Motorcycle power transmission mechanism

Abstract

The invention discloses a power transmission mechanism of a motorcycle, comprising a main transmission assembly and a secondary transmission assembly connected by a transmission belt, wherein the main transmission assembly comprises a first rotating shaft, the first rotating shaft is connected to a power input assembly, a first wind wheel is fixedly connected to the first rotating shaft, one side of the first wind wheel has a first conical surface, a driving wheel is movably arranged on the first rotating shaft, a second conical surface is arranged on the side of the driving wheel corresponding to the first wind wheel, the transmission belt passes through between the first and second conical surfaces, a tray is arranged on the other side of the driving wheel, a third conical surface is arranged on the side corresponding to the tray, an inclined hole is circumferentially opened on the third conical surface, a sliding guide column is arranged in the inclined hole, and when the guide column is disengaged from the inclined hole, it can be against the tray. The invention has a simple structure, a reasonable design, a large driving force, and can realize fast and accurate transmission of motorcycle power.

Description

Technical Field

[0001] The invention relates to motorcycle equipment, in particular to a power transmission mechanism of a motorcycle. Background Art

[0002] As a light means of transportation, motorcycles have been widely used in our daily lives. When the power handle of a traditional motorcycle is turned, the engine is controlled to move, and the wheels are rotated through a power transmission mechanism. The power transmission mechanism of a traditional motorcycle mainly includes a first rotating shaft, a second rotating shaft and a transmission belt. The first rotating shaft is connected to a power input component, a first wind wheel is connected to the first rotating shaft, one side of the first wind wheel has a first conical surface, a driving wheel is movably arranged on the first rotating shaft, and a second conical surface is arranged on the side of the driving wheel corresponding to the first wind wheel. A tray is provided on the other side of the wheel, a second wind wheel is connected to the second rotating shaft, a third conical surface is provided on one side of the second wind wheel, a driven wheel is movably provided on the second rotating shaft, a fourth conical surface corresponding to the third conical surface is provided on the driven wheel, a transmission belt passes through between the first and second conical surfaces and between the third and fourth conical surfaces respectively, a transmission member is movably connected to one side of the driven wheel on the second rotating shaft, a first spring is tightly provided between the transmission member and the driven wheel, a power transmission member that can be transmission-connected to the transmission member is provided on one side of the transmission member, and the power transmission member is transmission-connected to the wheel.

[0003] In the above structure, the driving wheel of the traditional structure is a strip groove obliquely opened on the driving wheel, and a roller is movably arranged in the strip groove. When the first rotating shaft drives the driving wheel to rotate, the roller will move outward under the action of centrifugal force and squeeze the tray. The driving wheel will approach the first wind wheel under the reaction force of the roller, so that the gap between the first and second conical surfaces becomes smaller. At this time, the winding radius of the transmission belt that passes around the first and second conical surfaces becomes larger. Since the overall size of the transmission belt remains unchanged, the winding radius of the transmission belt that passes around the third and fourth conical surfaces will become smaller, thereby squeezing and driving the driven wheel to move toward one side of the transmission member and squeezing the transmission member into the power transmission member to realize power transmission. However, it is found in actual use that the force provided by the roller movement is insufficient, which easily leads to the driving wheel not moving into place. In addition, due to the certain friction between the roller and the groove, its startup sensitivity is poor and the startup feedback is slow. In addition, when the roller rotates to different angles with the rotating wheel, it may also be affected by gravity, resulting in its pushing force becoming smaller. Summary of the invention

[0004] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a power transmission mechanism for a motorcycle which has a simple structure, a reasonable design and can achieve a large power output transmission force of the motorcycle.

[0005] To this end, the present invention is implemented by adopting the following scheme:

[0006] The power transmission mechanism of a motorcycle includes a main transmission component and a sub-transmission component connected by a transmission belt, the main transmission component includes a first rotating shaft, the first rotating shaft is connected to a power input component, a first wind wheel is connected to the first rotating shaft, one side of the first wind wheel has a first conical surface, a driving wheel is movably arranged on the first rotating shaft, a second conical surface is arranged on the side of the driving wheel corresponding to the first wind wheel, the transmission belt passes between the first and second conical surfaces, and a tray is arranged on the other side of the driving wheel, characterized in that: the driving wheel is provided with a third conical surface on the side corresponding to the tray, an inclined hole is circumferentially opened on the third conical surface, a sliding guide column is arranged in the inclined hole, and when the guide column is released from the inclined hole, it can be abutted against the tray.

[0007] The top of the guide post is in a ball head shape.

[0008] The tray is provided with an annular groove which can be matched with the top ball head of the guide column.

[0009] The guide column is composed of a metal sleeve and a plastic part, and the metal sleeve is embedded in the plastic part.

[0010] The auxiliary transmission assembly includes a second rotating shaft, a second wind wheel is connected to the second rotating shaft, a fourth conical surface is provided on one side of the second wind wheel, a driven wheel is movably provided on the second rotating shaft, a fifth conical surface corresponding to the fourth conical surface is provided on the driven wheel, the transmission belt passes between the fourth and fifth conical surfaces, a transmission member is movably connected to one side of the driven wheel on the second rotating shaft, a first spring is tightly provided between the transmission member and the driven wheel, a power transmission member that can be transmission-connected to the transmission member is provided on one side of the transmission member, and the power transmission member is transmission-connected to the wheel.

[0011] The transmission member includes an annular movable plate, on which a friction block is circumferentially arranged, one end of the friction block is connected to the second spring, and the other end is hinged to the annular movable plate, and an opening is arranged on one side of the power transmission member corresponding to the annular movable plate, and the annular movable plate can be moved into the opening of the power transmission member, and at this time, the inner wall of the power transmission member can cooperate with the friction block to compress the transmission.

[0012] The other side of the first wind wheel and the second wind wheel is provided with fan blades.

[0013] The key on the first rotating shaft is connected with a sleeve, and the driving wheel key is connected to the outer side wall of the sleeve.

[0014] The transmission belt is a V-belt.

[0015] By adopting the above technical scheme, the advantages of the present invention are as follows: when the motorcycle engine is just started, the motorcycle is in an idling state. At this time, the first rotating shaft rotates with the first wind wheel, and the transmission belt is wound around the first transmission shaft. At the same time, one side of the transmission belt contacts the first conical surface, and the other side contacts the second conical surface of the driving wheel. Since the rotation speed in the idling state is very slow, the centrifugal force is not enough to throw out the guide post on the driving wheel; when the throttle is increased and the rotation speed of the motorcycle engine increases to a certain extent, the driving wheel increases its rotation speed under the friction force of the transmission belt. When a certain rotation speed is reached, there is enough centrifugal force to throw out the guide post on the driving wheel. The tray is supported, and the force of the tray on the guide column applies a side wall force to the guide column to the inclined hole, which will not cause the guide column to shrink along the inclined hole, thereby pushing the driving wheel toward the first wind wheel, so that the distance between the first and second conical surfaces becomes smaller, causing the transmission belt wrapped between the wind wheel and the driving wheel to move outward along the diameter of the driving wheel, thereby transmitting power to the auxiliary transmission component to drive the wheels of the motorcycle to rotate and realize the starting movement; this structure that uses the guide column in the inclined hole to squeeze the driving wheel has a greater transmission force and is more sensitive, can ensure the rapid transmission of motorcycle power, and realize the rapid start and driving of the motorcycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention has the following accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a structural diagram of the driving wheel of the present invention;

[0019] Figure 3 A structural diagram of a tray of the present invention;

[0020] Figure 4 A plan view of the annular movable plate of the present invention;

[0021] Figure 5 It is a structural diagram of the guide column of the present invention. DETAILED DESCRIPTION

[0022] As shown in the figure, the power transmission mechanism of the motorcycle disclosed in the present invention includes a main transmission assembly and a sub-transmission assembly connected by a transmission belt 3. In this embodiment, the transmission belt 3 is a V-belt. The main transmission assembly includes a first rotating shaft 7, which is connected to the power input assembly. In this embodiment, the power input assembly includes a crank 9, which is connected to the first rotating shaft 7. A first wind wheel 1 is connected to the first rotating shaft 7. One side of the first wind wheel 1 has a first conical surface 2. A driving wheel 5 is movably arranged on the first rotating shaft 7. A second conical surface 4 is arranged on the side of the driving wheel 5 corresponding to the first wind wheel 1. The transmission belt 3 passes through between the first and second conical surfaces. A tray 6 is arranged on the other side of the driving wheel 5. The driving wheel 5 is provided with a third conical surface 19 on the side corresponding to the tray 6. An inclined hole 20 is circumferentially opened on the third conical surface 19. A sliding guide column 21 is arranged in the inclined hole 20. When the guide column 21 is released from the inclined hole 20, it can be against the tray 6. Furthermore, the guide post 21 is composed of a metal sleeve 25 and a plastic part, and the metal sleeve 25 is embedded in the plastic part, which effectively increases the weight of the guide post 21, increases the centrifugal force when it rotates, and improves the extrusion force of the guide post 21. The top of the guide post 21 is in the shape of a ball head, and the tray 6 is provided with an annular groove 24 that can be tightly matched with the ball head of the top of the guide post 21, so that the guide post 21 and the tray 6 are convenient for pressing and fitting. At the same time, when the guide post 21 contacts the tray 6 during the rotation of the driving wheel 5, the guide post 21 can also rotate. After the guide post 21 rotates, the side wall of the guide post 21 can change its position and contact the hole wall of the inclined hole 20, so as to avoid the fixed position of the side wall of the guide post 21 from contacting the hole wall of the inclined hole 20, so as to improve its service life. The auxiliary transmission assembly includes a second rotating shaft 17, a second wind wheel 10 is connected to the second rotating shaft 17, a fourth conical surface 11 is provided on one side of the second wind wheel 10, a driven wheel 13 is movably provided on the second rotating shaft 17, a fifth conical surface 12 corresponding to the fourth conical surface 11 is provided on the driven wheel 13, the transmission belt 3 passes through the fourth and fifth conical surfaces, a transmission member is movably connected to one side of the driven wheel 13 on the second rotating shaft 17, a first spring 14 is tightly provided between the transmission member and the driven wheel 13, a power transmission member 18 which can be connected to the transmission member is provided on one side of the transmission member, the power transmission member 18 can pass through the second rotating shaft 17 and will not be The second rotating shaft 17 drives, specifically, the transmission member includes an annular movable plate 16, on which a friction block 15 is circumferentially arranged, one end of the friction block 15 is connected to the second spring 26, and the other end is hinged to the annular movable plate 16, and an opening is arranged on the side corresponding to the annular movable plate 16 of the power transmission member 18, the annular movable plate 16 can be moved into the power transmission member 18, and at this time the inner wall of the power transmission member 18 can cooperate with the friction block 15 for compression transmission, further, a pin shaft passing through the friction block 15 is arranged on the annular movable plate 16, and the friction block 15 is hinged to the annular movable plate 16, and the power transmission member 18 is connected to the wheel transmission.The other side of the first wind wheel 1 and the second wind wheel 10 is provided with a fan blade 22, so that it has a heat dissipation function. When the driving wheel 5 is installed on the first transmission shaft 7, the inner hole of the driving wheel 5 will always contact the first rotating shaft 7, which will cause the first rotating shaft 7 to wear after long-term use, and the cost of replacing the first rotating shaft 7 is expensive. Therefore, a sleeve 23 is mounted on the first rotating shaft 7, and the driving wheel 5 is mounted on the sleeve 23. When the sleeve 23 is worn, it only needs to be replaced, which makes it easier to replace parts.

[0023] During installation, the tray 6 is first put on the first rotating shaft 7, which has a flange 25, and then the sleeve 23 is put on, and then the driving wheel 5 is put on the sleeve 23, and finally the first wind wheel 1 is put on. One end of the sleeve 23 supports the tray 6, and the other end supports the first wind wheel 1. After the first wind wheel 1 is installed, the nut 24 is tightened on the threaded rod at the end of the first rotating shaft. After the nut 24 is tightened, the first wind wheel 1, the sleeve 23 and the tray 6 can be tightened, so that the first wind wheel 1, the sleeve 23 and the tray 6 can rotate with the first rotating shaft.

[0024] The first rotating shaft 7 is the output end of the crankshaft. When the motorcycle engine is working, the transmission connecting rod 9 reciprocates the crankshaft, so that the output shaft, i.e., the first rotating shaft 7, rotates. Therefore, replacing the first rotating shaft 7 requires replacing the entire crankshaft, which is costly.

[0025] The working principle of the present invention is as follows: when the engine of the rotating motorcycle is just started, the motorcycle is in an idling state. At this time, the first rotating shaft 7 rotates with the first wind wheel 1, and the transmission belt 3 is wound around the first transmission shaft 7. At the same time, one side of the transmission belt 3 contacts the first conical surface 2 of the first wind wheel 1, and the other side contacts the second conical surface 4 of the driving wheel 5. Therefore, in the idling state, the transmission belt 3 rotates with the driving wheel; since the rotation speed in the idling state is very slow, its centrifugal force is not enough to throw out the guide post 21 on the driving wheel 5; when the throttle is increased and the rotation speed of the motorcycle engine increases to a certain extent, the driving wheel 5 increases its rotation speed under the friction force of the transmission belt 3. When a certain rotation speed is reached, there is enough centrifugal force to throw out the guide post 21 on the driving wheel 5 and hold the tray 6. The force of the tray 6 on the guide post 21 applies a side wall force to the guide post 21 to the inclined hole 20, which will not cause the guide post 21 to shrink along the inclined hole 20, thereby pushing the driving wheel 5. Approaching the first wind wheel 1, the spacing between the first and second conical surfaces becomes smaller, and the transmission belt 3 moves outward along the diameter direction of the driving wheel 5, that is, the radius of the transmission belt wrapped around the first and second conical surfaces becomes larger. Since the overall size of the transmission belt 3 remains unchanged, this will force the transmission belt 3 passing around the third and fourth conical surfaces to move inward along the diameter of the driven wheel 13, that is, the radius of the transmission belt 3 passing around the third and fourth conical surfaces becomes smaller. Therefore, when the transmission belt 3 is squeezed into between the third and fourth conical surfaces, the transmission belt 3 will squeeze the driven wheel 13 to move toward one side of the power transmission member 18 and squeeze the annular movable plate 16 into the power transmission member 18. Since the annular movable plate 16 will also rotate at the same time, the friction block 15 on the annular movable plate 16 will also be thrown outward under the action of centrifugal force, and cooperate with the inner wall of the power transmission member 18 to press tightly, and drive the power transmission member 18 to rotate, thereby driving the wheel to rotate, thereby realizing power transmission.

[0026] In the structure of the present invention, since the driving wheel 5 has an inclined hole 5 and a guide column 21 is installed in the inclined hole, when the driving wheel 5 accelerates, the centrifugal force is used to drive the guide column 21 to move and cooperate with the tray to squeeze the driving wheel 5 to achieve the movement of the driving wheel 5. The force applied is greater and the feedback is more sensitive, thereby achieving rapid transmission of motorcycle power and allowing the motorcycle to start and run quickly.

Claims

1. A power transmission mechanism for a motorcycle, comprising a main transmission assembly and a secondary transmission assembly connected by a transmission belt (3), the main transmission assembly comprising a first rotating shaft (7), the first rotating shaft (7) being connected to a power input assembly, a first wind wheel (1) being fixedly connected to the first rotating shaft (7), one side of the first wind wheel (1) having a first conical surface (2), a driving wheel (5) being movably arranged on the first rotating shaft (7), a second conical surface (4) being arranged on a side of the driving wheel (5) corresponding to the first wind wheel (1), the transmission belt (3) passing between the first and second conical surfaces, a tray (6) being arranged on the other side of the driving wheel (5), characterized in that: The driving wheel (5) is provided with a third conical surface (19) on a side corresponding to the tray (6), and an inclined hole (20) is circumferentially opened on the third conical surface (19). A sliding guide post (21) is provided in the inclined hole (20). When the guide post (21) is released from the inclined hole (20), it can abut against the tray (6). The top of the guide post (21) is in the shape of a ball head. The tray (6) is provided with an annular groove (24) that can cooperate with the ball head of the top of the guide post (21). The first rotating shaft (7) is sleeved with a sleeve (23), and the driving wheel (5) is sleeved on the sleeve. The guide post (21) is composed of a metal sleeve (25) and a plastic part. The metal sleeve (25) is embedded in the plastic part. The transmission belt (3) is a V-belt.

2. The power transmission mechanism of a motorcycle according to claim 1, characterized in that The auxiliary transmission assembly comprises a second rotating shaft (17), a second wind wheel (10) is fixedly connected to the second rotating shaft (17), one side of the second wind wheel (10) has a fourth conical surface (11), a driven wheel (13) is movably arranged on the second rotating shaft (17), a fifth conical surface (12) corresponding to the fourth conical surface (11) is arranged on the driven wheel (13), the transmission belt (3) passes between the fourth and fifth conical surfaces, a transmission member is movably connected to one side of the driven wheel (13) on the second rotating shaft (17), a first spring (14) is tightly arranged between the transmission member and the driven wheel (13), a power transmission member (18) which can be transmission-connected to the transmission member is arranged on one side of the transmission member, and the power transmission member (18) is transmission-connected to the wheel.

3. The power transmission mechanism of a motorcycle according to claim 2, characterized in that The transmission member comprises an annular movable plate (16), a friction block (15) is arranged on the annular movable plate (16), one end of the friction block (15) is connected to the second spring (26), and the other end is hinged on the annular movable plate (16), and an opening is arranged on one side of the power transmission member (18) corresponding to the annular movable plate (16), and the annular movable plate (16) can be moved into the opening of the power transmission member, and at this time, the inner wall of the power transmission member (18) can cooperate with the friction block (15) to compress and transmit.

4. The power transmission mechanism of a motorcycle according to claim 3, characterized in that The other side of the first wind wheel (1) and the second wind wheel (10) is provided with fan blades (22).

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