Cooling structure for a motor of a motorcycle

Abstract

The application provides a cooling structure of a motorcycle motor, and belongs to the technical field of electric motorcycles. The technical problem of insufficient heat dissipation effect of the existing motorcycle motor cooling device is solved. The cooling structure of the motorcycle motor, the motorcycle comprising a gearbox body and a motor shell in a cylindrical shape and arranged transversely, one end of the motor shell extending out of the gearbox body, the cooling structure comprising a wind scooping plate located at the rear of the outer end of the motor shell and having a front plate surface, an upper and lower through cooling air duct being formed between the wind scooping plate and the rear surface of the motor shell and being used for air flow, the other end of the motor shell being located in the inner cavity of the gearbox body, a transversely arranged connecting shaft being rotatably connected to the inner cavity of the gearbox body, the connecting shaft being located at the side of the motor shell, and a radial protruding oil throwing part being arranged on the connecting shaft. The application has more optimal and reliable heat dissipation and cooling effect on the motor.

Description

Technical Field

[0001] The invention belongs to the technical field of electric motorcycles and relates to a cooling structure of a motorcycle motor. Background Art

[0002] An electric motorcycle is a type of motorcycle that uses a battery to drive an electric motor instead of an engine. The electric drive and control system consists of a drive motor, a power supply, and a speed control device for the motor. The rest of the components of an electric motorcycle are essentially the same as those of an internal combustion engine. Similar to an engine, the motor of an electric motorcycle also requires targeted heat dissipation to ensure stable and reliable operation.

[0003] The patent with authorization announcement number CN210246487U discloses a built-in motor cooling device for an electric motorcycle, including a housing, a motor, an oil pump and an oil nozzle; the oil pump is arranged at the bottom of the housing; an oil inlet is provided at the top of the housing, and an oil outlet is provided at the bottom of the housing; the inner side of the oil outlet is connected to the oil pump, and the outer side of the oil outlet is connected to the inlet of a radiator through a pipe; the inner side of the oil inlet is connected to the oil nozzle, and the outer side of the oil inlet is connected to the outlet of the radiator through a pipe; the oil nozzle is provided with a plurality of first spray holes and second spray holes.

[0004] The above structure cools the motor through an oil pump combined with an oil injector, but relies on the oil to bear the heat dissipation work of the entire motor, requires an independent oil cooling system, and often cannot meet the heat dissipation needs of the motor, resulting in insufficient heat dissipation effect. Summary of the Invention

[0005] In view of the above problems existing in the prior art, the present invention provides a cooling structure for a motorcycle motor. The technical problem to be solved by the present invention is to improve the heat dissipation and cooling effect of the motorcycle motor.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A cooling structure for a motorcycle motor, the motorcycle comprising a gearbox body and a cylindrical, transversely disposed motor housing, characterized in that one end of the motor housing extends out of the gearbox body, the cooling structure comprising a vent plate located behind the outer end of the motor housing with its plate surface facing forward, a cooling air duct extending vertically through the vent plate and the rear surface of the motor housing forming a cooling air duct for airflow therethrough, the other end of the motor housing being located within an inner cavity of the gearbox body, the inner cavity of the gearbox body being rotatably connected to a transversely disposed connecting shaft, the connecting shaft being located on a side of the motor housing, the connecting shaft being provided with a radially protruding oil-slinging portion.

[0008] The motor housing of the electric motorcycle is used to accommodate motor components. The horizontal arrangement of the motor housing is conducive to making the output direction design of the motor consistent with the output direction of the original engine; by setting one end of the motor housing to be fixed in the inner cavity of the gearbox body, a rotatable connecting shaft is set in the gearbox body, and an oil-slinging part is set on the connecting shaft. The oil-slinging part can be in a columnar or spoon-shaped shape that can drive the oil to splash, and the other end extends out of the gearbox body and a fan plate connected to the gearbox body is set behind the end, so that a cooling air duct that passes through from top to bottom is formed between the fan plate and the rear surface of the motor housing. In this way, when the oil-slinging part swings with the connecting shaft at one end of the motor housing located in the inner cavity of the gearbox The oil is splashed in the gearbox body, and the splashed oil can cool the motor housing, thereby achieving a cooling effect on that end. During the driving of the motorcycle, the external airflow can dissipate heat to the outer end of the motor housing, thereby achieving synchronous heat dissipation of both ends of the motor. The air scoop guides the airflow passing through the surface of the motor housing, so that the airflow flows vertically in the cooling air duct and cools the rear surface of the motor housing, thereby improving the heat dissipation effect. At the same time, the gearbox body blocked by the motor housing is also cooled by air, thereby reducing the temperature of the internal oil. In this way, the full combination of oil cooling and air cooling can achieve a better and more reliable heat dissipation cooling effect for the motor.

[0009] In the aforementioned motorcycle motor cooling structure, the bottom of the motor housing is positioned close to the bottom of the gearbox inner cavity. This allows the bottom portion of the motor housing to be directly immersed below the engine oil level, achieving direct heat exchange cooling of the motor and ensuring effective cooling.

[0010] In the aforementioned motorcycle motor cooling structure, the transmission case rotatably connects a transversely arranged main shaft and countershaft. The main shaft and countershaft are spaced longitudinally along the motorcycle and are capable of driving engagement. The main shaft is located between the countershaft and the motor case, and the connecting shaft is located below the countershaft and is in driving engagement with the countershaft. The main shaft of the transmission case is drivingly connected to the motor output, while the countershaft delivers power to the main shaft in a meshing manner. This close proximity of the main shaft to the motor case ensures a compact layout, and the connecting shaft, driven by the countershaft, ensures that the connecting shaft remains operational during motorcycle operation, ensuring continuous cooling.

[0011] In the aforementioned motorcycle motor cooling structure, the countershaft is longitudinally arranged adjacent to the inner cavity sidewall of the transmission case. Thus, when the oil-slinging unit flings the oil toward the inner wall of the transmission case near the countershaft, it can create an oil mist that fully lubricates the adjacent countershaft. Furthermore, when the countershaft and the main shaft are engaged, the main shaft is also lubricated. Furthermore, the countershaft's distance from the motor case allows the oil beneath it to reach a lower temperature. This oil mist, flowing upward along the top of the transmission case's inner cavity and reaching the motor case, effectively cools the unsoaked outer wall of the motor case.

[0012] In the aforementioned motorcycle motor cooling structure, the oil-slinging portion is tubular and has an axially disposed notch that communicates with the inner cavity of the oil-slinging portion. This facilitates the oil-slinging portion extending out of the oil-slinging portion and the flow of engine oil through the notch into the oil-slinging portion, thereby increasing the amount of oil slinging upward, thereby improving lubrication and cooling.

[0013] In the motorcycle motor cooling structure described above, a cooling oil chamber is formed between the bottom surface of the gearbox housing's inner cavity and the bottom outer wall of the motor housing, extending around the motor housing's periphery. Part of this chamber is located on the front side of the motor housing. This ensures that the oil in the chamber fully exchanges heat and cools the bottom and front side of the motor housing at that end, ensuring effective cooling.

[0014] In the aforementioned motorcycle motor cooling structure, the motor housing's outer surface features circumferentially spaced heat dissipation ribs, which are arranged axially along the motor housing. These ribs not only increase the heat dissipation area but also balance temperature differences at both ends of the motor's axial axis, enabling a more uniform cooling effect through collaborative heat exchange between air and oil cooling.

[0015] In the aforementioned motorcycle motor cooling structure, the ventilation plate includes an air induction plate with an upper end tilted forward. The upper end of the air induction plate is higher than the top of the motor housing. This allows air flowing through the motor housing from above to flow backward toward the air induction plate and, guided by the air induction plate, flow smoothly downward, thereby minimizing air velocity loss and ensuring effective heat exchange.

[0016] In the aforementioned motorcycle motor cooling structure, the lower end of the air scoop plate is provided with a deflector plate with its lower end tilted forward. This deflector plate allows airflow from the air scoop plate to exit closer to the motor housing, thereby fully absorbing heat from the leeward side of the motor housing and improving heat exchange uniformity.

[0017] In the aforementioned motorcycle motor cooling structure, the central portion of the ventilator plate has a forward-arching protrusion; the ventilator plate has a vertically disposed, forward-extending outer cover plate, which is attached to the inner side of the outer cover plate and laterally faces the cooling duct. This creates a constricted structure between the central portion of the ventilator plate and the motor housing, increasing the local velocity of the airflow in that area and bringing the airflow closer to the motor housing for heat exchange, thereby enhancing cooling and heat exchange. The outer cover plate restricts the airflow at the ventilator plate, reducing lateral escape of airflow and thereby enhancing heat exchange.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] In the cooling structure of the motorcycle motor, the motor housing is located at one end of the inner cavity of the transmission body. When the oil-slinging part swings with the connecting shaft, the oil splashes in the transmission body. The splashed oil can cool the motor housing, thereby achieving a cooling effect on this end. It is suggested that the external airflow can dissipate heat to the outer end of the motor housing during the running of the motorcycle, thereby achieving synchronous heat dissipation of both ends of the motor. The air scoop guides the airflow flowing through the surface of the motor housing, so that the airflow flows vertically in the cooling air duct and performs air cooling on the rear surface of the motor housing, thereby improving the heat dissipation effect. At the same time, the transmission body blocked by the motor housing is also cooled by air, thereby reducing the temperature of the internal oil. In this way, the oil cooling and air cooling are fully combined to achieve a better and more reliable heat dissipation cooling effect for the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of this embodiment.

[0021] Figure 2 It is a schematic cross-sectional structural diagram of this embodiment.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure from another angle of this embodiment.

[0023] Figure 4 It is a three-dimensional schematic diagram of the local structure of this embodiment.

[0024] Figure 5 It is a three-dimensional schematic diagram of the local structure of the embodiment in which the main shaft and the secondary shaft are hidden.

[0025] Figure 6 yes Figure 5 Enlarged view of part A in .

[0026] Figure 7 1 is a schematic diagram of the three-dimensional structure of the windshield in this embodiment.

[0027] In the figure, 1, motor housing; 11, heat dissipation ribs;

[0028] 2. Gearbox body; 21. Cooling oil chamber;

[0029] 3. Wind board; 31. Wind guide plate; 32. Air guide plate; 33. Outer cover plate; 34. Raised part;

[0030] 4. Connecting shaft;

[0031] 5. Oil throwing part; 51. Notch;

[0032] 6. Main spindle; 7. Sub-spindle; 8. Cooling air duct. DETAILED DESCRIPTION

[0033] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0034] like Figures 1-7As shown, in the cooling structure of the motorcycle motor, the motorcycle includes a cylindrical and horizontally arranged motor housing 1, and the cooling structure includes a gearbox body 2. One end of the motor housing 1 is fixed in the gearbox body 2, and the bottom of the motor housing 1 is arranged close to the bottom surface of the inner cavity of the gearbox body 2. The other end of the motor housing 1 extends out of the gearbox body 2. A scooter plate 3 with a forward plate surface is provided behind the other end of the motor housing 1. The upper end of the scooter plate 3 is higher than the top of the motor housing 1. The scooter plate 3 is arranged in the up and down direction and is connected to the gearbox body 2. A cooling air duct 8 for airflow is formed between the scooter plate 3 and the rear side surface of the motor housing 1. The motor housing 1 of the electric motorcycle is used to accommodate motor components. The motor housing 1 is arranged horizontally to facilitate the design of the motor output direction to be consistent with the original engine output direction. By setting one end of the motor housing 1 fixedly mounted in the gearbox housing 2 and arranged near the bottom surface of the inner cavity of the gearbox housing 2, while the other end extends out of the gearbox housing 2 and a ventilator 3 connected to the gearbox housing 2 is provided behind the end, one end of the motor housing 1 can be immersed in the lubricating oil at the bottom of the gearbox housing 2 in the gearbox housing 2, and the oil absorbs heat and cools the motor end. During the operation of the motorcycle, the external airflow can dissipate heat from the other end of the motor housing 1, achieving synchronous heat dissipation of both ends of the motor. At the same time, the ventilator 3 allows the airflow flowing through the surface of the motor housing 1 to enter the cooling air duct 8, so that the airflow flows vertically and cools the rear surface of the motor housing 1, thereby improving the heat dissipation effect. At the same time, the gearbox housing 2 blocked by the motor housing 1 is also cooled by air, and the temperature of the internal oil is reduced by the redirected airflow. In this way, the oil cooling and air cooling are fully combined to achieve a better and more reliable heat dissipation and cooling effect for the motor. A connecting shaft 4 is rotatably connected within the transmission case 2. Connected to the connecting shaft 4 is a radially arranged oil-slinging portion 5 that is capable of splashing the oil within the transmission case 2 as it rotates with the connecting shaft 4. The oil-slinging portion 5 swings with the connecting shaft 4, causing the oil to splash within the transmission case 2. The splashed oil cools the motor housing 1, which is not immersed in the oil, thereby improving the cooling effect. Specifically, a transversely arranged main shaft 6 and countershaft 7 are rotatably connected within the transmission case 2. The main shaft 6 and countershaft 7 are spaced longitudinally along the motorcycle. Both the main shaft 6 and countershaft 7 include coaxially arranged gears that allow them to engage in driving engagement. The main shaft 6 is located between the countershaft 7 and the motor housing 1, and the connecting shaft 4 is located below the countershaft 7. The connecting shaft 4 includes coaxially arranged gears that allow it to engage in driving engagement with the countershaft 7. The main shaft 6 of the transmission case 2 is connected to the output end of the motor, and the secondary shaft 7 meshes and transmits the power output to the main shaft 6. This ensures a compact layout by placing the main shaft 6 close to the motor housing 1. The connecting shaft 4 is driven by the secondary shaft 7, ensuring that the connecting shaft 4 remains in operation during operation of the motorcycle, allowing for continuous cooling. Preferably, the secondary shaft 7 is positioned adjacent to the front sidewall of the interior of the transmission case 2. When the end of the oil slinger 5 moves upward from bottom to top, the oil slinger 5 can sling oil onto the inner wall of the transmission case 2 near the secondary shaft 7.In this way, the oil-slinging unit 5 slings oil onto the inner wall of the transmission case 2, creating an oil mist that lubricates the adjacent countershaft 7. This also lubricates the main shaft 6 when the countershaft 7 engages with the main shaft 6. Simultaneously, the countershaft 7 is positioned away from the motor housing 1, keeping the oil below it at a lower temperature. This resulting oil mist flows upward along the top of the transmission case 2's interior cavity, effectively cooling the unsoaked outer wall of the motor housing 1. The oil-slinging unit 5 includes an axially disposed notch 51, which communicates with the inner cavity of the oil-slinging unit 5. This facilitates the flow of oil through the notch 51 when the oil-slinging unit 5 extends, increasing the amount of oil released during upward slinging by the oil-slinging unit 5 and enhancing lubrication and cooling. A cooling oil chamber 21 is formed between the bottom surface of the transmission case and the bottom outer wall of the motor housing 1, extending around the outer periphery of the motor housing 1. Part of the cooling oil chamber 21 is located on the front side of the motor housing 1. This ensures that the oil in the cooling oil chamber 21 can fully exchange heat and cool the bottom and front sides of the motor housing 1 at that end, ensuring effective cooling. The outer surface of the motor housing 1 has heat dissipation ribs 11 arranged at intervals around the circumference. The heat dissipation ribs 11 are arranged along the axial direction of the motor housing 1. In this way, the heat dissipation ribs 11 not only increase the heat dissipation area, but also balance the temperature difference at both ends of the motor axial direction, so that the air cooling and oil cooling cooperate to achieve a more uniform cooling effect.

[0035] like Figures 1-5 、 Figure 7 As shown, the airflow plate 3 includes an air induction plate 31 with a forward-angled upper end. The upper end of the air induction plate 31 is higher than the top of the motor housing 1. The airflow plate 3 is an injection-molded part. This allows airflow flowing through the motor housing 1 from above to flow backward toward the air induction plate 31 and be guided smoothly downward by the air induction plate 31, thereby reducing airflow velocity loss and ensuring effective heat exchange. The airflow plate 3 has a deflector plate 32 at its lower end, which is angled forward. This deflector plate 32 allows airflow from the airflow plate 3 to exit closer to the outlet of the motor housing 1, fully absorbing heat from the leeward side of the motor housing 1 and improving heat exchange uniformity. The airflow plate 3 has a forward-arched protrusion 34 in the middle. The airflow plate 3 has a vertically arranged outer cover plate 33 that extends toward the motor housing 1. The outer cover plate 33 is aligned laterally with the transmission case 2, and the airflow plate 3 is connected to the inner side of the outer cover plate 33. In this way, a constriction structure can be formed between the raised portion 34 in the middle of the ventilation plate 3 and the motor housing 1, thereby increasing the local flow velocity of the airflow in this area and allowing the airflow to be sufficiently close to the motor housing 1 for heat exchange, thereby improving the cooling and heat exchange effect; the outer cover plate 33 can restrict the airflow at the ventilation plate 3, reducing the lateral escape of the airflow, thereby improving the heat exchange effect of the airflow.

[0036] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A cooling structure for a motorcycle motor, comprising a gearbox housing (2) and a motor housing (1) that is cylindrical and disposed transversely, characterized in that: One end of the motor housing (1) extends out of the gearbox housing (2); the cooling structure includes a vent plate (3) located behind the outer end of the motor housing (1) and with the plate surface facing forward; a cooling air duct (8) is formed between the vent plate (3) and the rear surface of the motor housing (1) and is connected vertically and allows air to pass through; the other end of the motor housing (1) is located in the inner cavity of the gearbox housing (2); the inner cavity of the gearbox housing (2) is rotatably connected to a transversely arranged connecting shaft (4); the connecting shaft (4) is located on the side of the motor housing (1); and a radially protruding oil-slinging portion (5) is provided on the connecting shaft (4).

2. The cooling structure of a motorcycle motor according to claim 1, characterized in that: The bottom of the motor housing (1) is arranged close to the bottom surface of the inner cavity of the gearbox housing (2).

3. The cooling structure of the motorcycle motor according to claim 2, characterized in that: A transversely arranged main shaft (6) and a secondary shaft (7) are rotatably connected in the gearbox body (2); the main shaft (6) and the secondary shaft (7) are spaced apart in the longitudinal direction of the motorcycle and can be in transmission engagement; the main shaft (6) is located between the secondary shaft (7) and the motor housing (1); and the connecting shaft (4) is located below the secondary shaft (7) and is in transmission engagement with the secondary shaft (7).

4. The cooling structure of a motorcycle motor according to claim 3, characterized in that: The secondary shaft (7) is arranged adjacent to the inner cavity side wall of the gearbox body (2) in the longitudinal direction.

5. The cooling structure of a motorcycle motor according to claim 1, 2, 3 or 4, characterized in that: The oil-slinging portion (5) is tubular and has a notch (51) arranged along the axial direction, and the notch (51) is communicated with the inner cavity of the oil-slinging portion (5).

6. The cooling structure of a motorcycle motor according to claim 1, 2, 3 or 4, characterized in that: A cooling oil cavity (21) arranged around the outer periphery of the motor housing (1) is formed between the inner cavity bottom surface of the gearbox housing (2) and the bottom outer wall of the motor housing (1), and part of the cooling oil cavity (21) is located on the front side of the motor housing (1).

7. The cooling structure of a motorcycle motor according to claim 1, 2, 3 or 4, characterized in that: The outer surface of the motor housing (1) has heat dissipation ribs (11) arranged at intervals around the circumference, and the heat dissipation ribs (11) are arranged along the axial direction of the motor housing (1).

8. The cooling structure of a motorcycle motor according to claim 1, 2, 3 or 4, characterized in that: The ventilation plate (3) comprises an air induction plate (31) with an upper end inclined forward, and the upper end of the air induction plate (31) is higher than the top of the motor housing (1).

9. The cooling structure of a motorcycle motor according to claim 8, characterized in that: The lower end of the wind-blowing plate (3) is provided with a guide plate (32) with its lower end tilted forward.

10. The cooling structure of a motorcycle motor according to claim 1, 2, 3 or 4, characterized in that: The middle portion of the air vent plate (3) has a protruding portion (34) arched forward; the cooling structure also includes an outer cover plate (33) arranged vertically and extending forward, the air vent plate (3) is connected to the inner side of the outer cover plate (33), and the outer cover plate (33) is horizontally opposite to the position of the cooling air duct (8).

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