Motorcycle engine

Abstract

The utility model provides a motorcycle engine, and belongs to the technical field of motorcycles. The clutch electric actuator solves the problem of how to improve the balance of an engine while ensuring that the clutch electric actuator does not additionally expand the occupied space of the engine. The motorcycle engine comprises a machine case, a front cylinder body, a rear cylinder body, a clutch pull rod and an air filter, a clutch electric actuator used for driving the clutch pull rod to move is fixedly arranged outside the machine case, and an inwards-concave installation space is formed between the air filter and the top face of the machine case. The clutch electric actuator is positioned in the mounting space and is arranged in parallel with the rear cylinder body in the left-right direction; the clutch electric actuator comprises a motor and a transmission case, the motor is arranged in the front-back direction, the rear end of the motor is connected with the transmission case, and the front end of the motor extends to the position of the front cylinder body. By means of the design, the occupied space of the engine cannot be additionally enlarged, the compactness of the overall structure of the engine is guaranteed, and the balance of the engine can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of motorcycles and relates to a motorcycle engine. Background Art

[0002] A motorcycle is a two - or three - wheeled vehicle driven by a gasoline engine and steered by a handlebar to control the front wheel. It is light, flexible and fast, and is widely used for patrol, passenger and cargo transportation, etc. As the power source of a motorcycle, a motorcycle engine is a machine that converts the thermal energy generated by igniting the fuel - air mixture entering the cylinder into mechanical energy, and the power is transmitted from the crankshaft to the rear wheel of the motorcycle through a transmission mechanism to become the driving force for the vehicle to travel.

[0003] Among them, the motorcycle engine includes a box body, in which a clutch is arranged. The clutch is controlled to engage and disengage by moving a clutch pull rod. The traditional motorcycle clutch mainly adopts a manual clutch method. By manually controlling the clutch operating handle located on the handlebar to pull and release the clutch cable, the movement of the clutch pull rod is controlled, so as to complete the engagement and disengagement actions of the clutch. However, in this way, the cable is relatively long, and when the cable is arranged, it needs to be bent multiple times along the positions and spaces adapted to the motorcycle. The cable is prone to wear and breakage during operation, resulting in insufficient separation and engagement of the clutch, and even causing problems such as clutch damage.

[0004] Therefore, in the prior art, those skilled in the art often drive the clutch pull rod to move for the clutch engagement and disengagement action by setting a clutch electric actuator. The clutch electric actuator includes a motor and a transmission mechanism. The motor shaft of the motor is connected to the pull rod of the clutch through the transmission mechanism to automatically pull the clutch for engagement and disengagement. However, due to the limited overall installation space of the motorcycle engine and the very crowded space between each component, after adding the above - mentioned clutch electric actuator, the engine will become very bulky, resulting in an increase in the installation space occupied by the engine, and it will also affect the structural balance of the engine. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a motorcycle engine in view of the above - mentioned problems existing in the prior art. The technical problem to be solved by the utility model is how to improve the balance of the engine while ensuring that the clutch electric actuator does not additionally expand the space occupied by the engine.

[0006] The purpose of the present utility model can be achieved by the following technical solutions: A motorcycle engine includes a chassis, a front cylinder block, a rear cylinder block, a clutch pull rod, and an air filter. The front cylinder block and the rear cylinder block are fixed on the top surface of the chassis in the front-rear direction. The air filter is fixedly arranged above the chassis and on one side of the rear cylinder block in the left-right direction. An electric clutch actuator for driving the clutch pull rod to move is fixedly arranged outside the chassis. It is characterized in that an inwardly concave installation space is provided between the air filter and the top surface of the chassis. The electric clutch actuator is located in the installation space and is arranged side by side with the rear cylinder block in the left-right direction. The electric clutch actuator includes a motor and a transmission case. The motor is arranged in the front-rear direction. The rear end of the motor is connected to the transmission case, and the front end of the motor extends towards the position where the front cylinder block is located.

[0007] The present utility model rationally develops and utilizes the engine space, and combines with the layout design of the position of the electric clutch actuator, so as to improve the balance of the engine without additionally expanding the occupied space of the engine. Specifically, since an air filter is installed on a motorcycle engine, on this basis, the surrounding free space brought by the air filter itself is utilized. By designing an installation space between the air filter and the top surface of the chassis, a position is provided for the installation of the electric clutch actuator, and the installation space is inwardly concave, so that the electric clutch actuator installed therein will not additionally expand the installation space of the engine. At the same time, since the electric clutch actuator is arranged side by side with the rear cylinder block in the left-right direction, the weight balance of the overall engine structure in the left-right direction is ensured. Moreover, by arranging the motor of the electric clutch actuator in the front-rear direction and the front end extending towards the position of the front cylinder block, the weight balance of the overall engine structure in the front-rear direction is ensured, thereby using the addition of the electric clutch actuator to improve the balance of the engine in the front-rear direction and the left-right direction. Therefore, through the above design, not only the occupied space of the engine is not additionally expanded, but also the balance of the engine is improved.

[0008] In the above-mentioned motorcycle engine, the air filter includes an air filter housing. The lower side of the air filter housing has a notch communicating with the installation space, and part of the motor is located in the notch. Through the above design, the free space inside the air filter housing is also rationally utilized, so that not only the occupied space of the engine is not additionally expanded, but also the overall structure of the engine is more compact.

[0009] In the above motorcycle engine, the housing of the motor is L-shaped. The rear end of the housing of the motor is connected to the transmission case, and the front end of the housing of the motor is located between the front cylinder block and the rear cylinder block. Through the above design of the shape and arrangement position of the motor housing, the space between the front cylinder block and the rear cylinder block is reasonably utilized, so that not only the occupied space of the engine is not additionally enlarged, but also the installation compactness is further improved. At the same time, it also makes the center of gravity of the engine closer to the middle, further ensuring the structural balance of the engine.

[0010] In the above motorcycle engine, the clutch electric actuator further includes a drive shaft. The chassis includes a box body and a clutch side cover fixedly connected to one side of the box body. A communication hole communicating the installation space and the internal space of the box body is provided on the top surface of the clutch side cover. The lower end of the drive shaft passes through the communication hole and extends into the box body and is in transmission connection with the clutch pull rod. Through the above design, the spare space inside the clutch side cover is reasonably utilized, so that the drive shaft is not exposed, thereby ensuring the compactness of the engine.

[0011] In the above motorcycle engine, the clutch electric actuator further includes a housing fixed outside the transmission case. The outer sides of the housing, the air filter housing, and the clutch side cover are flush with each other in the left-right direction. Through the above design, the added and installed clutch electric actuator does not enlarge the space occupied by the original overall structure of the engine.

[0012] In the above motorcycle engine, a worm arranged in the front-rear direction and a drive shaft whose axis is perpendicular to the axis of the worm are respectively rotatably connected in the transmission case. The worm is in transmission connection with the motor shaft of the motor. The upper end of the drive shaft has a turbine, and the turbine is in meshing connection with the worm. The lower end of the drive shaft extends out of the transmission case and has a drive gear. A plurality of tooth grooves are provided on the clutch pull rod, and the drive gear is in meshing connection with the tooth grooves. The above self-driving transmission principle is as follows: The motor drives the worm to rotate. The worm drives the drive shaft to rotate through the turbine transmission. Then the drive shaft drives the clutch pull rod to move through the cooperation of the gear and the tooth grooves, thereby realizing the clutch engagement and disengagement control. At the same time, the above-mentioned worm and drive shaft are arranged vertically in this way, which is beneficial to improving the installation compactness of the clutch electric actuator.

[0013] In the above motorcycle engine, the drive shaft includes an upper half shaft, a middle shaft sleeve, and a lower half shaft. The turbine is located on the upper half shaft, and the drive gear is located on the lower half shaft. The lower end of the upper half shaft and the upper end of the lower half shaft are respectively inserted into both ends of the middle shaft sleeve and are circumferentially positioned with both ends of the middle shaft sleeve through splines. There is a gap between the lower end of the upper half shaft and the upper end of the lower half shaft. Through the above segmented design of the drive shaft and the use of the middle shaft sleeve and spline connection to form a gap between the upper and lower half shafts, the length of the drive shaft can be telescopically adjusted, thus facilitating the installation and cooperation of the drive gear and the pull rod tooth groove, and further improving the convenience of installing the self-driving device of this clutch. Moreover, after the above adjustment, it is also beneficial to ensure the accuracy of the connection and cooperation between the drive shaft and the clutch pull rod.

[0014] In the above motorcycle engine, on the top surface of the engine case, there is a columnar connecting seat one arranged vertically, and the transmission case is fixed on the connecting seat one. Through the above design of the connecting seat one, the connection position between the transmission case and the engine case is elevated. On the one hand, it facilitates the installation and connection of the transmission case; on the other hand, the elevated transmission case is beneficial to improving the structural balance of the engine in the vertical direction.

[0015] In the above motorcycle engine, there are two connecting seats one arranged at intervals in the front-rear direction. On the side of the transmission case close to the rear cylinder block, there is a plate-shaped connecting portion arranged horizontally, and the connecting portion is fixedly connected to the connecting seat one. Through the above design, the space between the transmission case and the rear cylinder block can be reasonably utilized, which is beneficial to improving the installation compactness.

[0016] In the above motorcycle engine, on the top surface of the engine case, there is a columnar connecting seat two arranged vertically, and on the transmission case, there is a connecting column extending downward in the vertical direction, and the connecting column is fixedly connected to the connecting seat two. Through the above design, the connection position between the transmission case and the engine case is elevated. On the one hand, it facilitates the installation and connection of the transmission case; on the other hand, the elevated transmission case is beneficial to improving the structural balance of the engine in the vertical direction.

[0017] Compared with the prior art, the motorcycle engine has the following advantages: By reasonably developing and utilizing the space where the air filter is located and combining with the ingenious layout design of the position of the clutch electric actuator, after adding the clutch actuator, not only will it not additionally expand the space occupied by the engine, ensuring the compactness of the overall structure of the engine, but it is also beneficial to improving the balance of the engine. Brief Description of the Drawings

[0018] Figure 1 It is a partial three-dimensional structural schematic diagram of the motorcycle engine.

[0019] Figure 2It is a partial three-dimensional structural schematic diagram of the engine with the clutch electric actuator hidden.

[0020] Figure 3 It is a partial three-dimensional structural schematic diagram of the engine with the housing hidden.

[0021] Figure 4 It is a partial three-dimensional structural schematic diagram of the engine with the air filter and the housing hidden Figure 1 。

[0022] Figure 5 It is a partial three-dimensional structural schematic diagram of the engine with the air filter and the housing hidden Figure 2 。

[0023] Figure 6 It is an exploded structural schematic diagram of some components of the engine of this motorcycle after hiding the clutch side cover, the transmission case, etc.

[0024] Figure 7 It is a structural schematic diagram of the engine of this motorcycle after hiding the clutch side cover, the transmission case, etc.

[0025] In the figure, 1 is the chassis; 11 is the box body; 12 is the clutch side cover; 12a is the communication hole; 121 is the first connecting seat; 122 is the second connecting seat; 2 is the front cylinder block; 3 is the rear cylinder block; 4 is the clutch pull rod; 41 is the tooth groove; 5 is the air filter; 51 is the air filter housing; 511 is the notch; 6 is the clutch electric actuator; 6a is the housing; 61 is the motor; 62 is the transmission case; 621 is the connecting part; 622 is the connecting column; 63 is the drive shaft; 631 is the upper half shaft; 632 is the middle shaft sleeve; 633 is the lower half shaft; 64 is the worm; 65 is the turbine; 66 is the drive gear; 7 is the spline; 8 is the gap; a is the installation space. Specific Embodiments

[0026] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0027] Specifically, as Figure 1 shown, the engine of this motorcycle includes a chassis 1, a front cylinder block 2, a rear cylinder block 3, a clutch pull rod 4, an air filter 5, and a clutch electric actuator 6 fixedly arranged outside the chassis 1 and used to drive the clutch pull rod 4 to move. The front cylinder block 2 and the rear cylinder block 3 are fixedly arranged on the top surface of the chassis 1 in the front-rear direction, and the air filter 5 is fixedly arranged above the chassis 1 and on one side of the rear cylinder block 3 in the left-right direction. As Figure 2 and Figure 3As shown, there is an inwardly recessed installation space a between the air filter 5 and the top surface of the chassis 1. The clutch electric actuator 6 is located within the installation space a and is arranged side by side with the rear cylinder block 3 in the left-right direction. The clutch electric actuator 6 includes a motor 61 and a transmission case 62. The motor 61 is arranged in the front-rear direction, and the rear end of the motor 61 is connected to the transmission case 62. The rear end of the motor 61 extends forward towards the position of the front cylinder block 2. The air filter 5 includes an air filter housing 51. The lower side of the air filter housing 51 has a notch 511 communicating with the installation space a. A part of the motor 61 passes through the notch 511 and is located within the air filter housing 51. The clutch electric actuator 6 further includes a housing 6a fixed outside the transmission case 62. The outer sides of the housing 6a, the air filter housing 51, and the clutch side cover 12 are flush with each other in the left-right direction.

[0028] Again, Figure 4 and Figure 5 As shown, in this embodiment, the housing of the motor 61 is L-shaped. The rear end of the housing of the motor 61 is connected to the transmission case 62. The front end of the housing of the motor 61 is located between the front cylinder block 2 and the rear cylinder block 3. The chassis 1 includes a box body 11 and a clutch side cover 12 fixedly connected to one side of the box body 11. On the top surface of the clutch side cover 12, there are two columnar connection seats one 121 arranged vertically and spaced apart in the front-rear direction. The connection part 621 of the transmission case 62, which is plate-shaped and arranged horizontally, is fixedly connected to the connection seat one 121. On the top surface of the clutch side cover 12, there is a columnar connection seat two 122 arranged vertically. The transmission case 62 has a connection column 622 extending vertically downward, and the connection column 622 is fixedly connected to the connection seat two 122.

[0029] More specifically, as Figure 2 、 Figure 6 and Figure 7 shown, on the top surface of the clutch side cover 12, there is a communication hole 12a communicating the installation space a and the internal space of the box body 11. Inside the transmission case 62, a worm 64 arranged in the front-rear direction and a drive shaft 63 whose axis is perpendicular to the axis of the worm 64 are respectively rotatably connected. The worm 64 is in transmission connection with the motor shaft of the motor 61. The drive shaft 63 includes an upper half shaft 631, a middle shaft sleeve 632, and a lower half shaft 633. The lower end of the upper half shaft 631 and the upper end of the lower half shaft 633 are respectively inserted into both ends of the middle shaft sleeve 632 and are circumferentially positioned with both ends of the middle shaft sleeve 632 through splines 7. There is a gap 8 between the lower end of the upper half shaft 631 and the upper end of the lower half shaft 633. The lower end of the lower half shaft 633 passes through the communication hole 12a and extends into the box body 11. The upper end of the upper half shaft 631 has a turbine 65, and the lower end of the lower half shaft 633 has a drive gear 66. The turbine 65 is in meshing connection with the worm 64. A number of tooth grooves 41 are provided on the clutch pull rod 4, and the drive gear 66 is in meshing connection with the tooth grooves 41.

[0030] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0031] Although terms such as chassis 1, box body 11, clutch side cover 12, communication hole 12a, first connecting seat 121, second connecting seat 122, front cylinder block 2, rear cylinder block 3, clutch pull rod 4, tooth groove 41, air filter 5, air filter housing 51, notch 511, clutch electric actuator 6, actuator housing 6a, motor 61, transmission box 62, connecting portion 621, connecting column 622, drive shaft 63, upper half shaft 631, middle shaft sleeve 632, lower half shaft 633, worm 64, turbine 65, drive gear 66, spline 7, gap 8, installation space a are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A motorcycle engine, comprising a chassis (1), a front cylinder block (2), a rear cylinder block (3), a clutch pull rod (4) and an air filter (5). The front cylinder block (2) and the rear cylinder block (3) are fixed on the top surface of the chassis (1) in the front-rear direction. The air filter (5) is fixedly arranged above the chassis (1) and on one side of the rear cylinder block (3) in the left-right direction. An electric clutch actuator (6) for driving the movement of the clutch pull rod (4) is fixedly arranged outside the chassis (1), and is characterized in that, There is an inwardly recessed installation space (a) between the air filter (5) and the top surface of the chassis (1). The clutch electric actuator (6) is located within the installation space (a) and is arranged side by side with the rear cylinder block (3) in the left-right direction. The clutch electric actuator (6) includes a motor (61) and a transmission case (62). The motor (61) is arranged in the front-rear direction, the rear end of the motor (61) is connected to the transmission case (62), and the front end of the motor (61) extends forward towards the position of the front cylinder block (2).

2. The motorcycle engine according to claim 1, characterized in that, The air filter (5) includes an air filter housing (51). The lower side of the air filter housing (51) has a notch (511) communicating with the installation space (a), and a part of the motor (61) is located within the notch (511).

3. The motorcycle engine according to claim 1 or 2, characterized in that, The housing of the motor (61) is L-shaped. The rear end of the housing of the motor (61) is connected to the transmission case (62), and the front end of the housing of the motor (61) is located between the front cylinder block (2) and the rear cylinder block (3).

4. The motorcycle engine according to claim 2, characterized in that, The clutch electric actuator (6) further includes a drive shaft (63). The chassis (1) includes a box body (11) and a clutch side cover (12) fixedly connected to one side of the box body (11). A communication hole (12a) communicating the installation space (a) and the internal space of the box body (11) is provided on the top surface of the clutch side cover (12). The lower end of the drive shaft (63) passes through the communication hole (12a) and extends into the box body (11) to be in transmission connection with the clutch pull rod (4).

5. The motorcycle engine according to claim 4, characterized in that, The clutch electric actuator (6) further includes a housing (6a) fixed outside the transmission case (62). The outer sides of the housing (6a), the air filter housing (51), and the clutch side cover (12) are flush with each other in the left-right direction.

6. The motorcycle engine according to claim 1 or 2, characterized in that, A worm (64) arranged in the front-rear direction and a drive shaft (63) whose axis is perpendicular to the axis of the worm (64) are respectively rotatably connected within the transmission case (62). The worm (64) is in transmission connection with the motor shaft of the motor (61). The upper end of the drive shaft (63) has a turbine (65). The turbine (65) is meshed and connected with the worm (64). The lower end of the drive shaft (63) extends out of the transmission case (62) and has a drive gear (66). A plurality of tooth grooves (41) are provided on the clutch pull rod (4). The drive gear (66) is meshed and connected with the tooth grooves (41).

7. The motorcycle engine according to claim 6, wherein, The drive shaft (63) includes an upper half shaft (631), a middle shaft sleeve (632), and a lower half shaft (633). The turbine (65) is located on the upper half shaft (631), and the drive gear (66) is located on the lower half shaft (633). The lower end of the upper half shaft (631) and the upper end of the lower half shaft (633) are respectively inserted into both ends of the middle shaft sleeve (632) and are circumferentially positioned with both ends of the middle shaft sleeve (632) through splines (7). There is a gap (8) between the lower end of the upper half shaft (631) and the upper end of the lower half shaft (633).

8. The motorcycle engine according to claim 1 or 2 or 4 or 5, characterized in that, On the top surface of the chassis (1), there is a columnar connecting seat one (121) arranged vertically. The transmission case (62) is fixed on the connecting seat one (121).

9. The motorcycle engine according to claim 8, characterized in that, There are two connecting seats one (121) arranged at intervals in the front-rear direction. On the side of the transmission case (62) close to the rear cylinder block (3), there is a connecting portion (621) in the shape of a plate arranged in the horizontal direction, and the connecting portion (621) is fixedly connected to the connecting seat one (121).

10. The motorcycle engine according to claim 1 or 2 or 4 or 5, characterized in that, On the top surface of the chassis (1), there is a connecting seat two (122) in the shape of a column arranged in the vertical direction. On the transmission case (62), there is a connecting column (622) extending downward in the vertical direction, and the connecting column (622) is fixedly connected to the connecting seat two (122).

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