CN117341873A

CN117341873A - Motorcycle

Info

Publication number: CN117341873A
Application number: CN202311121747.8A
Authority: CN
Inventors: 何丹; 刘维洨; 黄灿; 刘进伟; 覃永川
Original assignee: Chongqing Longxin New Energy Technology Co ltd
Current assignee: Chongqing Longxin New Energy Technology Co ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-01-05

Abstract

The invention discloses a motorcycle, which comprises a motorcycle body and a heat dissipation device arranged at the front part of the motorcycle body and used for dissipating heat of an engine, wherein the heat dissipation device comprises a radiator and a radiator grille arranged on the front surface of the radiator; the horizontal two sides and the bottom side of the radiator grille are respectively and hermetically arranged with the corresponding sides of the radiator, and a U-shaped air inlet channel is formed between the radiator and the radiator grille; the periphery of the radiator grille and the radiator are sealed, and a circumferentially closed air inlet channel is formed in the middle of the radiator grille, so that air flow passing through the grille from the front end can completely enter the core of the radiator, the outward overflow of the air flow is reduced, the air inlet quantity of the radiator can be effectively improved, and the cooling performance of a motorcycle engine is further improved; in addition, still be provided with fan and fan housing at the back of radiator, through the discharge opening portion that sets up on the fan housing, can effectually arrange high temperature outside air to the position of needs, promote the driving comfort level.

Description

Motorcycle

Technical Field

The invention belongs to the technical field of motorcycle structures, and particularly relates to a motorcycle and a heat dissipation device thereof.

Background

In the existing motorcycle structure, a radiator is generally arranged at the front part of the motorcycle, and the radiator utilizes heat exchange between a cooling medium and running wind to realize heat dissipation of the cooling medium; in order to ensure the heat dissipation of the motorcycle under the working conditions of low-speed climbing, idling and the like, a fan and a fan cover are additionally arranged on the back surface of the radiator, the fan cover and the like and the radiator form a heat dissipation device of the motorcycle together, and the fan operates to suck wind into the radiator to ensure the heat dissipation; meanwhile, in order to protect the radiator core from being damaged by hard road surface objects, a radiator grille is often additionally arranged on the front surface of the radiator.

However, since there is a certain gap between the front surface of the radiator and the front surface of the radiator, when the airflow at the front end of the vehicle passes through the grille, part of the airflow is affected by the resistance of the radiator, and flows and escapes along the surface of the radiator to two sides, especially two lateral sides, so that the air quantity entering the radiator is reduced, the cooling performance of the motorcycle engine is further affected, the temperature of the cooling liquid is increased, and a larger radiator is needed to control the temperature of the cooling liquid, so that the cost is increased. In addition, the existing fan cover structure can not better consider the problem of guiding the high-temperature air flow after heat exchange of the radiator, so that the high-temperature air flow flows to the leg area of the driver more, and uncomfortable influence is caused to the driver.

Therefore, there is a need for improved designs of related structures of existing motorcycles to improve the cooling performance of the motorcycle and riding comfort of the driver.

Disclosure of Invention

In view of the above, the present invention aims to provide a motorcycle, which is capable of at least solving the technical problem of more air loss in the existing heat dissipation device by improving the design of the existing heat dissipation device of the motorcycle, thereby improving the cooling performance of the motorcycle engine.

In order to achieve the above purpose, the present invention provides the following technical solutions: the motorcycle comprises a motorcycle body and a heat dissipation device arranged at the front part of the motorcycle body and used for dissipating heat of an engine, wherein the heat dissipation device comprises a radiator and a radiator grille arranged on the front surface of the radiator; the horizontal two sides and the bottom side of the radiator grille are respectively and hermetically arranged with the corresponding sides of the radiator, and a U-shaped air inlet channel is formed between the radiator grille and the radiator; in this structural design, because the lower part of radiator is general to the installation setting of backward slope, the reason of preceding fender simultaneously, the direction of going the wind is general from top to bottom entering grid that inclines, can not follow radiator top diffusion, so through with the radiator grid behind the sealed of horizontal both sides and the bottom side, can form U-shaped air inlet passageway between radiator grid and radiator for the air current that passes through the grid from the front end can get into the core of radiator completely, can effectively reduce the excessive dispersion of air current, and then effectively improve the intake of radiator, and then improve motorcycle engine's cooling performance, compact structure does not need to increase transverse dimension simultaneously.

Further, a left seal and a right seal are respectively and correspondingly arranged on two lateral sides of the radiator grille, and the left seal and the right seal are respectively and correspondingly attached to lateral plate surfaces on two lateral sides of the radiator so as to finish the sealing of the radiator grille on two lateral sides; in the structural design, the left seal strip and the right seal strip are correspondingly additionally arranged on the two lateral sides of the radiator grille, so that edge sealing of the corresponding sides can be effectively completed, and meanwhile, the structure of the middle part of the radiator grille is not influenced, and the structure is simple.

Further, the lower side edge of the radiator grille extends outwards to form a lower flanging part, and the lower flanging part is attached to the outer surface of the lower water chamber of the radiator so as to finish the closing of the lower side of the radiator grille; in this structural design, do benefit to better laminating with the lower hydroecium of radiator and accomplish the edge airtight of corresponding side through setting up down turn-ups portion, simple structure.

Further, a grid left mounting part for fixing the radiator grid to the radiator is formed on the left seal strip in a way that the left seal strip extends backwards along the left side plate surface of the radiator; a grid right mounting part for fixing the radiator grid to the radiator is formed on the right seal strip in a backward extending mode along the right side plate surface of the radiator; according to the structural design, the left grille installation part and the right grille installation part are correspondingly arranged on the left seal and the right seal, so that the radiator grille and the radiator can be installed conveniently.

The heat dissipating device further comprises a fan and a fan cover, wherein the fan is arranged on the back surface of the radiator and used for sucking external air, and the fan cover is arranged at the rear part of the fan and used for discharging the external air sucked by the fan and passing through the radiator, namely high-temperature external air, to the outside; the fan cover has a side wall part and a rear wall part for covering the fan, and a discharge opening part for discharging high-temperature external air to the outside and an air guide part for guiding high Wen Waibu air to the discharge opening part are formed on the side wall part; in this structural design, through setting up fan and fan housing at the rear portion of radiator and can effectively guarantee the heat dissipation of radiator under the circumstances such as idle speed or low-speed climbing, through setting up the discharge opening portion that is used for discharging high temperature outside air to outside on the fan housing simultaneously, can effectually arrange high temperature outside air to the position of needs, if can set up to the position that avoids the more flow direction driver's of high temperature air shank region, promote driver's riding travelling comfort.

Further, the discharge opening portion includes left and right discharge opening portions, and the air guide portion includes left and right air guide portions formed correspondingly on the side wall portion; in this structural design, left side that corresponds the setting is discharged the opening and is discharged the opening with right side and can be better outside the lateral both sides with high temperature outside air, avoids the position setting of the more flow direction driver's of high temperature air flow shank region, promotes the riding travelling comfort of driver, and the guide of air current can effectively be accomplished to left side wind-guiding guide portion and the right wind-guiding guide portion that corresponds the setting simultaneously, and the structure is reliable.

Further, the left discharge opening portion is located on the left lower side based on the center of the fan housing, and the left air guide portion is a straight wall surface located on the left discharge opening portion and arranged obliquely upstream in the fan rotation direction; the right exhaust opening part is positioned on the right side of the center of the fan cover, and the right air guide part is an arc-shaped wall surface positioned on the upstream of the right exhaust opening part along the rotation direction of the fan; in the structural design, the inclination angle of the flat wall surface can be adjusted, so that the direction of the external high-temperature air discharged along the left discharge opening part can be adjusted; the arc-shaped wall surface is beneficial to guiding part of external high-temperature air to be discharged rightward and upward.

Further, the motorcycle body is further provided with pedals arranged on two lateral sides of the motorcycle body, the main exhaust direction of the left exhaust opening part is the included angle area between the pedals on two sides and the center connecting line of the fan cover, and the external high-temperature air is guided and exhausted to the area, so that the flow direction of the left external high-temperature air to the lower leg and the foot can be effectively reduced, and the position is reasonable.

Further, the downside of fan housing is formed with the lower wall portion that covers the fan downside, and the one end of lower wall portion links to each other with right wind-guiding guide portion, and this structural design can stop the outflow that partial high temperature outside air flows downwards to guide partial high temperature outside air flow direction to discharge opening portion, does benefit to the assurance warm outside air along setting for the direction of predetermineeing and discharging.

Further, the bottom of the side wall part near the side of the radiator is outwards folded and extended along the circumferential direction to form a fan cover mounting part for fixedly mounting the fan cover on the radiator; this structure is favorable to realizing the stable installation of fan housing.

The invention has at least the following beneficial effects:

1. the U-shaped air inlet channel is formed in the middle part by sealing and installing the two lateral sides and the bottom side of the radiator grille and the corresponding side of the radiator, so that the air flow passing through the grille from the front end can completely enter the core of the radiator, the overflow and the dispersion of the air flow to the two lateral sides and the bottom side are reduced, the air inlet quantity of the radiator can be effectively improved, and the cooling performance of a motorcycle engine is further improved;

2. the fan and the fan cover are arranged at the rear part of the radiator, so that the heat dissipation of the radiator can be effectively ensured under the conditions of idling, low-speed climbing and the like, and meanwhile, the high-temperature external air can be effectively discharged to a required position by arranging the discharge opening part for discharging the high-temperature external air to the outside on the fan cover, for example, the fan cover can be arranged at a position which can avoid more high-temperature air flow to the leg area of a driver, and the riding comfort of the driver is improved;

3. the U-shaped air inlet channel of the radiator and the novel fan cover structure are integrated to form an air inlet and outlet control structure of the motorcycle radiator, so that the cooling effect of the radiator under the working condition of heavy load can be enhanced, and the thermal comfort of a driver under the medium and small load can be considered.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

FIG. 1 is a schematic front view of the whole structure of the present invention

FIG. 2 is an axial schematic view of the whole structure of the present invention

Fig. 3 is a schematic rear view of a heat dissipating device according to the present invention

Fig. 4 is a schematic front view of a heat dissipating device according to the present invention

Fig. 5 is a schematic diagram of an axial structure of a heat dissipating device according to the present invention

Reference numerals: 1-a motorcycle body; 2-a heat sink; 201-a heat sink; 201 a-a water feeding chamber; 201 b-a drain chamber; 202-a radiator grille; 202 a-an upturn portion; 202 b-a turndown portion; 203-left seal; 203 a-a grid left mounting portion; 204-right seal; 204 a-grid right mount; 205-a fan; 206-fan housing; 206 a-sidewall portions; 206 a-1-left discharge opening portion; 206 a-2-right discharge opening portion; 206 a-3-left wind guide; 206 a-4-right wind guide; 206 b-a rear wall portion; 206 c-a lower wall portion; 206 d-fan housing mounting portion; 206 e-fan mounting portion 206e.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments are merely for explaining the basic idea of the present invention, and the following embodiments and features in the embodiments may be combined with each other without conflict.

The following references to directions such as "front", "rear", "left" and "right" refer to directions based on the view angle of fig. 1, that is, the direction of the front side is the front, the direction of the rear side is the left side when viewed toward the front side, and the direction of the right side when viewed toward the front side.

Referring to fig. 1-5, a motorcycle includes a motorcycle body 1 and a heat dissipating device 2 disposed at the front of the motorcycle body 1 for dissipating heat from an engine, the heat dissipating device 2 includes a heat sink 201 and a heat sink grille 202 mounted on the front of the heat sink 201, the motorcycle body includes an engine, a front wheel, a rear wheel, a frame, etc., the general heat sink 201 is disposed at the rear side of the front wheel and the upper part of the heat sink 201 is disposed obliquely forward to facilitate receiving air flow blown from the front end, these are conventional arrangements of the existing motorcycle, and are not repeated here, the two lateral sides and the bottom side of the heat sink grille 202 are respectively mounted with corresponding sides of the heat sink in a sealing manner, and a U-shaped air inlet channel is formed between the heat sink grille 202 and the heat sink 201, where the sealing mounting of the three sides is not limited, and sealing mounting can be completed in forms such as sealing strips, flange fitting, etc.; in general, the shape of a single grid hole of the radiator grid is smaller and different from that of an air inlet on the front side of the radiator so as to play a role in protection, and meanwhile, in order to reduce the influence of the radiator grid on the air inlet of the radiator, the radiator grid and the front side of the radiator are arranged at a certain distance so as to ensure that air flows entering from each grid hole can diffuse along the front surface of the radiator to fully enter the inside of the radiator for heat exchange, and a U-shaped air inlet channel is a channel enclosed by the two lateral sides and the bottom side of the radiator grid 202;

in the structural design, because the lower part of the radiator is generally installed in a backward inclined way, and meanwhile, the direction of the running wind is generally inclined from top to bottom and enters the grille and can not diffuse out from the upper part of the radiator, after the two lateral sides and the bottom side of the radiator grille are sealed, a U-shaped air inlet channel can be formed between the radiator grille and the radiator, so that the airflow passing through the grille from the front end can completely enter the core of the radiator, the overflow and the dispersion of the airflow can be effectively reduced, the air inlet of the radiator can be effectively improved, the cooling performance of a motorcycle engine can be improved, the structure is compact, the transverse size is not increased, and the running resistance is reduced.

In this embodiment, the left seal 203 and the right seal 204 are respectively and correspondingly provided on two lateral sides of the radiator grille 202, the shape of the general radiator is rectangular, the left seal 203 and the right seal 204 have a strip structure, which can be integrated with the radiator grille 202, and the left seal 203 and the right seal 204 are respectively and correspondingly attached to two lateral sides of the radiator grille 201, so as to complete the sealing of the radiator grille 202 on two lateral sides; in the structural design, the left seal strip and the right seal strip are correspondingly additionally arranged on the two lateral sides of the radiator grille, so that edge sealing of the corresponding sides can be effectively completed, and meanwhile, the structure of the middle part of the radiator grille is not influenced, and the structure is simple.

In this embodiment, the lower side edge of the radiator grille 202 extends outwards to form a lower flanging part 202b, and the lower flanging part 202b is attached to the outer surface of the lower water chamber 201b of the radiator 201 to complete the closing of the lower side of the radiator grille 202; the radiator 201 is generally provided with water chambers at the upper side and the lower side, the upper water chamber and the lower water chamber are communicated with the engine through pipelines to form circulation of a cooling loop, and for this purpose, the lower flanging part is arranged on the radiator grille to facilitate better fitting with the lower water chamber of the radiator and complete edge sealing of the corresponding side, so that the radiator has a simple structure;

in addition, here, the upper side edge of the radiator grille 202 is formed with an upturned portion 202a extending outwards, the upturned portion 202a is attached to the outer surface of the upper water chamber 201a of the radiator 201 to close the upper side of the radiator grille 202, and the upturned portion is arranged on the radiator grille to facilitate better attachment with the upper water chamber of the radiator and complete edge sealing of the corresponding side, so that the radiator grille is simple in structure, and the upper side can be sealed and installed due to relatively small influence of the upper side on the air inlet quantity, and of course, the upper side can be not sealed as required.

In this embodiment, a grid left mounting portion 203a for fixing the radiator grid 202 to the radiator 201 is formed on the left seal 203 along the left side plate of the radiator 201 and extends backward, specifically, a supporting lug structure formed along the left side plate of the radiator 201 is formed, and the mounting can be completed by screws or the like; a grid right mounting portion 204a for fixing the radiator grid 202 to the radiator 201 is formed on the right seal 204 along the right side plate surface of the radiator 201 in a backward extending manner, specifically, a lug structure formed along the left side plate surface of the radiator 201 is formed, and the mounting can be completed by screws and the like; the left grille installation part and the right grille installation part are correspondingly arranged on the left seal and the right seal, so that the radiator grille and the radiator can be conveniently installed.

In this embodiment, at least two left mounting portions 203a of the grille are arranged at intervals along the length direction of the left seal 203; at least two right grating mounting portions 204a are arranged at intervals along the length direction of the right seal 204a, and preferably, 2 right grating mounting portions 203a and 2 right grating mounting portions 204a are arranged; the structural design is favorable for ensuring stable installation and reliable structure of the radiator grille.

In this embodiment, the heat dissipating device 2 further includes a fan 205 and a fan cover 206, where the fan 205 is disposed at the back of the heat sink 201 to suck external air, specifically, air flow is sucked by rotation of fan blades, and the fan cover 206 is disposed at the rear of the fan to exhaust the external air sucked by the fan 205 and passing through the heat sink 201, that is, high-temperature external air, to the outside, and of course, the fan cover may also play a role of wind gathering to enhance the air suction effect; the fan cover 206 has a side wall 206a and a rear wall 206b for covering the fan 205, and a discharge opening for discharging high-temperature outside air to the outside and an air guide for guiding high Wen Waibu air to the discharge opening are formed in the side wall 206 a; through setting up fan and fan housing at the rear portion of radiator can effectively guarantee the heat dissipation of radiator under the circumstances such as idle speed or low-speed climbing, simultaneously through set up the discharge opening portion that is used for discharging high temperature outside air to outside on the fan housing, can effectually discharge high temperature outside air to the position of needs, if can set up to the position that avoids the more flow direction driver's of high temperature air flow shank region, promote driver's riding travelling comfort.

In this embodiment, the discharge opening includes left and right discharge openings 206a-1 and 206a-2, and the air guide includes left and right air guide portions 206a-3 and 206a-4 formed on the side wall portion 206a, respectively; the left discharge opening 206a-1 is located at the left lower side based on the center of the fan housing 206, the left air guiding portion 206a-3 is a flat wall surface located at the upper side of the left discharge opening 206a-1 along the rotation direction of the fan 205, the direction in which the external high temperature air is discharged along the left discharge opening 206a-1 can be effectively adjusted by adjusting the inclination angle of the flat wall surface, and preferably, the angle between the generally flat wall surface and the vertical direction of the center of the fan housing is 0-90 degrees, specifically, see fig. 3, where the fan rotates counterclockwise, the left air guiding portion 206a-3 is disposed at the upper side of the left discharge opening 206a-1, and guides part of the external high temperature air to be discharged from the left discharge opening 206a-1 to the left lower side; the right discharge opening 206a-2 is located at the right side of the center of the fan housing 206, the right air guiding portion 206a-4 is an arc wall surface located at the upstream of the right discharge opening 206a-2 in the rotation direction of the fan 205, specifically, see fig. 3, where the fan rotates counterclockwise, the right air guiding portion 206a-4 is located at the lower side of the right discharge opening 206a-2, and the arc wall surface guides the external high temperature air to be discharged rightward and upward; the left exhaust opening part and the right exhaust opening part that corresponding set up can be better discharge outside the lateral both sides with high temperature outside air, avoid the position setting of the more flow direction driver's of high temperature air current shank region, promote the riding travelling comfort of driver, the guide of air current can effectively be accomplished to left air-guiding guide part and the right air-guiding guide part of corresponding setting simultaneously, and the structure is reliable.

In this embodiment, the motorcycle further includes pedals 3 disposed on two lateral sides of the motorcycle body 1, the main exhaust direction of the left exhaust opening 206a-1 is an included angle area formed by connecting the pedals 3 on two sides and the center of the fan cover 206, and the exhaust direction is the external high-temperature air exhaust direction, so that the external high-temperature air is guided and exhausted to the area, which can effectively reduce the flow direction of the left external high-temperature air to the lower leg and the foot, and the position is reasonable.

In this embodiment, a lower wall portion 206c covering the lower side of the fan 205 is formed on the lower side of the fan cover 206, and one end of the lower wall portion 206c is connected to the right air guiding portion 206a-4; the structure design can prevent part of high-temperature external air from flowing downwards and guide part of high-temperature external air to flow to the discharge opening part, thereby being beneficial to ensuring that the high-temperature external air is discharged along a preset direction.

In this embodiment, the side wall portion 206a is formed with a fan housing mounting portion 206d for fixedly mounting the fan housing 206 to the heat sink 201 by extending and turning over the bottom portion of the side wall portion 206a near the heat sink 201 in the circumferential direction, specifically, the side wall portion 206a of the fan housing 206 is respectively extending and turning over in the lateral direction, and the fan housing mounting portion 206d formed by the outward turning-over design is beneficial to realizing stable mounting between the fan housing 206 and the heat sink 201.

In the present embodiment, a fan mounting portion 206e for mounting the fan 205 is formed at the center of the rear wall portion 206 a; specifically, the three mounting holes are uniformly distributed, and of course, other mounting structures can be adopted, and the fan mounting part is designed on the fan cover, so that the fan mounting can be simplified.

In the embodiment, the effects of the U-shaped air inlet channel of the radiator and the novel fan cover structure are combined, so that the air inlet and outlet control structure of the motorcycle radiator can be formed, the cooling effect of the radiator under the working condition of large load can be enhanced, and the thermal comfort of a driver under the medium and small load can be considered.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.

Claims

1. A motorcycle, characterized in that: the motorcycle engine comprises a motorcycle body (1) and a heat dissipation device (2) arranged at the front part of the motorcycle body (1) and used for dissipating heat of an engine, wherein the heat dissipation device (2) comprises a radiator (201) and a radiator grille (202) arranged on the front surface of the radiator (201);

the horizontal two sides and the bottom side of the radiator grille (202) are respectively and hermetically installed with the corresponding sides of the radiator (201), and a U-shaped air inlet channel is formed between the radiator grille (202) and the radiator (201).

2. A motorcycle as claimed in claim 1, wherein: the radiator grille (202) is characterized in that a left seal (203) and a right seal (204) are respectively and correspondingly arranged on two lateral sides of the radiator grille (202), and the left seal (203) and the right seal (204) are respectively and correspondingly attached to lateral plate surfaces on two lateral sides of the radiator (201) so as to complete sealing of the radiator grille (202) on two lateral sides.

3. A motorcycle as claimed in claim 2, wherein: the lower side edge of the radiator grille (202) extends outwards to form a lower flanging part (202 b), and the lower flanging part (202 b) is attached to the outer surface of a lower water chamber (201 b) of the radiator (201) to complete the sealing of the lower side of the radiator grille (202).

4. A motorcycle as claimed in claim 3, wherein: a grid left mounting part (203 a) for fixing the radiator grid (202) to the radiator (201) is formed on the left seal (203) along the left side plate of the radiator (201) in a backward extending way;

a grid right mounting part (204 a) for fixing the radiator grid (202) to the radiator (201) is formed on the right seal (204) in a way that the right seal extends backwards along the right side plate surface of the radiator (201).

5. A motorcycle as claimed in claim 1, wherein: the heat dissipating device (2) further comprises a fan (205) and a fan cover (206), wherein the fan (205) is arranged on the back surface of the heat sink (201) and is used for sucking external air, and the fan cover (206) is arranged at the rear part of the fan and is used for discharging the external air sucked by the fan (205) and passing through the heat sink (201), namely high-temperature external air, to the outside;

the fan cover (206) has a side wall (206 a) and a rear wall (206 b) for covering the fan (205), and a discharge opening for discharging high-temperature outside air to the outside and an air guide for guiding high Wen Waibu air to the discharge opening are formed in the side wall (206 a).

6. A motorcycle as claimed in claim 5, wherein: the discharge opening portion includes a left discharge opening portion (206 a-1) and a right discharge opening portion (206 a-2), and the air guide portion includes a left air guide portion (206 a-3) and a right air guide portion (206 a-4) formed correspondingly on the side wall portion (206 a).

7. A motorcycle as claimed in claim 6, wherein: the left discharge opening (206 a-1) is positioned on the left lower side based on the center of the fan housing (206), and the left air guide (206 a-3) is a straight wall surface positioned on the left discharge opening (206 a-1) and arranged obliquely upstream in the rotation direction of the fan (205);

the right discharge opening (206 a-2) is located on the right side of the center of the fan housing (206), and the right air guide (206 a-4) is an arc-shaped wall surface located upstream of the right discharge opening (206 a-2) in the rotational direction of the fan (205).

8. A motorcycle as claimed in claim 7, wherein: the motorcycle is characterized by further comprising pedals (3) arranged on two lateral sides of the motorcycle body (1), wherein the main exhaust direction of the left exhaust opening part (206 a-1) is an included angle area formed by connecting the pedals (3) on two sides with the center of the fan cover (206).

9. A motorcycle as claimed in claim 5, wherein: a lower wall part (206 c) covering the lower side of the fan (205) is formed on the lower side of the fan cover (206), and one end of the lower wall part (206 c) is connected with the right air guiding part (206 a-4).

10. A motorcycle as claimed in claim 5, wherein: a fan cover mounting part (206 d) for fixedly mounting the fan cover (206) to the radiator (201) is formed by the bottom of the side wall part (206 a) close to the radiator (201) and extending outwards along the circumferential direction.