Continuously variable transmission device and electric bicycle

Abstract

A continuously variable transmission device and an electric bicycle. The continuously variable transmission device comprises a first electric motor, a second electric motor, a first planetary gearset, a second planetary gearset, an idle gear assembly, a pedal assembly and a crankset assembly, wherein the first planetary gearset and the second planetary gearset share the same ring gear, and the ring gear is provided with ring-gear inner teeth and ring-gear outer teeth; the idle gear assembly comprises an idle gear and an idle gear shaft, and the idle gear is sleeved on the idle gear shaft by means of a bearing; a first planetary gear meshes with both a first sun gear and the ring-gear inner teeth; the pedal assembly comprises a pedal, a pedal shaft and a pedal gear; a second planetary gear meshes with a second sun gear and the ring-gear inner teeth, the ring-gear outer teeth mesh with the idle gear, and the idle gear meshes with the pedal gear; a first electric motor shaft of the first electric motor sequentially runs through a first overrun clutch and the first sun gear; a second electric motor shaft of the second electric motor sequentially runs through a second overrun clutch and a third overrun clutch; and the pedal gear is sleeved on the pedal shaft by means of a fourth overrun clutch.

Description

Continuously variable transmission and electric bicycle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202311123291.9 filed with the Chinese Patent Office on August 31, 2023, entitled “Continuously Variable Transmission Device and Electric Bicycle,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the technical field of electric bicycles, and in particular to a continuously variable transmission device and an electric bicycle. Background Art

[0004] Existing continuously variable transmission devices for electric bicycles generally have the following problems:

[0005] 1. When only the middle shaft is used as the drive input, the middle shaft drives the sun gear, planetary gears, planetary carrier, and output chainring assembly to rotate in sequence. During this process, because the ring gear is not fixed, the planetary gears also drive the ring gear to rotate, which in turn drives the first motor to rotate. Ultimately, the planetary carrier is not driven, and instead drives the first motor to rotate in the opposite direction.

[0006] 2. When only the first motor is used as the drive input, the first motor drives the ring gear, planetary gears, planetary carrier, and output chainring assembly to rotate in sequence. During this process, because the sun gear is not fixed, the planetary gears also drive the sun gear to rotate, which in turn drives the central shaft to rotate, ultimately causing the pedal assembly installed on the central shaft to rotate, which can easily cause the pedal to injure people;

[0007] 3. When the middle shaft and the first motor are used as drive inputs at the same time, since the driving forces of the middle shaft and the first motor are in opposite directions, the middle shaft needs to input a large driving force to overcome the driving force of the first motor before it can drive the sun gear to rotate, and then drive the planetary gears, planetary brackets, and output sprocket assembly to rotate. This process is extremely laborious.

[0008] Summary of the Invention

[0009] The present disclosure provides a continuously variable transmission device, comprising:

[0010] a first motor, a second motor, a first planetary gear mechanism, a second planetary gear mechanism, a pedal assembly, and a crankset assembly;

[0011] The first planetary gear mechanism includes a first sun gear, a first planetary gear, a first planetary gear shaft, and a first planetary carrier; the second planetary gear mechanism includes a second sun gear, a second planetary gear, a second planetary gear shaft, and a second planetary carrier; the first planetary gear mechanism and the second planetary gear mechanism share the same ring gear, which is provided with internal gear teeth and external gear teeth;

[0012] The first planetary gear is arranged in a frame structure composed of the first planetary carrier and the first planetary gear shaft, and one side of the first planetary carrier is fixedly connected to the chainring assembly; the second planetary gear is arranged in a frame structure composed of the second planetary carrier and the second planetary gear shaft;

[0013] The first planetary gears are respectively meshed with the first sun gear and the inner teeth of the ring gear; the second planetary gears are respectively meshed with the second sun gear and the inner teeth of the ring gear;

[0014] The first motor is provided with a first motor shaft, and the first motor shaft is sequentially passed through a first overrunning clutch and the first sun gear;

[0015] The second motor is provided with a second motor shaft, and the second motor shaft passes through the second overrunning clutch on the second planetary support and the third overrunning clutch on the second sun gear in sequence.

[0016] In one or more embodiments, the first planet gears are uniformly distributed circumferentially in a frame structure consisting of the first planet carrier and the first planet gear shaft.

[0017] In one or more embodiments, the second planet gears are uniformly distributed circumferentially in a frame structure consisting of the second planet carrier and the second planet gear shaft.

[0018] In one or more embodiments, the continuously variable transmission device further includes an idler assembly, which includes an idler and an idler shaft, the idler is mounted on the idler shaft through a bearing, the outer teeth of the ring gear are engaged with the idler, and the idler is engaged with the pedal gear.

[0019] In one or more embodiments, the pedal assembly includes a pedal, a pedal shaft and a pedal gear, the pedal gear is sleeved on the pedal shaft through a fourth overrunning clutch, and the pedal is eccentrically connected to the pedal shaft for rotation.

[0020] In one or more embodiments, the continuously variable transmission device further includes a housing, a first end cover, and a second end cover; the first end cover and the second end cover are disposed on opposite sides of the housing, and the housing, the first end cover, and the second end cover together enclose a sealed accommodating cavity;

[0021] The gear ring is sleeved on the second end cover via a bearing;

[0022] The second planetary support is fixed between the first end cover and the second end cover;

[0023] The first motor shaft is supported and fixed by the first overrunning clutch on the first end cover and the bearing on the second end cover side;

[0024] The idler shaft is fixed between the second planetary carrier and the second end cover via a bearing support;

[0025] The pedal shaft is supported and fixed between the first end cover and the second end cover through a bearing.

[0026] In one or more embodiments, the continuously variable transmission device further includes a housing, a first end cover, and a second end cover; the first end cover and the second end cover are relatively arranged on both sides of the housing, and the housing, the first end cover, and the second end cover together enclose a closed accommodating cavity.

[0027] In one or more embodiments, the ring gear is mounted on the second end cover via a bearing.

[0028] In one or more embodiments, the second planet carrier is fixed between the first end cover and the second end cover.

[0029] In one or more embodiments, the first motor shaft is fixed by a first overrunning clutch on the first end cover and a bearing supported on the second end cover.

[0030] In one or more embodiments, the idler shaft is fixed between the second planet carrier and the second end cover via bearing support.

[0031] In one or more embodiments, the pedal shaft is fixed between the first end cover and the second end cover via bearing support.

[0032] In one or more implementations, the continuously variable transmission device further includes a motor control module, wherein the motor control module is connected to the first motor and the second motor respectively.

[0033] In one or more embodiments, the continuously variable transmission device further includes a speed sensor assembly, wherein the speed sensor assembly is sleeved on the pedal shaft and the speed sensor assembly is electrically connected to the motor control module.

[0034] In one or more embodiments, the pedal shaft is arranged in parallel with the first motor shaft.

[0035] In one or more embodiments, the pedal is connected to the pedal shaft via a crank assembly.

[0036] In one or more embodiments, the first motor shaft and the second motor shaft are arranged along the same axis direction.

[0037] In one or more implementation schemes, the first motor shaft is disposed through the second motor shaft.

[0038] In one or more implementations, the first planetary gear mechanism is coaxially arranged with the first motor shaft, and the second planetary gear mechanism is coaxially arranged with the second motor shaft.

[0039] The present disclosure further provides an electric bicycle comprising the continuously variable transmission device according to any one of the aforementioned embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0041] FIG1 is a schematic structural diagram of a continuously variable transmission device for an electric bicycle in the prior art;

[0042] FIG2 is a schematic structural diagram of a continuously variable transmission device according to an embodiment of the present disclosure.

[0043] FIG3 is a schematic structural diagram of a continuously variable transmission device according to an embodiment of the present disclosure.

[0044] Icons: 010-first motor; 011-first motor shaft; 020-second motor; 022-second motor shaft; 110-first sun gear; 120-first planetary gear; 130-first planetary gear shaft; 140-first planetary carrier; 210-second sun gear; 220-second planetary gear; 230-second planetary gear shaft; 240-second planetary carrier; 310-idler gear; 320-idler gear shaft; 410-pedal; 420-pedal shaft; 430-pedal gear; 500-sprocket assembly; 600-ring gear; 710-first overrunning clutch; 720-second overrunning clutch; 730-third overrunning clutch; 740-fourth overrunning clutch; 810-housing; 821-first end cover; 822-second end cover; 910-motor control module; 920-speed sensor assembly. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all of them. Generally, the components of the embodiments of the present disclosure described and shown in the drawings herein can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the present disclosure as claimed, but merely represents selected embodiments of the present disclosure. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present disclosure without creative effort shall fall within the scope of protection of the present disclosure.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0048] In the description of the present disclosure, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the disclosed product is usually placed when in use. It is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present disclosure.

[0049] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0050] It should be noted that, in the absence of conflict, the features in the embodiments of the present disclosure may be combined with each other.

[0051] The continuously variable transmission device and electric bicycle provided by the present disclosure can improve the technical problems existing in the continuously variable transmission device of the existing electric bicycle, making the power easier, more stable and smoother when riding.

[0052] FIG1 shows a schematic structural diagram of a continuously variable transmission device for an electric bicycle in the prior art.

[0053] Referring to Figure 1, the continuously variable transmission device for an electric bicycle comprises a first motor 12, a second motor 15, a central shaft 9, and a first planetary gear mechanism 1 arranged coaxially with the central shaft. The planetary gear mechanism comprises a sun gear 8, a ring gear 4, a first planetary carrier 11A, and first planetary gears 11B. Sun gear 8 is mounted on the central shaft via a clutch. Ring gear 4 is provided with internal teeth 4A and external teeth 4B. Planetary gears 11B are evenly distributed circumferentially around carrier 11A and mesh with the sun gear and internal teeth of the ring gear, respectively. The first motor meshes with the external teeth of the ring gear via gears. The planetary carrier meshes with the second motor via gears on one axial side and has an output chainring assembly 13 fixedly connected to it on the other axial side. During operation, different combinations of the first motor, second motor, and central shaft drive modes can be used to achieve different sport mode switching and continuously variable transmission functions. However, each drive mode presents its own challenges.

[0054] The present disclosure provides a continuously variable transmission device for an electric bicycle, which solves the problem that, due to the ring gear not being fixed, the planetary gears will drive the ring gear to rotate, and then drive the first motor to rotate, ultimately resulting in the planetary carrier not being driven and instead causing the first motor to rotate in the opposite direction; solves the problem that, due to the sun gear not being fixed, the planetary gears will drive the sun gear to rotate, and then drive the middle shaft to rotate, ultimately causing the pedal assembly mounted on the middle shaft to rotate, which may easily cause the pedal to injure people; solves the problem that when the middle shaft and the first motor are simultaneously used as drive inputs, because the driving forces of the middle shaft and the first motor are in opposite directions, the middle shaft needs to input a large driving force, first overcoming the driving force of the first motor before it can drive the sun gear to rotate, and then drive the planetary gears, planetary carrier, and output chainring assembly to rotate, which is an extremely laborious process. Accordingly, a continuously variable transmission device and an electric bicycle are provided in the following embodiments.

[0055] FIG2 is a schematic structural diagram of a continuously variable transmission device according to an embodiment of the present disclosure; FIG3 is a schematic structural diagram of a continuously variable transmission device according to an embodiment of the present disclosure.

[0056] Please refer to FIG. 2 . This embodiment provides a continuously variable transmission device, including a first motor 010 , a second motor 020 , a first planetary gear mechanism, a second planetary gear mechanism, an idler assembly, a pedal assembly, and a chainring assembly 500 .

[0057] The first planetary gear mechanism includes a first sun gear 110, first planetary gears 120, a first planetary gear shaft 130, and a first planetary carrier 140; the second planetary gear mechanism includes a second sun gear 210, second planetary gears 220, a second planetary gear shaft 230, and a second planetary carrier 240. The first and second planetary gear mechanisms share the same ring gear 600, which has internal and external teeth.

[0058] The first planetary gear 120 is arranged in a frame structure composed of a first planetary carrier 140 and a first planetary gear shaft 130. One side of the first planetary carrier 140 is fixedly connected to the crankset assembly 500. The second planetary gear 220 is arranged in a frame structure composed of a second planetary carrier 240 and a second planetary gear shaft 230.

[0059] The first planetary gears 120 are respectively meshed with the first sun gear 110 and the inner teeth of the ring gear; the second planetary gears 220 are respectively meshed with the second sun gear 210 and the inner teeth of the ring gear;

[0060] The first motor 010 is provided with a first motor shaft 011 , and the first motor shaft 011 sequentially passes through the first overrunning clutch 710 and the first sun gear 110 ;

[0061] The second motor 020 is provided with a second motor shaft 022 , and the second motor shaft 022 sequentially passes through the second overrunning clutch 720 on the second planetary carrier 240 and the third overrunning clutch 730 on the second sun gear 210 .

[0062] In one or more embodiments, the idler assembly includes an idler 310 and an idler shaft 320 . The idler 310 is sleeved on the idler shaft 320 through a bearing. The outer teeth of the gear ring mesh with the idler 310 , and the idler 310 meshes with the pedal gear 430 .

[0063] In one or more embodiments, the pedal assembly includes a pedal 410 , a pedal shaft 420 , and a pedal gear 430 . The pedal gear 430 is sleeved on the pedal shaft 420 via a fourth overrunning clutch 740 . The pedal 410 is eccentrically rotatably connected to the pedal shaft 420 .

[0064] In one or more embodiments, the first planet gears 120 are evenly distributed circumferentially in a frame structure composed of the first planet carrier 140 and the first planet gear shaft 130. In one or more embodiments, the second planet gears 220 are evenly distributed circumferentially in a frame structure composed of the second planet carrier 240 and the second planet gear shaft 230.

[0065] In one or more embodiments, the first motor shaft 011 is coupled to the inner ring or the outer ring of the first overrunning clutch 710 and coupled to the first sun gear 110 .

[0066] In one or more embodiments, the second motor shaft 022 is coupled to an inner ring or outer ring of a second overrunning clutch 720 disposed on the second planetary carrier 240 and to an inner ring or outer ring of a third overrunning clutch 730 disposed on the second sun gear 210 .

[0067] In one or more embodiments, the continuously variable transmission device further includes a housing 810, a first end cap 821, and a second end cap 822; the first end cap 821 and the second end cap 822 are relatively arranged on both sides of the housing 810, and the housing 810, the first end cap 821, and the second end cap 822 together enclose a sealed accommodating cavity. In one or more embodiments, the housing 810 is a cylindrical structure, and the first end cap 821 and the second end cap 822 are respectively arranged on the opening in the thickness direction of the housing 810 to form a sealed accommodating cavity. This design disclosed herein not only ensures the safety and stability of the continuously variable transmission device during the speed change process, but also ensures that its various components can be firmly supported.

[0068] The continuously variable transmission device of this embodiment can also be the continuously variable transmission device shown in FIG3 , whose structure is substantially the same as that of the continuously variable transmission device shown in FIG2 , except that the continuously variable transmission device in FIG3 does not have an idler assembly, and its pedal assembly is directly connected to the first planetary gear mechanism. That is, the continuously variable transmission device of this embodiment may include a first motor 010, a second motor 020, a first planetary gear mechanism, a second planetary gear mechanism, a pedal assembly, and a chainring assembly 500; the first planetary gear mechanism includes a first sun gear 110, a first planetary gear 120, a first planetary gear shaft 130, and a first planetary carrier 140; the second planetary gear mechanism includes a second sun gear 210, a second planetary gear 220, a second planetary gear shaft 230, and a second planetary carrier 240; the first planetary gear mechanism and the second planetary gear mechanism share the same ring gear 600, which is provided with inner ring gear teeth and outer ring gear teeth; the first planetary gear 120 is arranged in a frame structure composed of the first planetary carrier 140 and the first planetary gear shaft 130 In the structure, one side of the first planetary carrier 140 is fixedly connected to the chainring assembly 500; the second planetary gear 220 is arranged in a frame structure composed of the second planetary carrier 240 and the second planetary gear shaft 230; the first planetary gear 120 is respectively engaged with the first sun gear 110 and the inner teeth of the ring gear; the second planetary gear 220 is respectively engaged with the second sun gear 210 and the inner teeth of the ring gear; the first motor 010 is provided with a first motor shaft 011, and the first motor shaft 011 is sequentially passed through the first overrunning clutch 710 and the first sun gear 110; the second motor 020 is provided with a second motor shaft 022, and the second motor shaft 022 is sequentially passed through the second overrunning clutch 720 on the second planetary carrier 240 and the third overrunning clutch 730 on the second sun gear 210.

[0069] As can be seen from Figures 2-3, the continuously variable transmission device mainly includes a first motor 010, a first motor shaft 011 and a first planetary gear mechanism arranged coaxially with the first motor shaft 011, a second motor 020, a second motor shaft 022 and a second planetary gear mechanism arranged coaxially with the second motor shaft 022, an idler assembly, a pedal assembly, a chainring assembly 500, a first end cover 821, a second end cover 822, a first overrunning clutch 710, a second overrunning clutch 720, a third overrunning clutch 730, a fourth overrunning clutch 740, as well as a speed sensor assembly 920 and a motor control module 910.

[0070] In one or more embodiments, the first planetary gear mechanism primarily includes a first sun gear 110, first planetary gears 120, a first planetary gear shaft 130, a first planetary carrier 140, and a ring gear 600; the second planetary gear mechanism primarily includes a second sun gear 210, second planetary gears 220, a second planetary gear shaft 230, a second planetary carrier 240, and a ring gear 600. The first and second planetary gear mechanisms share the same ring gear 600, which is provided with internal and external teeth. The ring gear 600 is mounted on the second end cover 822 via a bearing sleeve.

[0071] In one or more embodiments, the first planetary gears 120 are evenly distributed circumferentially within a frame structure comprised of a first planetary carrier 140 and a first planetary gear shaft 130. A chainring assembly 500 is fixedly connected to one side of the first planetary carrier 140, and the chainring assembly 500 is connected to a rear wheel drive chain. The second planetary gears 220 are evenly distributed circumferentially within a frame structure comprised of a second planetary carrier 240 and a second planetary gear shaft 230. The second planetary carrier 240 is fixed between a first end cap 821 and a second end cap 822. The first planetary gears 120 mesh with the first sun gear 110 and the inner teeth of the ring gear, respectively. The second planetary gears 220 mesh with the second sun gear 210 and the inner teeth of the ring gear, respectively. The outer teeth of the ring gear mesh with the idler gear 310, and the idler gear 310 meshes with the pedal gear 430.

[0072] In one or more embodiments, the first motor shaft 011 is provided with the first motor 010, the first sun gear 110, and the first overrunning clutch 710. The first motor shaft 011 is supported and fixed by the first overrunning clutch 710 on the first end cover 821 and the bearings on the second end cover 822.

[0073] The second motor shaft 022 is sleeved with the second motor 020 , the second overrunning clutch 720 , and the third overrunning clutch 730 . The second motor shaft 022 is supported and fixed by the second overrunning clutch 720 on the second planetary bracket 240 and the third overrunning clutch 730 on the second sun gear 210 .

[0074] In one or more embodiments, the idler assembly mainly includes an idler 310 and an idler shaft 320. The idler 310 is sleeved on the idler shaft 320 via a bearing. The idler shaft 320 is fixed between the second planetary carrier 240 and the second end cover 822 via a bearing support. The pedal assembly mainly includes a pedal 410, a pedal shaft 420, a pedal gear 430, and a fourth overrunning clutch 740. The pedal gear 430 is sleeved on the pedal shaft 420 via the fourth overrunning clutch 740. The pedal shaft 420 is fixed between the first end cover 821 and the second end cover 822 via a bearing support.

[0075] In one or more embodiments, the pedal assembly is directly connected to the first planetary gear mechanism. The pedal assembly mainly includes a pedal 410, a pedal shaft 420, a pedal gear 430, and a fourth overrunning clutch 740. The pedal gear 430 is mounted on the pedal shaft 420 via the fourth overrunning clutch 740. The pedal shaft 420 is fixed between the first end cap 821 and the second end cap 822 via a bearing.

[0076] In one or more embodiments, the continuously variable transmission device further includes a motor control module 910 and a speed sensor assembly 920; the motor control module 910 is connected to the first motor 010 and the second motor 020, respectively. The speed sensor assembly 920 is mounted on the pedal shaft 420 and is electrically connected to the motor control module 910. This ensures that the first motor 010 and the second motor 020 can be precisely controlled to coordinate the speed of the pedal shaft 420.

[0077] In one or more embodiments, a speed sensor assembly 920 is mounted on the pedal shaft 420 to monitor the speed of the pedal shaft 420 and transmit this data to the motor control module 910 to determine whether each motor is providing power. In actual operation, different combinations of the first motor 010, the second motor 020, and the pedal 410 can be used to achieve different sports mode switching and continuously variable speed functions.

[0078] In one or more embodiments, the first motor shaft 011 and the second motor shaft 022 are arranged along the same axis. Such an arrangement can further simplify the space occupied by the first planetary gear mechanism and the second planetary gear mechanism, thereby improving the efficiency of the speed change.

[0079] In one or more embodiments, the first motor shaft 011 is disposed in the second motor shaft 022. This can improve the integration of the device while ensuring the speed change efficiency.

[0080] In one or more embodiments, the pedal shaft 420 is arranged parallel to the first motor shaft 011. That is, the pedal shaft 420 is parallel to both the first motor shaft 011 and the second motor shaft 022. This arrangement ensures smoother and more reliable power transmission through the gears while also avoiding the inconvenience of manufacturing caused by irregularly shaped structures.

[0081] In one or more embodiments, the pedal 410 is connected to the pedal shaft 420 via a crank assembly. The crank assembly can ensure that the power from the pedal 410 can be transmitted to the pedal shaft 420 in a timely and efficient manner.

[0082] When in use, the continuously variable transmission device of the present disclosure has at least the following motion modes to achieve transmission and speed change:

[0083] Motion Mode 1: Only the pedal 410 serves as the driving input. The pedal 410 sequentially drives the pedal gear 430, the idler gear 310, the ring gear 600, the first planetary gear 120, the first planetary carrier 140, and the chainring assembly 500 to rotate via the fourth overrunning clutch 740. During this process, the first sun gear 110 remains stationary under the action of the first overrunning clutch 710, causing the first motor 010 to also remain stationary. The second sun gear 210, under the action of the third overrunning clutch 730, only rotates on its own and does not drive the second motor 020 to rotate.

[0084] Movement mode two: When only the first motor 010 is used as the driving input, the first motor 010 drives the first sun gear 110, the first planetary gear 120, the first planetary carrier 140, and the chainring assembly 500 to rotate in sequence; during this process, the ring gear 600 remains stationary under the joint action of the second overrunning clutch 720 and the third overrunning clutch 730, so that the second motor 020 also remains stationary; the pedal gear 430 remains stationary under the action of the fourth overrunning clutch 740, so that the pedal shaft 420 and the pedal 410 also remain stationary.

[0085] Movement mode three: When only the second motor 020 is used as the driving input, the second motor 020 drives the second sun gear 210, the second planetary gear 220, the ring gear 600, the first planetary gear 120, the first planetary carrier 140, and the chainring assembly 500 to rotate in sequence through the third overrunning clutch 730. During this process, the first sun gear 110 remains stationary under the action of the first overrunning clutch 710, causing the first motor 010 to also remain stationary. The pedal shaft 420 does not rotate under the action of the fourth overrunning clutch 740, that is, the pedal shaft 420 and the pedal 410 remain stationary under the action of the fourth overrunning clutch 740.

[0086] Motion Mode 4: When the first motor 010 and the second motor 020 are simultaneously used as drive inputs, the first motor 010 sequentially drives the first sun gear 110, the first planetary gear 120, the first planetary carrier 140, and the chainring assembly 500 to rotate. The second motor 020 sequentially drives the second sun gear 210, the second planetary gear 220, the ring gear 600, the first planetary gear 120, the first planetary carrier 140, and the chainring assembly 500 to rotate via the third overrunning clutch 730. The two motors drive the chainring assembly 500 to rotate in the same direction. The pedal shaft 420 does not rotate under the action of the fourth overrunning clutch 740, that is, it remains stationary under the action of the fourth overrunning clutch 740, so that the pedal shaft 420 and the pedal 410 also remain stationary.

[0087] Movement mode five: When the second motor 020 and the pedal 410 are used as drive inputs at the same time, the second motor 020 drives the second sun gear 210, the second planetary gear 220, the ring gear 600, the first planetary gear 120, the first planetary carrier 140, and the chainring assembly 500 to rotate in sequence through the third overrunning clutch 730, and the pedal 410 drives the pedal gear 430, the idler gear 310, the ring gear 600, the first planetary gear 120, the first planetary carrier 140, and the chainring assembly 500 to rotate in sequence through the fourth overrunning clutch 740, and the second motor 020 and the pedal 410 drive the chainring assembly 500 to rotate in the same direction. During this process, the first sun gear 110 remains stationary under the action of the first overrunning clutch 710, so that the first motor 010 also remains stationary; according to the speed value and acceleration value of the pedal shaft 420 monitored by the speed sensor assembly 920, the motor control module 910 automatically adjusts the speed and driving force of the second motor 020, which can effectively adjust the driving load of the pedal 410, so that the rider can neither feel the air nor the resistance when riding, and can obtain a better riding experience;

[0088] Motion mode six: When the first motor 010, the second motor 020 and the pedal 410 are used as drive inputs at the same time, the first motor 010 drives the first sun gear 110, the first planetary gear 120, the first planetary carrier 140, and the chainring assembly 500 to rotate in sequence. The second motor 020 drives the second sun gear 210, the second planetary gear 220, the ring gear 600, the first planetary gear 120, the first planetary carrier 140, and the chainring assembly 500 to rotate in sequence through the third overrunning clutch 730. The pedal 410 drives the pedal gear 430, the idler gear 310, the ring gear 600, the first planetary gear 120, the first planetary carrier 140, and the chainring assembly 500 to rotate in sequence through the fourth overrunning clutch 740. The first motor 010, the second motor 020 and the pedal 410 drive the chainring assembly 500 to rotate in the same direction. During this process, the force exerted by the first motor 010 on the ring gear 600 is overcome by the second motor 020, thereby preventing the force exerted by the first motor 010 on the ring gear 600 from being transmitted to the pedal 410; according to the speed value and acceleration value of the pedal shaft 420 monitored by the speed sensor assembly 920, the motor control module 910 automatically adjusts the speed and driving force of the first motor 010 and the second motor 020, which can effectively adjust the load size on the pedal 410, so that people have neither a sense of stepping on air nor a sense of resistance when riding, and can obtain a better riding experience.

[0089] The present disclosure also provides an electric bicycle comprising the continuously variable transmission device of any of the aforementioned embodiments. Such an electric bicycle includes the aforementioned continuously variable transmission device and thus has all the benefits of a continuously variable transmission device. Specifically, such an electric bicycle provides smooth and effortless riding, with smooth and effortless shifting.

[0090] In summary, the embodiments of the present disclosure provide a continuously variable transmission device and an electric bicycle, which have at least the following advantages:

[0091] 1. Through different combinations of the first motor 010, the second motor 020, and the pedal 410, different sports mode switching and stepless speed change functions can be achieved;

[0092] 2. When any one of the first motor 010, the second motor 020, and the pedal 410 is used as the driving input, the other two can remain stationary and are not affected by the driving end;

[0093] 3. When the second motor 020 and the pedal 410 are simultaneously used as driving inputs, the motor control module 910 automatically adjusts the speed and driving force of the second motor 020 according to the speed value and acceleration value of the pedal shaft 420 monitored by the speed sensor assembly 920, so that the user has neither a sense of stepping on air nor a sense of resistance when riding, and can obtain a better riding experience;

[0094] 4. When the first motor 010, the second motor 020 and the pedal 410 are used as driving inputs at the same time, the force exerted by the first motor 010 on the ring gear 600 is overcome by the second motor 020, thereby preventing the force exerted by the first motor 010 on the ring gear 600 from being transmitted to the pedal 410. According to the speed value and acceleration value of the pedal shaft 420 monitored by the speed sensor assembly 920, the motor control module 910 automatically adjusts the speed and driving force of the first motor 010 and the second motor 020, which can effectively adjust the load size on the pedal 410, so that people have neither a sense of stepping on air nor a sense of resistance when riding, and can obtain a better riding experience.

[0095] The above are only specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims. Industrial Applicability

[0096] The continuously variable transmission device disclosed in the present invention can realize different motion mode switching and continuously variable speed function through different combinations of three driving modes: the first motor, the second motor, and the pedal; when any one of the first motor, the second motor, and the pedal is used as the driving input, the other two can remain stationary and are not affected by the driving end; when the second motor and the pedal are used as the driving input at the same time, the motor control module automatically adjusts the speed and driving force of the second motor according to the speed value and acceleration value of the pedal shaft monitored by the speed sensor component, which can effectively adjust the driving load size of the pedal. When riding, people have neither a feeling of stepping on air nor a sense of resistance, and can obtain a better riding experience; when the first motor, the second motor and the pedal are used as driving inputs at the same time, the force exerted by the first motor on the ring gear is overcome by the second motor, thereby avoiding the force exerted by the first motor on the ring gear being transmitted to the pedal. According to the speed value and acceleration value of the pedal shaft monitored by the speed sensor component, the motor control module automatically adjusts the speed and driving force of the first motor and the second motor, which can effectively adjust the load size on the pedal, so that people have neither a feeling of stepping on air nor a sense of resistance when riding, and can obtain a better riding experience.

Claims

1. A continuously variable transmission device, comprising: A first motor (010), a second motor (020), a first planetary gear mechanism, a second planetary gear mechanism, a pedal assembly and a crankset assembly (500); The first planetary gear mechanism comprises a first sun gear (110), a first planetary gear (120), a first planetary gear shaft (130) and a first planetary carrier (140); the second planetary gear mechanism comprises a second sun gear (210), a second planetary gear (220), a second planetary gear shaft (230) and a second planetary carrier (240); the first planetary gear mechanism and the second planetary gear mechanism share the same ring gear (600), and the ring gear (600) is provided with inner ring gear teeth and outer ring gear teeth; The first planetary gear (120) is arranged in a frame structure composed of the first planetary bracket (140) and the first planetary gear shaft (130), and one side of the first planetary bracket (140) is fixedly connected to the crankset assembly (500); the second planetary gear (220) is arranged in a frame structure composed of the second planetary bracket (240) and the second planetary gear shaft (230); The first planetary gear (120) is meshed with the first sun gear (110) and the inner teeth of the gear ring respectively; the second planetary gear (220) is meshed with the second sun gear (210) and the inner teeth of the gear ring respectively; The first motor (010) is provided with a first motor shaft (011), and the first motor shaft (011) is sequentially penetrated by a first overrunning clutch (710) and the first sun gear (110); The second motor (020) is provided with a second motor shaft (022), and the second motor shaft (022) is sequentially passed through a second overrunning clutch (720) on the second planetary support (240) and a third overrunning clutch (730) on the second sun gear (210).

2. The continuously variable transmission device according to claim 1, wherein: The first planetary gears (120) are evenly distributed in the circumferential direction in a frame structure composed of the first planetary support (140) and the first planetary gear shaft (130).

3. The continuously variable transmission device according to claim 1 or 2, wherein: The second planetary gears (220) are evenly distributed in the circumferential direction in a frame structure composed of the second planetary support (240) and the second planetary gear shaft (230).

4. The continuously variable transmission according to any one of claims 1 to 3, further comprising an idler assembly, wherein: The idler wheel assembly comprises an idler wheel (310) and an idler wheel shaft (320); the idler wheel (310) is sleeved on the idler wheel shaft (320) via a bearing; the outer teeth of the gear ring are meshed with the idler wheel (310); and the idler wheel (310) is meshed with the pedal gear (430).

5. The continuously variable transmission device according to claim 4, wherein: The pedal assembly comprises a pedal (410), a pedal shaft (420) and a pedal gear (430); the pedal gear (430) is sleeved on the pedal shaft (420) via a fourth overrunning clutch (740); and the pedal (410) is eccentrically rotatably connected to the pedal shaft (420).

6. The continuously variable transmission device according to claim 5, further comprising a housing (810), a first end cover (821), and a second end cover (822), in, The first end cover (821) and the second end cover (822) are arranged on both sides of the shell (810) in a relative manner, and the shell (810), the first end cover (821) and the second end cover (822) are jointly enclosed to form a closed accommodating cavity; The gear ring (600) is sleeved on the second end cover (822) via a bearing; The second planetary bracket (240) is fixed between the first end cover (821) and the second end cover (822); The first motor shaft (011) is supported and fixed by a first overrunning clutch (710) on the first end cover (821) and a bearing on the side of the second end cover (822); The idler shaft (320) is fixed between the second planetary support (240) and the second end cover (822) through bearing support; The pedal shaft (420) is fixed between the first end cover (821) and the second end cover (822) via a bearing support.

7. The continuously variable transmission device according to claim 5, further comprising a housing (810), a first end cover (821) and a second end cover (822), in, The first end cover (821) and the second end cover (822) are arranged oppositely on two sides of the shell (810), and the shell (810), the first end cover (821) and the second end cover (822) are jointly enclosed to form a closed accommodating cavity.

8. The continuously variable transmission device according to claim 7, wherein: The gear ring (600) is sleeved on the second end cover (822) via a bearing.

9. The continuously variable transmission device according to claim 7 or 8, wherein: The second planetary support (240) is fixed between the first end cover (821) and the second end cover (822).

10. The continuously variable transmission device according to any one of claims 7 to 9, wherein: The first motor shaft (011) is supported and fixed by the first overrunning clutch (710) on the first end cover (821) and the bearing on the side of the second end cover (822).

11. The continuously variable transmission according to any one of claims 7 to 10, wherein: The idler shaft (320) is fixed between the second planetary support (240) and the second end cover (822) via a bearing support.

12. The continuously variable transmission according to any one of claims 7 to 11, wherein: The pedal shaft (420) is fixed between the first end cover (821) and the second end cover (822) via a bearing support.

13. The continuously variable transmission device according to any one of claims 5 to 12, further comprising a motor control module (910), wherein: The motor control module (910) is connected to the first motor (010) and the second motor (020) respectively.

14. The continuously variable transmission device according to claim 13, further comprising a rotation speed sensor assembly (920), wherein: The rotation speed sensor component (920) is sleeved on the pedal shaft (420), and the rotation speed sensor component (920) is electrically connected to the motor control module (910).

15. The continuously variable transmission according to any one of claims 5 to 14, wherein: The pedal shaft (420) is arranged in parallel with the first motor shaft (011).

16. The continuously variable transmission according to any one of claims 5 to 15, wherein: The pedal (410) is connected to the pedal shaft (420) via a crank assembly.

17. The continuously variable transmission according to any one of claims 1 to 16, wherein: The first motor shaft (011) and the second motor shaft (022) are arranged along the same axial direction.

18. The continuously variable transmission according to any one of claims 1 to 17, wherein: The first motor shaft (011) is inserted into the second motor shaft (022).

19. The continuously variable transmission according to any one of claims 1 to 18, wherein: The first planetary gear mechanism is coaxially arranged with the first motor shaft (011), and the second planetary gear mechanism is coaxially arranged with the second motor shaft (022).

20. An electric bicycle comprising the continuously variable transmission device according to any one of claims 1 to 19.

Images