover and ensuring the cooling effect of the fan 36 on the crankcase; a rubber sleeve installation groove 20 for clamping the magneto 35 wire harness rubber sleeve is provided on the vertical wall 7, the third reinforcing rib 10 extends towards the side of the rubber sleeve installation groove 20, a first installation hole position 21 for fixing the fan cover 37 is provided on the third reinforcing rib 10, the first installation hole position 21 is arranged at one end of the third reinforcing rib 10 close to the vertical wall 7, a second installation hole position 22 for fixing the fan cover 37 is provided at the lower part of the cover body, and a third installation hole position 23 for fixing the fan cover 37 is provided on the lid body 1. The third reinforcing rib 10 can not only strengthen the structural strength between the mounting boss 2 and the vertical wall 7, but also make the first installation hole position 21 arranged close to the rubber sleeve installation groove 20, so that the bolt fixing points of the fan cover 37 are as close as possible to the rubber sleeve installation groove 20, which can increase the pressing force of the fan cover 37 on the magneto 35 wire harness rubber sleeve and ensure good fixing effect of the magneto 35 wire harness rubber sleeve, preventing the magneto 35 wire harness rubber sleeve from bulging or misaligning during actual use.

[0037] As Figure 1As shown, further, a seventh reinforcing rib 24 is provided on the outer side surface of the cover body, extending from the crankshaft hole 5 to the bottom fixing hole 15 in the cover body. The positioning groove 19 is arranged on the seventh reinforcing rib 24. Since the seventh reinforcing rib 24 itself is a convex structure, it is convenient to arrange the positioning groove 19 on the seventh reinforcing rib 24, optimizing the layout of the structure on the cover body. A reinforcing arc rib 25 is provided on the outer side surface of the cover body. The reinforcing arc rib 25 forms the side wall of the positioning groove 19 on the side close to the crankshaft hole 5. The shape of the reinforcing arc rib 25 matches the shape of the lower inner cavity wall of the fan cover 37. The reinforcing arc rib 25 can effectively support the lower inner cavity wall of the reinforcing arc rib 25 and the fan cover 37, effectively preventing the fan cover 37 from deforming and affecting the cooling effect of the fan 36.

[0038] As Figures 1 to 2As shown, a plurality of eighth reinforcing ribs 26 which are divergently distributed on the outer periphery of the crankshaft hole 5 are provided on the outer side surface of the cover body. One end of the eighth reinforcing rib 26 is connected to the crankshaft hole 5, and the other end of the eighth reinforcing rib 26 is connected to one of the fixing holes 15. A first reinforcing ring rib 27 which is coaxially arranged with the crankshaft hole 5 is provided on the outer side surface of the cover body. The first reinforcing ring rib 27 penetrates through the middle parts of all the seventh reinforcing ribs 24 and all the eighth reinforcing ribs 26. In addition, a starting idler wheel mounting hole 28 is provided on the inner side surface of the cover body. The eighth reinforcing rib 26 further includes a reinforcing rib connected between the crankshaft hole 5 and the outer side surface of the starting idler wheel mounting hole 28. A ninth reinforcing rib 29 is provided between the inner side surface of the crankshaft hole 5 and the inner side surface of the trigger mounting groove 13 on the crankcase body 1. A plurality of tenth reinforcing ribs 30 which are divergently distributed on the outer periphery of the crankshaft hole 5 are provided on the inner side surface of the cover body. One end of the tenth reinforcing rib 30 is connected to the crankshaft hole 5, and the other end of the tenth reinforcing rib 30 is connected to one of the fixing holes 15. In addition, the tenth reinforcing rib 30 further includes a reinforcing rib connected between the crankshaft hole 5 and the inner side surface of the starting idler wheel mounting hole 28. A second reinforcing ring rib 31 which is coaxially arranged with the crankshaft hole 5 is provided on the inner side surface of the cover body. The second reinforcing ring rib 31 penetrates through the middle parts of all the ninth reinforcing ribs 29 and all the tenth reinforcing ribs 30. An eleventh reinforcing rib 32 is provided on the inner side surface of the cover body. The eleventh reinforcing rib 32 is connected between two of the fixing holes 15 on the left and right sides of the lower part of the cover body. The structural strength of the lower part of the cover body is effectively enhanced through the eleventh reinforcing rib 32. Since a magneto 35 needs to be installed on the outer side surface of the right crankcase cover, and the magneto 35 is heavy, the magneto 35 is likely to cause deformation of the right crankcase cover. When the crankshaft rotates at a high speed, due to the influence of the crankshaft deflection and the deformation of the right crankcase cover, the rotor of the magneto 35 is likely to generate high-frequency whistling sounds. By providing the seventh reinforcing ribs 24, eighth reinforcing ribs 26, and first reinforcing ring rib 27 on the outer side surface of the cover body, and by providing the ninth reinforcing ribs 29 and tenth reinforcing ribs 30 on the inner side surface of the cover body, thus reinforcing structures corresponding to the position of the magneto 35 are provided on both the inner and outer side surfaces of the right crankcase cover, and the deformation of the right crankcase cover caused by the heavy magneto 35 is reduced as much as possible.

[0039] In addition, the present utility model also provides an engine, which includes a crankcase, a magneto 35, a fan 36 and a fan cover 37. The crankcase includes a box body 14 and the right crankcase cover described above. The right crankcase cover is installed on the right side of the box body 14. The magneto 35 is installed on the right crankcase cover. The fan 36 is arranged on the magneto 35. The fan cover 37 is installed on the right side of the crankcase and the magneto 35 and the fan 36 are arranged in the inner cavity of the fan cover 37. Since the engine is provided with the above-mentioned right crankcase cover, it has all the beneficial effects of the above-mentioned right crankcase cover, and will not be described one by one here.

[0040] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0041] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present utility model.

Claims

1. A right crankcase cover, comprising a cover body, wherein the cover body is provided with a crankshaft hole, characterized in that: The top of the box cover body extends upward to form a mounting boss for connecting and fastening the muffler, the mounting boss is provided with a connecting hole, the upper part of the outer side surface of the box cover body is provided with a vertical wall protruding outward, the outer periphery of the mounting boss is provided with a first reinforcing rib, a second reinforcing rib and a third reinforcing rib distributed in a divergent manner, the second reinforcing rib is clamped between the first reinforcing rib and the third reinforcing rib, and the first reinforcing rib is located on the side close to the rear wheel fender.

2. The crankcase right cover according to claim 1, characterized in that: A connecting ear portion for connecting and fastening the rear wheel fender is extended from the upper end surface of the first reinforcing rib toward one side of the rear wheel fender.

3. The crankcase right cover according to claim 1, characterized in that: A first reinforcing rib is connected between the third reinforcing rib and the vertical wall, and the first reinforcing rib is perpendicular to the third reinforcing rib.

4. The crankcase right cover according to claim 1, characterized in that: An extension line of the second reinforcing rib passes through a center point of the connecting hole, and the second reinforcing rib is perpendicular to the vertical wall.

5. The crankcase right cover according to claim 1, characterized in that: A fourth reinforcing rib is provided between the vertical wall and the outer side surface of the trigger mounting groove on the box cover body; the fourth reinforcing rib is perpendicular to the vertical wall.

6. The crankcase right cover according to claim 1, characterized in that: The outer periphery of the case cover body is provided with a plurality of fixing holes for fixing the case cover body to the case body of the crankcase, and a fifth reinforcing rib is provided between the fixing holes on the right upper side of the outer side surface of the case cover body and the vertical wall.

7. The right crankcase cover according to claim 6, characterized in that: The fifth reinforcing rib is perpendicular to the vertical wall.

8. The right crankcase cover according to claim 6, characterized in that: A sixth reinforcing rib connected between the connecting hole and a fixing hole located on the right side of the mounting boss and close to the vertical wall is provided on the inner side surface of the box cover body.

9. The crankcase right cover according to claim 6, characterized in that: A second reinforcing rib connected between the starting idler wheel mounting hole and the mounting boss is provided on the inner side surface of the box cover body.

10. An engine, characterized in that: The invention comprises a crankcase, wherein the crankcase comprises a case body and a right crankcase cover as claimed in any one of claims 1 to 9.

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