Side cover structure of motorcycle engine

Abstract

The utility model belongs to the technical field of motorcycle engine relates to a motorcycle engine's side cover structure, including side cover casing, the side cover casing is adjacent to one side of driving disc group and is provided with the air intake and the crankshaft drive's impeller, is adjacent to one side of driven disc group and is provided with the air outlet, the impeller axial air intake, circumferential air outlet, be provided with spiral -shaped air -guiding rib on the side cover casing, air -guiding rib is located the circumferential outside of impeller, and the clearance between it and the circumferential outer edge of impeller gradually increases along the airflow flow direction, and forms the flow opening on the opposite side of driven disc group. The side cover structure of motorcycle engine provided by the utility model has improved the convenience and comfort of use.

Description

Technical Field

[0001] This utility model belongs to the technical field of motorcycle engines and relates to a side cover structure for a motorcycle engine. Background Technology

[0002] Motorcycle engines generate a lot of heat when they are running, so they need to be equipped with an air-cooling system. A common air-cooling structure is an impeller mounted on the crankshaft. When the engine is running, the impeller rotates with the crankshaft, generating a cooling airflow to carry away the heat.

[0003] The cooling airflow generated by the traditional air-cooled structure acts on the area where the crankshaft and drive disc assembly are located in a disorderly diffusion manner, and cannot be effectively guided to the driven disc assembly and clutch area, causing this area to become a systemic cooling blind zone. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a side cover structure for a motorcycle engine, significantly improving ease of use and comfort.

[0005] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution:

[0006] A side cover structure for a motorcycle engine includes a side cover housing. An air inlet and a crankshaft-driven impeller are provided on the side of the side cover housing adjacent to the drive disc assembly, and an air outlet is provided on the side adjacent to the driven disc assembly. The impeller receives air axially and discharges air circumferentially. A spiral air guide rib is provided on the side cover housing. The air guide rib is located on the circumferential outer side of the impeller, and the gap between the rib and the outer circumferential edge of the impeller gradually increases along the airflow direction, forming a guide opening on the opposite side of the driven disc assembly.

[0007] In the aforementioned side cover structure of a motorcycle engine, an air inlet cover outer cover is provided on the side of the side cover housing adjacent to the drive disc assembly, an air inlet cover inner cover is provided between the air inlet cover outer cover and the side cover housing, the air inlet is provided on the air inlet cover inner cover, the air inlet cover inner cover is coaxially arranged with the impeller, and an air inlet cavity communicating with the impeller is formed inside the air inlet cover inner cover.

[0008] In the aforementioned side cover structure of a motorcycle engine, the air inlet is located on the side end face of the inner cover of the air inlet cover away from the driven disc assembly. Several inclined baffles are provided at the air inlet. An annular filter unit is provided between the air inlet and the air inlet cavity. Preferably, the filter unit is arranged around the air inlet cavity.

[0009] In the aforementioned side cover structure of a motorcycle engine, the bottom of the inner cover of the air intake cover is provided with a drainage hole that communicates with the outside.

[0010] In the aforementioned side cover structure of a motorcycle engine, the inner air inlet cover and the outer air inlet cover are fixed by snap-fit, and the outer air inlet cover and the side cover housing are fixed by fasteners, which also fix the inner air inlet cover. The inner air inlet cover is provided with annular sealing elements on both sides along its axial direction; preferably, the sealing element is a sealing rubber strip; preferably, the sealing element is sealed and connected to the outer air inlet cover and the impeller respectively.

[0011] In the aforementioned side cover structure of a motorcycle engine, the central angle corresponding to the outer circumference of the impeller covered by the air guide rib is 180-270°, and the air guide opening is located at the bottom of the opposite side of the driven disc assembly.

[0012] In the aforementioned side cover structure of a motorcycle engine, the air outlet is a vertically extending channel with its lower outlet facing the bottom of the side cover housing. The side cover housing is provided with an arc-shaped air guide plate that directs airflow to the upper inlet of the air outlet. Preferably, the arc-shaped air guide plate extends upward from the bottom of the side cover housing and surrounds the driven disc assembly.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] 1. This utility model provides a side cover structure for a motorcycle engine, employing an impeller with axial air intake and circumferential air outlet. Simultaneously, a spiral-shaped air guide rib guides the circumferential airflow, directing a portion of the cooling airflow through the guide opening towards the air outlet for cooling the driven disc assembly and clutch area. This utility model further incorporates an arc-shaped air guide plate to direct the airflow towards the driven disc assembly, clutch area, and air outlet, while reducing airflow turbulence. The side cover structure provided by this utility model enhances the cooling effect of the engine, especially on the driven disc assembly side.

[0015] 2. This utility model further improves the structure of the inner cover of the air inlet cover. The inclined baffle at the air inlet can prevent some mud and water from entering the inside of the side cover with the airflow, and the drainage hole at the bottom further drains the water that has entered the side cover out of the side cover. With the above structure, the side cover structure provided by this application can be more suitable for the motorcycle's operating environment. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention;

[0017] Figure 2 This is the front view of this utility model;

[0018] Figure 3 This is a perspective view of the inner cover of the air inlet cover of this utility model;

[0019] Reference numerals in the attached drawings: 1. Side cover housing; 2. Air inlet; 3. Impeller; 4. Air outlet; 5. Air guide rib; 6. Air guide opening; 7. Outer cover of the air inlet cover; 8. Inner cover of the air inlet cover; 9. Air inlet cavity; 10. Inclined baffle; 11. Filter unit; 12. Drain hole; 13. Sealing element; 14. Arc-shaped air guide plate. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-3 :

[0021] A side cover structure for a motorcycle engine includes a side cover housing 1. An air inlet 2 and a crankshaft-driven impeller 3 are provided on the side of the side cover housing 1 adjacent to the drive disc assembly, and an air outlet 4 is provided on the side adjacent to the driven disc assembly. The impeller 3 receives air axially and discharges air circumferentially. A spiral air guide rib 5 is provided on the side cover housing 1. The air guide rib 5 is located on the circumferential outer side of the impeller 3, and the gap between it and the outer circumferential edge of the impeller 3 gradually increases along the airflow direction, forming a guide opening 6 on the opposite side of the driven disc assembly.

[0022] The working process of this embodiment is as follows: When the motorcycle engine starts, the crankshaft drives the impeller 3 to rotate. Low-temperature air from the outside enters through the air inlet 2 and is then drawn into the impeller 3 along its axial direction. The impeller 3 accelerates the airflow radially through centrifugal force and forms a circumferential airflow under the action of rotational drag speed, which is used to cool the drive disc assembly and the crankshaft. A portion of the gas flows along the spiral guide ribs 5. The guide ribs 5 gather the gas into a directional airflow and increase the static pressure. The directional airflow flows out from the guide opening 6 and is guided to the driven disc assembly for cooling the driven disc assembly and the clutch, and is finally discharged from the air outlet 4.

[0023] Furthermore, the air intake structure of this embodiment is as follows: an air intake cover 7 is provided on the side of the side cover housing 1 adjacent to the active disk assembly, an air intake cover 8 is provided between the air intake cover 7 and the side cover housing 1, the air inlet 2 is provided on the air intake cover 8, the air intake cover 8 is coaxially arranged with the impeller 3, and an air intake cavity 9 communicating with the impeller 3 is formed inside the air intake cover 8; the low-temperature air from the outside enters the air intake cavity 9 of the air intake cover 8 through the air inlet 2, and then enters the impeller 3 through the air intake cavity 9.

[0024] The aforementioned air inlet 2 is located on the side end face of the inner cover 8 away from the driven plate assembly. Several inclined baffles 10 are provided at the air inlet 2. An annular filter unit 11 is provided between the air inlet 2 and the air inlet cavity 9. Preferably, the filter unit 11 is arranged around the air inlet cavity 9. By providing the inclined baffles 10, most of the mud and water can be blocked from entering the side cover. By providing the filter unit 11, the air entering the air inlet cavity 9 can be kept clean.

[0025] The bottom of the air inlet cover 8 is provided with a drain hole 12 that communicates with the outside. By providing the drain hole 12, water that enters the air inlet cover 8 (water that is not blocked by the inclined baffle 10) can be further discharged.

[0026] The installation structure of this embodiment is as follows: the inner cover 8 and the outer cover 7 of the air inlet cover are fixed by snap-fit, the outer cover 7 of the air inlet cover and the side cover housing 1 are fixed by fasteners and the inner cover 8 of the air inlet cover is fixed at the same time, and the inner cover 8 of the air inlet cover is provided with annular sealing elements 13 on both sides along its axial direction; preferably, the sealing element 13 is a sealing rubber strip; preferably, the sealing element 13 is sealed and connected to the outer cover 7 of the air inlet cover and the impeller 3 respectively, so as to ensure that the airflow flows in a directional manner along the air inlet 2-air inlet cavity 9-impeller 3.

[0027] The central angle corresponding to the outer circumference of the impeller 3 covered by the aforementioned air guide rib 5 is 180-270°. The air guide opening 6 is located at the bottom of the opposite side of the driven disk group. The airflow flowing out of the air guide opening 6 can be more easily guided to the side where the driven disk group is located.

[0028] Furthermore, in order to guide the airflow from the guide opening 6 to the air outlet 4, the air outlet 4 is a vertically extending channel with its lower outlet facing the bottom of the side cover housing 1. The side cover housing 1 is provided with an arc-shaped air guide plate 14 to guide the airflow to the upper inlet of the air outlet 4. Preferably, the arc-shaped air guide plate 14 extends upward from the bottom of the side cover housing 1 and surrounds the driven plate assembly. After the airflow flows out from the guide opening 6, it flows along the arc-shaped air guide plate 14, cools the driven plate assembly and clutch, and then flows out from the air outlet 4.

[0029] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A side cover structure of a motorcycle engine comprising a side cover case (1) provided with an air inlet (2) and a crankshaft-driven impeller (3) adjacent to one side of a driving disc set, and an air outlet (4) adjacent to one side of a driven disc set, characterized in that, The impeller (3) has axial air intake and circumferential air exhaust. The side cover housing (1) is provided with a spiral air guide rib (5). The air guide rib (5) is located on the circumferential outer side of the impeller (3). The gap between the rib and the outer circumferential edge of the impeller (3) gradually increases along the airflow direction and forms a guide opening (6) on the opposite side of the driven disk assembly.

2. A side cover structure for a motorcycle engine according to claim 1, characterized in that, An air inlet cover (7) is provided on the side of the side cover housing (1) adjacent to the active disk assembly. An air inlet cover (8) is provided between the air inlet cover (7) and the side cover housing (1). The air inlet (2) is provided on the air inlet cover (8). The air inlet cover (8) is coaxially arranged with the impeller (3). An air inlet cavity (9) communicating with the impeller (3) is formed inside the air inlet cover (8).

3. A side cover structure for a motorcycle engine according to claim 2, characterized in that, The air inlet (2) is located on the side of the inner cover (8) away from the driven plate assembly. Several inclined baffles (10) are provided at the air inlet (2). An annular filter unit (11) is provided between the air inlet (2) and the air inlet cavity (9).

4. The side cover structure of a motorcycle engine according to claim 2, characterized in that, The bottom of the air inlet cover (8) is provided with a drain hole (12) that communicates with the outside.

5. The side cover structure of a motorcycle engine according to claim 2, characterized in that, The inner cover (8) and the outer cover (7) of the air inlet cover are fixed by snap-fit. The outer cover (7) and the side cover housing (1) are fixed by fasteners and the inner cover (8) of the air inlet cover are fixed at the same time. The inner cover (8) of the air inlet cover is provided with annular sealing elements (13) on both sides along its axial direction.

6. The side cover structure of a motorcycle engine according to claim 1, characterized by The air guide rib (5) covers the outer circumference of the impeller (3) with a central angle of 180-270°, and the air guide opening (6) is located at the bottom of the opposite side of the driven disk assembly.

7. The side cover structure of a motorcycle engine according to claim 1, characterized by The air outlet (4) is a vertically extending channel with its lower outlet facing the bottom of the side cover housing (1). The side cover housing (1) is provided with an arc-shaped air guide plate (14) that guides the airflow to the upper inlet of the air outlet (4). The arc-shaped air guide plate (14) extends upward from the bottom of the side cover housing (1) and surrounds the driven plate assembly.

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