A central shaft power output system and moped

Abstract

The utility model belongs to the technical field of moped, disclose a kind of middle shaft power output system and moped, this middle shaft power output system includes middle shaft, torque ware, clutch, transmission gear, transmission clutch shaft sleeve and ratchet ring, middle shaft is used to be connected with foot pedal, torque ware has torque inner ring and torque outer ring, torque inner ring is connected with middle shaft, torque outer ring is fixedly arranged, clutch includes clutch inner ring and clutch outer ring, clutch outer ring is ratchet ring, first ratchet on clutch inner ring is equipped with the cooperation of ratchet ring, clutch outer ring can drive clutch inner ring rotation, clutch inner ring is used to be connected with transmission sprocket, transmission gear is connected with clutch outer ring, and transmission gear is used to with drive motor transmission cooperation, transmission clutch shaft sleeve has the second ratchet of cooperation with ratchet ring, ratchet ring is connected with clutch inner ring, transmission clutch shaft sleeve is connected with torque inner ring, and can drive ratchet ring rotation. The structure of this middle shaft power output system is compact, and the integration degree is high, and the volume is relatively smaller.

Description

Technical Field

[0001] This utility model relates to the field of electric bicycle technology, and in particular to a central axis power output system and an electric bicycle. Background Technology

[0002] In current bottom bracket drive mechanisms, the sprocket is typically fixed to the bottom bracket. Power from the motor is reduced in speed by a reduction gear, then transmitted through one or more gear sets to the bottom bracket, then to the sprocket, and finally to the rear wheel via the chain, driving the electric bicycle. During riding, the force exerted by the rider's feet is transmitted through the crank to the bottom bracket, then to the sprocket, and finally to the rear wheel via the chain, driving the electric bicycle. To avoid electromagnetic resistance in the pedal-driven electric bicycle and to prevent pedal rotation during motor operation, two clutch mechanisms are required. In existing technology, one clutch mechanism is located on the motor shaft, and the other on the bottom bracket. This structure has low integration and a relatively large size. Utility Model Content

[0003] The first objective of this invention is to provide a central axis power output system that has a compact structure, high integration, and relatively small size.

[0004] The second objective of this invention is to provide a power-assisted bicycle with a high degree of integration and high transmission efficiency.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model discloses a central shaft power output system, comprising: a central shaft for connection to a foot pedal; a torque converter having an inner torque ring and an outer torque ring, the inner torque ring being connected to the central shaft and the outer torque ring being fixedly disposed; and a clutch comprising an inner clutch ring and an outer clutch ring, the outer clutch ring being a ratchet ring, the inner clutch ring having a first ratchet tooth that engages with the ratchet ring, the outer clutch ring being capable of driving the inner clutch ring to rotate, and the inner clutch ring being used to engage with a transmission chain. The clutch consists of a wheel; a transmission gear connected to the outer clutch ring, which is used to drive the drive motor; a transmission clutch bushing and a ratchet ring, the transmission clutch bushing having a second ratchet tooth that engages with the ratchet ring, the ratchet ring being connected to the inner clutch ring, and the transmission clutch bushing being connected to the inner torque ring and capable of driving the ratchet ring to rotate; wherein the meshing direction of the inner clutch ring and the outer clutch ring is opposite to the meshing direction of the transmission clutch bushing and the ratchet ring.

[0007] In some embodiments, the central shaft is provided with a first spline tooth, and the inner torque ring is provided with a first spline groove, wherein the first spline tooth and the first spline groove cooperate.

[0008] In some embodiments, the inner torque ring is provided with a second spline tooth, and the transmission clutch shaft is provided with a second spline groove, the second spline groove cooperating with the second spline tooth.

[0009] In some embodiments, the clutch inner ring is provided with a first internal thread, the ratchet ring is provided with a first external thread, and the clutch inner ring and the ratchet ring are threadedly connected; the transmission gear has a second external thread, the clutch outer ring has a second internal thread, and the transmission gear and the clutch outer ring are threadedly connected.

[0010] In some embodiments, the clutch inner ring is provided with a third spline tooth, the transmission sprocket is provided with a third spline groove, and the third spline tooth engages with the third spline groove.

[0011] In some embodiments, the central shaft power output system further includes a first bearing and a second bearing, both of which are sleeved on the central shaft and arranged axially spaced along the central shaft. The torque generator, the transmission clutch bushing, and the ratchet ring are located between the two first bearings and the second bearing.

[0012] In some embodiments, a shoulder is provided on the central shaft, the first bearing abuts against one side of the shoulder, the torque inner ring abuts against the other side of the shoulder, one end of the second bearing abuts against the transmission clutch bushing, and the other end abuts against the stop protrusion of the clutch inner ring.

[0013] In some specific embodiments, the inner ring of the clutch is further provided with an oil seal sleeved on the central shaft, and the oil seal is located on the side of the second bearing opposite to the first bearing.

[0014] In some embodiments, the transmission gear has a sleeve portion, and a third bearing is provided between the sleeve portion and the clutch inner ring.

[0015] This utility model also discloses a power-assisted bicycle, including the central shaft power output system and drive motor described above.

[0016] The beneficial effects of the central shaft power output system of this utility model are as follows: When the drive motor outputs power, it drives the transmission gear to rotate. During the rotation of the transmission gear, the outer clutch ring rotates, and the inner clutch ring rotates synchronously, causing the transmission sprocket to rotate, thus enabling the electric bicycle to move. Since the meshing direction of the inner and outer clutch rings is opposite to the meshing direction of the transmission clutch bushing and ratchet ring, when the inner and outer clutch rings are engaged, the transmission clutch bushing disengages from the ratchet ring. Therefore, even if the inner clutch ring can drive the ratchet ring to rotate, the transmission clutch bushing will not rotate, keeping the central shaft and the connected pedals stationary. When the user pedals, driving the bottom bracket to rotate, the bottom bracket drives the inner torque ring to rotate relative to the outer torque ring. This allows for cadence detection. During the rotation of the inner torque ring, the transmission clutch bushing rotates, driving the ratchet ring to rotate, causing the inner clutch ring to rotate, which in turn rotates the transmission sprocket, thus propelling the bicycle. When the transmission clutch bushing engages with the ratchet ring, the inner and outer clutch rings disengage, and the outer clutch ring stops rotating, thus preventing electromagnetic resistance from the drive motor when the user pedals. In summary, the bottom bracket power output system of this embodiment integrates the clutch, transmission clutch bushing, and ratchet ring onto the bottom bracket, resulting in a compact structure, high integration, and relatively small size.

[0017] The beneficial effects of this utility model's electric bicycle are as follows: due to the central shaft power output system described above, the electric bicycle has a high degree of integration; and because the drive motor directly drives the transmission gear, thereby driving the transmission sprocket to rotate, the transmission efficiency is relatively high.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the central shaft power output system according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 Sectional view along axis AA;

[0021] Figure 3 This is an exploded structural diagram of the central shaft power output system according to an embodiment of the present invention.

[0022] Figure label:

[0023] 100, central shaft; 110, first spline tooth; 120, shaft shoulder;

[0024] 200, Torque generator; 210, Inner torque ring; 211, Second spline tooth; 220, Outer torque ring;

[0025] 300. Clutch; 310. Inner clutch ring; 311. First ratchet tooth; 312. Third spline tooth; 313. Anti-lock ring; 320. Outer clutch ring;

[0026] 400. Transmission gear; 410. Sleeve section;

[0027] 500. Drive clutch bushing; 510. Second ratchet tooth;

[0028] 600, ratchet ring; 700, first bearing; 800, second bearing;

[0029] 900, Third bearing; 1000, Oil seal. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] This utility model discloses a central shaft power output system, referencing... Figures 1-3As shown, the central shaft power output system includes a central shaft 100, a torque converter 200, a clutch 300, a transmission gear 400, a transmission clutch bushing 500, and a ratchet ring 600. The central shaft 100 is used to connect to the foot pedal. The torque converter 200 has an inner torque ring 210 and an outer torque ring 220. The inner torque ring 210 is connected to the central shaft 100, and the outer torque ring 220 is fixedly installed. The clutch 300 includes a clutch inner ring 310 and a clutch outer ring 320. The clutch outer ring 320 is a ratchet ring. The clutch inner ring 310 has a first ratchet 311 that engages with the ratchet ring. The clutch outer ring 320 can... The inner clutch ring 310 is driven to rotate, and is connected to the drive sprocket. The drive gear 400 is connected to the outer clutch ring 320 and is used to drive the drive motor. The drive clutch bushing 500 has a second ratchet 510 that engages with the ratchet ring 600. The ratchet ring 600 is connected to the inner clutch ring 310 and the torque inner ring 210, and can drive the ratchet ring 600 to rotate. The meshing direction of the inner clutch ring 310 and the outer clutch ring 320 is opposite to the meshing direction of the drive clutch bushing 500 and the ratchet ring 600. It can be understood that when the drive motor outputs power, it drives the drive gear 400 to rotate. During the rotation of the drive gear 400, it drives the outer clutch ring 320 to rotate. During the rotation of the outer clutch ring 320, the inner clutch ring 310 also rotates synchronously, thereby causing the drive sprocket to rotate, thus enabling the electric bicycle to move. Since the meshing direction of the inner clutch ring 310 and the outer clutch ring 320 is opposite to the meshing direction of the transmission clutch bushing 500 and the ratchet ring 600, when the inner clutch ring 310 and the outer clutch ring 320 are engaged, the transmission clutch bushing 500 and the ratchet ring 600 are disengaged. Therefore, even if the inner clutch ring 310 can drive the ratchet ring 600 to rotate, the transmission clutch bushing 500 will not rotate at this time, so that the central shaft 100 and the foot pedal connected to it remain stationary. When the user pedals, driving the central shaft 100 to rotate, the central shaft 100 drives the inner torque ring 210 to rotate relative to the outer torque ring 220. This allows for cadence detection. During the rotation of the inner torque ring 210, the transmission clutch bushing 500 rotates, driving the ratchet ring 600 to rotate, causing the clutch inner ring 310 to rotate, which in turn causes the transmission sprocket to rotate, thus propelling the bicycle. When the transmission clutch bushing 500 engages with the ratchet ring 600, the clutch inner ring 310 and the clutch outer ring 320 disengage, and the clutch outer ring 320 does not rotate, thus avoiding electromagnetic resistance from the drive motor when the user pedals. In summary, the central shaft power output system of this embodiment integrates the clutch 300, transmission clutch bushing 500, and ratchet ring 600 onto the central shaft 100, resulting in a compact structure, high integration, and relatively small size.

[0034] refer to Figure 3As shown, the central shaft 100 has a first spline tooth 110, and the inner torque ring 210 has a first spline groove, with the first spline tooth 110 engaging with the first spline groove. It can be understood that the engagement of the first spline tooth 110 and the first spline groove achieves the connection between the inner torque ring 210 and the central shaft 100, simplifying the connection structure, improving connection strength, and effectively preventing relative rotation between the central shaft 100 and the inner torque ring 210. Of course, in other embodiments of this invention, the central shaft 100 and the inner torque ring 210 can also be connected using a flat key or fastening screws, and are not limited to the above description.

[0035] refer to Figure 3 As shown, the inner torque ring 210 is provided with a second spline tooth 211, and the transmission clutch bushing 500 is provided with a second spline groove, which engages with the second spline tooth 211. It can be understood that the connection between the inner torque ring 210 and the transmission clutch bushing 500 is achieved through the engagement of the second spline tooth 211 and the second spline groove, which simplifies the connection structure, improves the connection strength, and effectively prevents relative rotation between the transmission clutch bushing 500 and the inner torque ring 210. Of course, in other embodiments of this utility model, the transmission clutch bushing 500 and the inner torque ring 210 can also be connected using a flat key or fastening screw, and are not limited to the above description.

[0036] refer to Figure 3 As shown, the clutch inner ring 310 is provided with a first internal thread, and the ratchet ring 600 is provided with a first external thread. The clutch inner ring 310 and the ratchet ring 600 are threadedly connected. It can be understood that the threaded connection between the clutch inner ring 310 and the ratchet ring 600 simplifies the connection structure, improves the connection strength, and ensures the concentricity between the ratchet ring 600 and the transmission clutch bushing 500, achieving precise meshing between the second ratchet 510 and the ratchet ring 600. Of course, in other embodiments of this utility model, the clutch inner ring 310 and the ratchet ring 600 can be connected using a flat key or fastening screw, etc., and are not limited to the above description.

[0037] refer to Figure 3 As shown, the clutch outer ring 320 is provided with a second external thread, and the transmission gear 400 is provided with a second internal thread, and the clutch outer ring 320 and the transmission gear 400 are threadedly connected. It can be understood that the threaded connection between the clutch outer ring 320 and the transmission gear 400 simplifies the connection structure, improves the connection strength, and also ensures the concentricity between the clutch outer ring 320 and the transmission gear 400. Of course, in other embodiments of this utility model, the clutch outer ring 320 and the transmission gear 400 can be connected using a flat key or fastening screw, etc., and are not limited to the above description.

[0038] refer to Figure 3As shown, the clutch inner ring 310 has a third spline tooth 312, and the transmission sprocket has a third spline groove, with the third spline tooth 312 engaging with the third spline groove. It can be understood that the engagement of the third spline tooth 312 and the third spline groove achieves the connection between the clutch inner ring 310 and the transmission sprocket, simplifying the connection structure, improving connection strength, and effectively preventing relative rotation between the transmission sprocket and the clutch inner ring 310. Of course, in other embodiments of this utility model, the transmission sprocket and the clutch inner ring 310 can also be connected using a flat key or fastening screw, and are not limited to the above description.

[0039] refer to Figures 2-3 As shown, the central shaft power output system also includes a first bearing 700 and a second bearing 800. Both the first bearing 700 and the second bearing 800 are sleeved on the central shaft 100 and arranged axially spaced along the central shaft 100. The torque converter 200, the transmission clutch bushing 500, and the ratchet ring 600 are located between the two first bearings 700 and the second bearing 800. It can be understood that the first bearings 700 and the second bearings 800 can stably support the central shaft 100, ensuring stable rotation of the central shaft 100 when the user pedals. In embodiments of this utility model, the first bearing 700 and the second bearing 800 can be selected according to actual needs; therefore, the types of the first bearing 700 and the second bearing 800 are not limited here.

[0040] refer to Figure 2 As shown, a shoulder 120 is provided on the central shaft 100. The first bearing 700 abuts against one side of the shoulder 120, and the torque inner ring 210 abuts against the other side of the shoulder 120. One end of the second bearing 800 abuts against the transmission clutch bushing 500, and the other end abuts against the stop protrusion 313 of the clutch inner ring 310. It can be understood that the shoulder 120 can limit the first bearing 700 and the torque inner ring 210, preventing the first bearing 700 and the torque inner ring 210 from moving relative to the central shaft 100, thereby ensuring the working reliability of the central shaft power output system.

[0041] refer to Figure 2 As shown, an oil seal 1000 is also provided inside the clutch inner ring 310 and sleeved on the central shaft 100. The oil seal 1000 is located on the side of the second bearing 800 opposite to the first bearing 700. It can be understood that the oil seal 1000 can effectively protect the transmission gear 400, torque converter 200, clutch 300, etc., to prevent external impurities and moisture from entering, and at the same time prevent internal lubricating oil from overflowing.

[0042] refer to Figure 2As shown, the transmission gear 400 has a sleeve portion 410, and a third bearing 900 is provided between the sleeve portion 410 and the clutch inner ring 310. It is understood that the third bearing 900 between the transmission gear 400 and the clutch inner ring 310 can better support the transmission gear 400, reduce friction between the transmission gear 400 and the clutch inner ring 310, and extend the service life of the transmission gear 400. Optionally, the third bearing 900 is a needle roller bearing. In embodiments of this utility model, the third bearing 900 can also be selected according to actual needs and is not limited to a needle roller bearing.

[0043] This utility model also discloses an electric bicycle, including the aforementioned central shaft power output system and drive motor. Due to the aforementioned central shaft power output system, this electric bicycle has a high degree of integration, and because the drive motor directly drives the transmission gear 400, thereby driving the transmission sprocket to rotate, the transmission efficiency is high.

[0044] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A central shaft power take-off system, characterized in that, include: A central shaft (100) for connection to a foot pedal; A torque device (200) having an inner torque ring (210) and an outer torque ring (220), wherein the inner torque ring (210) is connected to the central shaft (100) and the outer torque ring (220) is fixedly disposed; The clutch (300) includes an inner clutch ring (310) and an outer clutch ring (320). The outer clutch ring (320) is a ratchet ring. The inner clutch ring (310) is provided with a first ratchet (311) that engages with the ratchet ring. The outer clutch ring (320) can drive the inner clutch ring (310) to rotate. The inner clutch ring (310) is used to connect with a transmission sprocket. A transmission gear (400) is connected to the clutch outer ring (320), and the transmission gear (400) is used to drive the drive motor. The transmission clutch bushing (500) and ratchet ring (600) are provided. The transmission clutch bushing (500) has a second ratchet tooth (510) that engages with the ratchet ring (600). The ratchet ring (600) is connected to the clutch inner ring (310). The transmission clutch bushing (500) is connected to the torque inner ring (210) and is capable of driving the ratchet ring (600) to rotate. The meshing direction of the inner clutch ring (310) and the outer clutch ring (320) is opposite to the meshing direction of the transmission clutch bushing (500) and the ratchet ring (600).

2. The central shaft power output system according to claim 1, characterized in that, The central shaft (100) is provided with a first spline tooth (110), and the torque inner ring (210) is provided with a first spline groove, wherein the first spline tooth (110) and the first spline groove are engaged.

3. The central shaft power output system according to claim 1, characterized in that, The inner torque ring (210) is provided with a second spline tooth (211), and the transmission clutch bushing (500) is provided with a second spline groove, which cooperates with the second spline tooth (211).

4. The central shaft power output system according to claim 1, characterized in that, The clutch inner ring (310) is provided with a first internal thread, and the ratchet ring (600) is provided with a first external thread. The clutch inner ring (310) and the ratchet ring (600) are threadedly connected. The transmission gear (400) has a second external thread, the clutch outer ring (320) has a second internal thread, and the transmission gear (400) and the clutch outer ring (320) are threadedly connected.

5. The central shaft power output system according to claim 1, characterized in that, The clutch inner ring (310) is provided with a third spline tooth (312), and the transmission sprocket is provided with a third spline groove. The third spline tooth (312) and the third spline groove are engaged.

6. The central shaft power take-off system according to any one of claims 1-5, characterized in that, It also includes a first bearing (700) and a second bearing (800), both of which are sleeved on the central shaft (100) and arranged at intervals along the axial direction of the central shaft (100). The torque device (200), the transmission clutch bushing (500), and the ratchet ring (600) are located between the two first bearings (700) and the second bearings (800).

7. The central shaft power output system according to claim 6, characterized in that, A shoulder (120) is provided on the central shaft (100). The first bearing (700) abuts against one side of the shoulder (120), and the torque inner ring (210) abuts against the other side of the shoulder (120). One end of the second bearing (800) abuts against the transmission clutch bushing (500), and the other end abuts against the stop protrusion (313) of the clutch inner ring (310).

8. The central shaft power output system according to claim 7, characterized in that, The clutch inner ring (310) is also provided with an oil seal (1000) sleeved on the central shaft (100), and the oil seal (1000) is located on the side of the second bearing (800) away from the first bearing (700).

9. The central shaft power take-off system according to any one of claims 1-5, characterized in that, The transmission gear (400) has a sleeve portion (410), and a third bearing (900) is provided between the sleeve portion (410) and the clutch inner ring (310).

10. A power-assisted bicycle, characterized in that, It includes the central shaft power output system and drive motor as described in any one of claims 1-9.

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