Stepless speed change transmission device and electric bicycle

Abstract

The invention particularly relates to a stepless speed change transmission device and an electric bicycle. The stepless speed change transmission device comprises a first motor, a second motor, a first planetary gear mechanism, a second planetary gear mechanism, an idle wheel assembly, a pedal assembly and a chain wheel assembly. The first planetary gear mechanism and the second planetary gear mechanism share the same inner and outer gear ring, and the idle gear is arranged on the idle gear shaft through a bearing sleeve; the pedal shaft is sleeved with the pedal gear through a fourth overrun clutch. The first planetary gear is respectively meshed with the first sun gear and the inner teeth of the gear ring; the second planetary gear is meshed with the second sun gear and inner teeth of the gear ring, outer teeth of the gear ring are meshed with the idle gear, and the idle gear is meshed with the pedal gear. A first motor shaft of the first motor sequentially penetrates through the first overrun clutch and the first sun gear; a second motor shaft of the second motor sequentially penetrates through the second overrun clutch and the third overrun clutch. Therefore, the power is easier, more stable and smoother during riding.

Description

Technical Field

[0001] The invention relates to the technical field of electric bicycles, and in particular to a continuously variable transmission device and an electric bicycle. Background Art

[0002] Figure 1 Schematic diagram of the structure of the electric bicycle continuously variable transmission device in the prior art. Figure 1 The continuously variable transmission device of the electric bicycle comprises a first motor 12, a second motor 15, a middle shaft 9 and a first planetary gear mechanism 1 arranged coaxially with the middle shaft; the planetary gear mechanism comprises a sun gear 8, an inner and outer gear ring 4, a first planetary support 11A and a first planetary gear 11B. The sun gear 8 is sleeved on the middle shaft through a clutch, the inner and outer gear ring 4 is provided with inner gear ring teeth 4A and outer gear ring teeth 4B, the planetary gears 11B are evenly distributed on the planetary support 11A in the circumferential direction and mesh with the sun gear and the inner gear ring teeth respectively, the first motor meshes with the outer gear ring teeth through gears, one axial side of the planetary support meshes with the second motor through gears, and the other axial side is provided with an output chainring assembly 13 fixedly connected thereto. During operation, different sports mode switching and continuously variable speed function can be realized through different combinations of the three driving modes of the first motor, the second motor and the middle shaft.

[0003] However, the existing electric bicycle continuously variable transmission device has the following problems:

[0004] 1. When only the middle shaft is used as the driving input, the middle shaft drives the sun gear, planetary gear, planetary bracket, and output chainring assembly to rotate in sequence. During this process, because the inner and outer ring gears are not fixed, the planetary gears will also drive the inner and outer ring gears to rotate, and then drive the first motor to rotate, which eventually leads to the problem that the planetary bracket is not driven, but the first motor is driven to rotate in the opposite direction;

[0005] 2. When only the first motor is used as the driving input, the first motor drives the inner and outer ring gears, planetary gears, planetary brackets, and output chainring components to rotate in sequence. During this process, because the sun gear is not fixed, the planetary gears will also drive the sun gear to rotate, and then drive the middle shaft to rotate, and finally cause the pedal assembly installed on the middle shaft to rotate, which is prone to the problem of pedal injury;

[0006] 3. When the middle shaft and the first motor are used as driving 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 first, and then it can drive the sun gear to rotate, and then drive the planetary gear, planetary bracket, and output sprocket assembly to rotate. This process is extremely laborious. Summary of the invention

[0007] The objects of the present invention include, for example, providing a continuously variable transmission device and an electric bicycle, which can improve the above-mentioned technical problems so as to make the power easier, more stable and smoother when riding.

[0008] The embodiments of the present invention can be implemented as follows:

[0009] In a first aspect, the present invention provides a continuously variable transmission device, comprising:

[0010] A first motor, a second motor, a first planetary gear mechanism, a second planetary gear mechanism, an idler assembly, a pedal assembly, and a chainring assembly;

[0011] The first planetary gear mechanism comprises a first sun gear, a first planetary gear, a first planetary gear shaft, and a first planetary carrier; the second planetary gear mechanism comprises 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 inner and outer ring gears, and the inner and outer ring gears are provided with inner ring gear teeth and outer ring gear teeth;

[0012] The first planetary gears are evenly distributed in the circumferential direction in a frame structure composed of the first planetary bracket and the first planetary gear shaft, and one side of the first planetary bracket is fixedly connected to the crank assembly; the second planetary gears are evenly distributed in the circumferential direction in a frame structure composed of the second planetary bracket and the second planetary gear shaft;

[0013] The idler assembly comprises an idler and an idler shaft, wherein the idler is sleeved on the idler shaft via a bearing;

[0014] The pedal assembly comprises a pedal, a pedal shaft and a pedal gear, wherein the pedal gear is sleeved on the pedal shaft via a fourth overrunning clutch, and the pedal is eccentrically connected to the pedal shaft so as to be rotatable;

[0015] The first planetary gears are respectively meshed with the first sun gear and the inner teeth of the gear ring; the second planetary gears are respectively meshed with the second sun gear and the inner teeth of the gear ring, the outer teeth of the gear ring are meshed with the idler gear, and the idler gear is meshed with the pedal gear;

[0016] 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;

[0017] 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.

[0018] In an optional embodiment, the first motor shaft and the second motor shaft are arranged along the same axial direction.

[0019] In an optional embodiment, the first motor shaft passes through the second motor shaft.

[0020] In an optional embodiment, it further includes a shell, 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 shell, and the shell, the first end cover, and the second end cover are jointly enclosed to form a closed accommodating cavity;

[0021] The inner and outer gear rings are sleeved on the second end cover via bearings;

[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 a first overrunning clutch on the first end cover and a bearing on the second end cover side;

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

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

[0026] In an optional implementation, a motor control module is further included; the motor control module is connected to the first motor and the second motor respectively.

[0027] In an optional embodiment, a speed sensor assembly is further included; the speed sensor assembly is sleeved on the pedal shaft, and the speed sensor assembly is electrically connected to the motor control module.

[0028] In an optional embodiment, the pedal shaft is arranged in parallel with the first motor shaft.

[0029] In an optional embodiment, the pedal is connected to the pedal shaft via a crank assembly.

[0030] In an optional embodiment, 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.

[0031] In a second aspect, the present invention provides an electric bicycle comprising the continuously variable transmission device described in any one of the aforementioned embodiments.

[0032] The beneficial effects of the embodiments of the present invention include, for example:

[0033] The continuously variable transmission device of this scheme can realize different sports 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 so that the person can There is neither a feeling of stepping on the air nor a sense of resistance when riding, and a better riding experience can be obtained; when the first motor, the second motor and the pedal are used as drive inputs at the same time, the force of the first motor on the inner and outer gear rings is overcome by the second motor, thereby avoiding the force of the first motor on the inner and outer gear rings being transmitted to the pedals, and the motor control module automatically adjusts the speed and driving force of the first motor and 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 load size on the pedal, so that people have neither a feeling of stepping on the air nor a sense of resistance when riding, and a better riding experience can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 It is a structural schematic diagram of a continuously variable transmission device for an electric bicycle in the prior art;

[0036] Figure 2 Schematic diagram of the structure of a continuously variable transmission device according to an embodiment of the present invention.

[0037] 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-inner and outer ring gears; 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

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] 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, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0043] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0044] The purpose of this scheme is to provide a continuously variable transmission device for electric bicycles, so as to solve the problem that the planetary gears will drive the inner and outer gear rings to rotate due to the unfixed inner and outer gear rings, and then drive the first motor to rotate, which eventually leads to the planetary bracket not being driven, but the first motor is driven to rotate in the opposite direction; solve the problem that the sun gear is not fixed, the planetary gears will drive the sun gear to rotate, and then drive the middle shaft to rotate, and finally cause the pedal assembly installed on the middle shaft to rotate, which is easy to cause the pedal to hurt people; solve the problem that when the middle shaft and the first motor are used as driving inputs at the same time, because the driving force directions of the middle shaft and the first motor are opposite, the middle shaft needs to input a large driving force, first overcome the driving force of the first motor, and then drive the sun gear to rotate, and then drive the planetary gear, planetary bracket, and output chainring assembly to rotate, and this process is extremely laborious. Accordingly, a continuously variable transmission device and an electric bicycle are provided in the following embodiments.

[0045] Figure 2 Schematic diagram of the structure of the continuously variable transmission device of this embodiment of the present invention.

[0046] Please refer to Figure 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.

[0047] 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 inner and outer ring gear 600, and the inner and outer ring gear 600 is provided with inner ring gear teeth and outer ring gear teeth;

[0048] The first planetary gears 120 are evenly distributed in the circumferential direction in the 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 crank assembly 500; the second planetary gears 220 are evenly distributed in the circumferential direction in the frame structure composed of the second planetary bracket 240 and the second planetary gear shaft 230;

[0049] The idler assembly includes an idler 310 and an idler shaft 320, wherein the idler 310 is sleeved on the idler shaft 320 via a bearing;

[0050] 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.

[0051] 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 outer teeth of the gear ring are meshed with the idler gear 310, and the idler gear 310 is meshed with the pedal gear 430;

[0052] The first motor 010 is provided with a first motor shaft 011, and the first motor shaft 011 passes through the first overrunning clutch 710 and the first sun gear 110 in sequence;

[0053] The second motor 020 is provided with a second motor shaft 022 , and the second motor shaft 022 passes through the second overrunning clutch 720 on the second planetary support 240 and the third overrunning clutch 730 on the second sun gear 210 in sequence.

[0054] Furthermore, the continuously variable transmission device also includes a housing 810, a first end cover 821, and a second end cover 822; the first end cover 821 and the second end cover 822 are relatively arranged on both sides of the housing 810, and the housing 810, the first end cover 821, and the second end cover 822 are enclosed together to form a closed accommodating cavity. Specifically, the housing 810, the first end cover 821, and the second end cover 822, the housing 810 is a cylindrical structure, and the first end cover 821 and the second end cover 822 are respectively arranged on the opening in the thickness direction of the housing 810 to form a closed accommodating cavity. In this way, the safety and stability of the speed change process are guaranteed, and each component can be firmly supported.

[0055] As can be seen from the figure, the continuously variable transmission device mainly includes a first motor 010, a first motor shaft 011 and a first planetary gear mechanism coaxially arranged with the first motor shaft 011, a second motor 020, a second motor shaft 022 and a second planetary gear mechanism coaxially arranged 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, a speed sensor assembly 920, and a motor control module 910.

[0056] The first planetary gear mechanism mainly includes a first sun gear 110, a first planetary gear 120, a first planetary gear shaft 130, a first planetary support 140, and an inner and outer ring gear 600; the second planetary gear mechanism mainly includes a second sun gear 210, a second planetary gear 220, a second planetary gear shaft 230, a second planetary support 240, and an inner and outer ring gear 600. The first planetary gear mechanism and the second planetary gear mechanism share the same inner and outer ring gear 600, and the inner and outer ring gear 600 is provided with inner ring gear teeth and outer ring gear teeth. The inner and outer ring gear 600 is mounted on the second end cover 822 through a bearing sleeve.

[0057] The first planetary gears 120 are evenly distributed in the circumferential direction in the frame structure composed of the first planetary bracket 140 and the first planetary gear shaft 130. A toothed disc assembly 500 is fixedly connected to the first planetary bracket 140 on one side, and the toothed disc assembly 500 is connected to the rear wheel drive chain. The second planetary gears 220 are evenly distributed in the circumferential direction in the frame structure composed of the second planetary bracket 240 and the second planetary gear shaft 230. The second planetary bracket 240 is fixed between the first end cover 821 and the second end cover 822. The first planetary gears 120 are respectively meshed with the first sun gear 110 and the inner teeth of the gear ring, the second planetary gears 220 are respectively meshed with the second sun gear 210 and the inner teeth of the gear ring, the outer teeth of the gear ring are meshed with the idler gear 310, and the idler gear 310 is meshed with the pedal gear 430.

[0058] The first motor shaft 011 is sleeved 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 bearing on the second end cover 822.

[0059] 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 .

[0060] The idler assembly mainly includes an idler 310 and an idler shaft 320. The idler 310 is sleeved on the idler shaft 320 through a bearing. The idler shaft 320 is supported and fixed between the second planetary bracket 240 and the second end cover 822 through a bearing. 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 through the fourth overrunning clutch 740. The pedal shaft 420 is supported and fixed between the first end cover 821 and the second end cover 822 through a bearing.

[0061] The continuously variable transmission device further includes a motor control module 910 and a speed sensor assembly 920; the motor control module 910 is respectively connected to the first motor 010 and the second motor 020. The speed sensor assembly 920 is sleeved on the pedal shaft 420, and the speed sensor assembly 920 is electrically connected to the motor control module 910. In this way, the first motor 010 and the second motor 020 can be accurately controlled to coordinate the speed of the pedal shaft 420.

[0062] Specifically, the speed sensor assembly 920 is mounted on the pedal shaft 420, and can monitor the speed of the pedal shaft 420, and feed back the monitoring data to the motor control module 910 to determine whether each motor is assisting. In actual operation, different sports mode switching and stepless speed change functions can be achieved through different combinations of the first motor 010, the second motor 020, and the pedal 410.

[0063] It can also be seen from the figure that the first motor shaft 011 and the second motor shaft 022 are arranged along the same axis direction. Such an arrangement can further simplify the space occupied by the first planetary gear mechanism and the second planetary gear mechanism to improve the efficiency of speed change.

[0064] Optionally, in this embodiment, 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.

[0065] Furthermore, in this embodiment, the pedal shaft 420 is arranged in parallel with the first motor shaft 011. That is, the pedal shaft 420 is parallel to the first motor shaft 011 and the second motor shaft 022. Such an arrangement can ensure that the power can be transmitted more smoothly and reliably through the gears, while also avoiding the inconvenience in processing and manufacturing caused by the special-shaped structure.

[0066] Optionally, in this embodiment, 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.

[0067] When in use, the continuously variable transmission device has at least the following motion modes to achieve transmission and speed change:

[0068] Movement mode 1: only the pedal 410 is used as the driving input, and the pedal 410 drives the pedal gear 430, the idler gear 310, the inner and outer ring gears 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; 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; the second sun gear 210 only rotates on its own under the action of the third overrunning clutch 730, and does not drive the second motor 020 to rotate;

[0069] 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 bracket 140, and the chainring assembly 500 to rotate in sequence; during this process, the inner and outer ring gears 600 remain 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.

[0070] 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 inner and outer ring gears 600, the first planetary gears 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, so that the first motor 010 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;

[0071] Movement mode 4: When the first motor 010 and the second motor 020 are used as driving inputs at the same time, the first motor 010 drives the first sun gear 110, the first planetary gear 120, the first planetary bracket 140, and the chainring assembly 500 to rotate in sequence, and the second motor 020 drives the second sun gear 210, the second planetary gear 220, the inner and outer ring gear 600, the first planetary gear 120, the first planetary bracket 140, and the chainring assembly 500 to rotate in sequence through the third overrunning clutch 730, and the two motors drive the chainring assembly 500 to rotate in the same direction; during this process, 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;

[0072] 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 inner and outer ring gear 600, the first planetary gear 120, the first planetary bracket 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 inner and outer ring gear 600, the first planetary gear 120, the first planetary bracket 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 people can have neither a sense of stepping on air nor a sense of resistance when riding, and can get a better riding experience;

[0073] Movement mode six: When the first motor 010, the second motor 020 and the pedal 410 are used as driving inputs at the same time, the first motor 010 drives the first sun gear 110, the first planetary gear 120, the first planetary bracket 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 inner and outer ring gear 600, the first planetary gear 120, the first planetary bracket 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 inner and outer ring gear 600, the first planetary gear 120, the first planetary bracket 140, and the chainring assembly 500 to rotate in sequence through the fourth overrunning clutch 740, and 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 inner and outer gear rings 600 is overcome by the second motor 020, thereby preventing the force exerted by the first motor 010 on the inner and outer gear rings 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 get a better riding experience.

[0074] In a second aspect, the present invention provides an electric bicycle, comprising the continuously variable transmission device of any one of the aforementioned embodiments. Such an electric bicycle comprises the continuously variable transmission device, and thus has all the beneficial effects of the continuously variable transmission device, specifically, the speed change of such an electric bicycle is stable, smooth, and effortless to ride.

[0075] In summary, the embodiments of the present invention provide a continuously variable transmission device and an electric bicycle, which have at least the following advantages:

[0076] 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;

[0077] 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;

[0078] 3. When the second motor 020 and the pedal 410 are used as driving inputs at the same time, 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 people can have neither a sense of stepping on air nor a sense of resistance when riding, and can obtain a better riding experience;

[0079] 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 inner and outer gear rings 600 is overcome by the second motor 020, thereby preventing the force exerted by the first motor 010 on the inner and outer gear rings 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, thereby effectively adjusting the load 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.

[0080] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A continuously variable transmission device, characterized in that: include: 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); 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 inner and outer ring gear (600), and the inner and outer ring gear (600) is provided with inner ring gear teeth and outer ring gear teeth; The first planetary gears (120) are evenly distributed in the circumferential direction 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 gears (220) are evenly distributed in the circumferential direction in a frame structure composed of the second planetary bracket (240) and the second planetary gear shaft (230); The idler wheel assembly comprises an idler wheel (310) and an idler wheel shaft (320), wherein the idler wheel (310) is sleeved on the idler wheel shaft (320) via a bearing; 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); The first planetary gear (120) is meshed with the first sun gear (110) and the inner teeth of the ring gear respectively; The second planetary gear (220) is respectively meshed with the second sun gear (210) and the inner teeth of the gear ring, the outer teeth of the gear ring are meshed with the idler gear (310), and the idler gear (310) is meshed with the pedal gear (430); 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, characterized in that: The first motor shaft (011) and the second motor shaft (022) are arranged along the same axial direction.

3. The continuously variable transmission device according to claim 2, characterized in that: The first motor shaft (011) is inserted into the second motor shaft (022).

4. The continuously variable transmission device according to claim 1, characterized in that: It also includes a shell (810), a first end cover (821), and a second end cover (822); the first end cover (821) and the second end cover (822) are relatively arranged on both 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; The inner and outer gear rings (600) are sleeved on the second end cover (822) via bearings; 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.

5. The continuously variable transmission device according to claim 1, characterized in that: It also includes a motor control module (910); the motor control module (910) is connected to the first motor (010) and the second motor (020) respectively.

6. The continuously variable transmission device according to claim 5, characterized in that: It also includes a rotation speed sensor component (920); 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).

7. The continuously variable transmission device according to claim 1, characterized in that: The pedal shaft (420) is arranged in parallel with the first motor shaft (011).

8. The continuously variable transmission device according to claim 1, characterized in that: The pedal (410) is connected to the pedal shaft (420) via a crank assembly.

9. The continuously variable transmission device according to claim 1, characterized in that: 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).

10. An electric bicycle, characterized in that: A continuously variable transmission comprising the stepless transmission device as claimed in any one of claims 1 to 9.

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