Electric power-assisted assembly and electric power-assisted bicycle

Abstract

The utility model relates to the field of electric power-assisted bicycles, and discloses an electric power-assisted assembly which comprises a power-assisted motor, a first ratchet wheel, a second ratchet wheel and a wheel axle, the power-assisted motor comprises a stator and a rotor, the first ratchet wheel comprises a first inner ring and a first outer ring, and the second ratchet wheel comprises a second inner ring and a second outer ring; the stator is fixedly connected to the wheel axle, the wheel axle is used for fixedly installing a frame, the rotor, the first inner ring and the second inner ring are rotationally connected to the wheel axle, one side of the rotor is fixedly connected with the first inner ring, the first outer ring and the second outer ring are used for fixedly connecting a hub, and the second inner ring is used for fixedly connecting a chain wheel disc. The power-assisted motor and the first ratchet are located on the first side of the hub, and the second ratchet and the sprocket are located on the second side of the hub. The embodiment of the utility model further provides an electric power-assisted bicycle comprising the electric power-assisted assembly. The electric power assisting assembly can be conveniently installed after an existing bicycle is refitted.

Description

Technical Field

[0001] The present application relates to the technical field of electric power-assisted bicycles, and more specifically, to an electric power-assisted component and an electric power-assisted bicycle. Background Art

[0002] An electric power-assisted bicycle is a bicycle with an electric power-assisted component. The electric power-assisted bicycle drives the chain through the pedals to drive the wheels, rather than directly driving the wheels through the throttle to control the motor. Electric power-assisted bicycles use batteries as an auxiliary power source and have a motor-driven power-assisted system. They are a means of transportation that integrates human riding and motor assistance. The riding method of an electric power-assisted bicycle is basically the same as that of a traditional bicycle. When working, the electric power-assisted bicycle can output electric power through the motor, reduce physical exertion, and is easy to use. The research and development focus of electric power-assisted bicycles is to avoid interference between motor assistance and human power during riding. The power-assisted methods of electric power-assisted bicycles currently on the market include electric power-assisted drive solutions that use motors and flywheels to avoid interference between motor assistance and human power.

[0003] Patent CN106364622B (application number: 201610904499.8) provides an integrated electric power assist device for bicycles, wherein the wheel hub motor assembly, the main control circuit board and the battery assembly are electrically connected, the battery assembly and the main control circuit board are both contained in the central accommodating cavity of the housing, the axial left and right sides of the central accommodating cavity are sealed by the left end plate and the right cover plate respectively, the outer circumferential surface of the housing is connected to the rear wheel of the bicycle through spokes, the wheel hub motor assembly is integrally assembled in the inner ring cavity of the annular battery assembly, the axial left and right ends of the wheel hub motor assembly are connected to the rear wheel bracket of the bicycle through the left support shaft and the right support shaft respectively, and a flywheel is installed on the axially extending end of the right support shaft. The electric power assist device in patent CN106364622B is connected to the rear wheel of the bicycle through the flywheel and the outer circumferential surface of the housing through spokes, resulting in a complex power assist structure of the electric power assist bicycle, and it is difficult to install the electric power assist assembly after modifying the existing bicycle. Utility Model Content

[0004] The purpose of this application is to provide an electric power-assist component and an electric power-assist bicycle, which solves the technical problem that it is difficult to install the electric power-assist component after modifying the existing bicycle, and achieves the technical effect of facilitating the installation of the electric power-assist component after modifying the existing bicycle.

[0005] An electric power-assisting assembly provided in an embodiment of the present application includes a power-assisting motor, a first ratchet, a second ratchet and a wheel axle, the power-assisting motor includes a stator and a rotor, the first ratchet includes a first inner ring and a first outer ring, and the second ratchet includes a second inner ring and a second outer ring; the stator is fixedly connected to the wheel axle, and the wheel axle is used to fix and install a frame, the rotor, the first inner ring and the second inner ring are rotatably connected to the wheel axle, one side of the rotor is fixedly connected to the first inner ring, the first outer ring and the second outer ring are used to fix and connect the wheel hub, and the second inner ring is used to fix and connect the sprocket disk, the power-assisting motor and the first ratchet are located on the first side of the wheel hub, and the second ratchet and the sprocket disk are located on the second side of the wheel hub.

[0006] In one possible implementation, a recess is provided on one side of the rotor, a protrusion is provided on the first inner ring, the protrusion is provided in the recess, the protrusion and the recess are locked with each other, a first flange is provided on the circumference of the rotor, a second flange is provided on the circumference of the first inner ring, and the first flange and the second flange are connected by bolts.

[0007] In another possible implementation, both the recessed portion and the raised portion are circular, a plurality of circumferential clamping blocks are arranged in an array on the circumference of the recessed portion, and a locking structure cooperating with the plurality of circumferential clamping blocks is provided on the raised portion.

[0008] In another possible implementation, an axial hole is provided in the middle of the recessed portion, a convex ring is provided circumferentially of the axial hole, a plurality of convex ring blocks are arrayed circumferentially of the convex ring, and a locking structure cooperating with the plurality of convex ring blocks is provided on the raised portion.

[0009] In another possible implementation, the number of the circumferential clamping blocks and the number of the convex ring clamping blocks are both three, and each circumferential clamping block is arranged at a middle position opposite to two convex ring clamping blocks.

[0010] In another possible implementation, the height of the circumferential clamping block is greater than the height of the convex ring clamping block, and the heights of the circumferential clamping block and the convex ring clamping block are both 1 cm to 2 cm.

[0011] In another possible implementation, the width of the power-assisting motor and the first ratchet is a first width, the width of the second ratchet and the sprocket is a second width, and the difference between the first width and the second width is less than 3 cm.

[0012] In another possible implementation, the first outer ring, the second outer ring and the wheel hub are integrally provided.

[0013] In another possible implementation, the rotor and the first inner ring are both rotatably connected to the wheel axle via a first bearing, and the second inner ring is rotatably connected to the wheel axle via a second bearing, and the first bearing and the second bearing have the same specifications.

[0014] The embodiment of the present application also provides an electric power-assisted bicycle, comprising the above-mentioned electric power-assisted assembly.

[0015] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0016] The embodiment of the present application provides an electric power assist assembly, including a power assist motor, a first ratchet, a second ratchet and a wheel axle, the power assist motor includes a stator and a rotor, the first ratchet includes a first inner ring and a first outer ring, and the second ratchet includes a second inner ring and a second outer ring; the stator is fixedly connected to the wheel axle, the wheel axle is used to fix the frame, the rotor, the first inner ring and the second inner ring are rotatably connected to the wheel axle, one side of the rotor is fixedly connected to the first inner ring, the first outer ring and the second outer ring are used to fix the wheel hub, the second inner ring is used to fix the sprocket, the power assist motor and the first ratchet are located on the first side of the wheel hub, and the second ratchet and the sprocket are located on the second side of the wheel hub. The electric power assist assembly in the embodiment of the present application is arranged on the side of the wheel, and the motor is connected to the ratchet laterally. During installation, it is only necessary to assemble the assembled power assist motor, the first ratchet and the second ratchet on the wheel axle in sequence, which is convenient for assembling the electric power assist assembly, improving the efficiency of installing the electric power assist assembly after modifying the existing bicycle, and reducing the modification cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of an electric power assist assembly provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of a partial structure of an electric power assist assembly provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of a partial structure of an electric power assist assembly provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the structure of another electric power assist assembly provided in an embodiment of the present application;

[0022] In the figure, 1, power-assisting motor; 11, stator; 12, rotor; 121, recessed portion; 121a, circumferential block; 121b, axial hole; 121c, convex ring; 121d, convex ring block; 122, first flange; 2, first ratchet; 21, first inner ring; 211, raised portion; 212, second flange; 22, first outer ring; 22a, first brake disc; 3, second ratchet; 31, second inner ring; 32, second outer ring; 32a, second brake disc; 4, wheel axle; 41, first bearing; 42, second bearing; 5, frame; 6, wheel hub; 7, sprocket. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] It should be noted that when a component or structure is referred to as being "fixed to" or "disposed on" another component or structure, it may be directly on the other component or structure or indirectly on the other component or structure. When a component or structure is referred to as being "connected to" another component or structure, it may be directly connected to the other component or structure or indirectly connected to the other component or structure.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or a component or structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In the existing electric power-assist devices, the power-assist structure of the electric power-assist bicycle is complicated, and it is difficult to install the electric power-assist assembly after modifying the existing bicycle.

[0028] Based on the above reasons, the embodiment of the present application provides an electric power assist assembly, including a power assist motor, a first ratchet, a second ratchet and a wheel axle, the power assist motor includes a stator and a rotor, the first ratchet includes a first inner ring and a first outer ring, and the second ratchet includes a second inner ring and a second outer ring; the stator is fixedly connected to the wheel axle, the wheel axle is used to fix the frame, the rotor, the first inner ring and the second inner ring are rotatably connected to the wheel axle, one side of the rotor is fixedly connected to the first inner ring, the first outer ring and the second outer ring are used to fix the wheel hub, the second inner ring is used to fix the sprocket, the power assist motor and the first ratchet are located on the first side of the wheel hub, and the second ratchet and the sprocket are located on the second side of the wheel hub. The electric power assist assembly in the embodiment of the present application is arranged on the side of the wheel, and the motor is connected to the ratchet laterally. During installation, it is only necessary to assemble the assembled power assist motor, the first ratchet, and the second ratchet on the wheel axle in sequence, which is convenient for assembling the electric power assist assembly, improving the efficiency of installing the electric power assist assembly after modifying the existing bicycle, and reducing the modification cost.

[0029] In some scenarios, an electric power-assisting assembly of an embodiment of the present application can be applied to an electric power-assisting device on a bicycle, and the electric power-assisting assembly can be installed on an existing bicycle, thereby improving the modification efficiency of the electric power-assisting assembly.

[0030] An electric power assist component provided in an embodiment of the present application is described in detail below with reference to specific examples.

[0031] Figure 1 A schematic diagram of the structure of an electric power assist assembly provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, an electric power-assisting assembly in an embodiment of the present application includes a power-assisting motor 1, a first ratchet 2, a second ratchet 3 and a wheel axle 4, the power-assisting motor 1 includes a stator 11 and a rotor 12, the first ratchet 2 includes a first inner ring 21 and a first outer ring 22, and the second ratchet 3 includes a second inner ring 31 and a second outer ring 32.

[0032] When the electric power-assisting assembly is working, the power-assisting motor 1 is used to provide power, the first ratchet 2 and the second ratchet 3 can ensure unidirectional power transmission, and the wheel axle 4 is used to support the electric power-assisting assembly and install it on the bicycle.

[0033] like Figure 1 As shown, the stator 11 is fixedly connected to the wheel axle 4, and the wheel axle 4 is used to fix the mounting frame 5. The rotor 12, the first inner ring 21 and the second inner ring 31 are rotatably connected to the wheel axle 4. One side of the rotor 12 is fixedly connected to the first inner ring 21. The first outer ring 22 and the second outer ring 32 are used to fix the connection to the wheel hub 6. The second inner ring 31 is used to fix the connection to the sprocket 7. The power-assisted motor 1 and the first ratchet 2 are located on the first side of the wheel hub 6, and the second ratchet 3 and the sprocket 7 are located on the second side of the wheel hub 6.

[0034] Structurally, the first ratchet 2 includes a first inner ring 21 and a first outer ring 22, and a ratchet structure for realizing the ratchet function is provided between the first inner ring 21 and the first outer ring 22, so that the first ratchet 2 can realize the function of unidirectional power transmission. Similarly, the second ratchet 3 includes a second inner ring 31 and a second outer ring 32, and a ratchet structure for realizing the ratchet function is provided between the second inner ring 31 and the second outer ring 32.

[0035] Structurally, the stator 11 is fixedly connected to the wheel axle 4, so that the stator 11 and the wheel axle 4 are stably fixed. The wheel axle 4 is used to fix the frame 5, so that the electric power assist assembly can be fixedly installed on the frame 5, and the frame 5 is the main structure of the bicycle.

[0036] Structurally, the rotor 12 , the first inner ring 21 , and the second inner ring 31 are rotatably connected to the wheel axle 4 , so that the rotor 12 , the first inner ring 21 , and the second inner ring 31 can all rotate relative to the wheel axle 4 .

[0037] like Figure 1 As shown, one side of the rotor 12 is fixedly connected to the first inner ring 21, so that the rotor 12 can transmit power to the first inner ring 21, and the first outer ring 22 and the second outer ring 32 are used to be fixedly connected to the wheel hub 6. At the same time, due to the one-way power transmission characteristics between the first inner ring 21 and the first outer ring 22, the first inner ring 21 and the first outer ring 22 can only cooperate with each other to transmit power to the wheel hub 6 in one direction.

[0038] like Figure 1 As shown, the second inner ring 31 is used to fix the sprocket wheel 7, so that the second inner ring 31 and the sprocket wheel 7 move together, and a plurality of sprockets are installed on the sprocket wheel 7, so that the chain power can be transmitted through the sprocket wheel 7. At the same time, due to the one-way power transmission characteristics of the second inner ring 31 and the second outer ring 32, the second inner ring 31 and the second outer ring 32 can only cooperate with each other to transmit power to the wheel hub 6 in one direction.

[0039] like Figure 1 As shown, the power-assisting motor 1 and the first ratchet 2 are located on the first side of the wheel hub 6, and the second ratchet 3 and the sprocket 7 are located on the second side of the wheel hub 6, so that the weight on both sides of the wheel hub 6 and the space occupied by the components can be relatively balanced.

[0040] The beneficial effect brought about by the above-mentioned implementation method is that the power-assist motor is arranged on the side of the wheel. During installation, it is only necessary to assemble the assembled power-assist motor, the first ratchet, and the second ratchet on the wheel axle in sequence, which facilitates the assembly of the electric power-assist component and improves the efficiency of installing the electric power-assist component after modifying the existing bicycle.

[0041] The beneficial effect brought about by the above-mentioned implementation method is that the weight on both sides of the wheel hub and the space occupied by the components can be relatively balanced, thereby improving the balance of the electric power steering assembly during use and improving the stability of the electric power steering assembly when used on the vehicle.

[0042] In some implementations, Figure 2 A partial structural diagram of an electric power assist assembly provided in an embodiment of the present application is shown in FIG. Figure 1 and Figure 2 As shown, a recessed portion 121 is provided on one side of the rotor 12, a raised portion 211 is provided on the first inner ring 21, the raised portion 211 is arranged in the recessed portion 121, the raised portion 211 and the recessed portion 121 are locked with each other, a first flange 122 is provided on the circumference of the rotor 12, a second flange 212 is provided on the circumference of the first inner ring 21, and the first flange 122 and the second flange 212 are connected by bolts.

[0043] Structurally, the protrusion 211 and the recess 121 are locked with each other, so that the protrusion 211 and the recess 121 are locked with each other to transmit power.

[0044] like Figure 2 As shown, a first flange 122 is provided on the circumference of the rotor 12, and a second flange 212 is provided on the circumference of the first inner ring 21. The first flange 122 and the second flange 212 are connected by bolts. During installation, it is only necessary to directly connect the first flange 122 and the second flange 212 by bolts.

[0045] The beneficial effect brought about by the above implementation method is that the protrusion and the recessed portion are locked with each other to transmit power, thereby realizing stable transmission of the motor power of the power assist component.

[0046] The beneficial effect brought about by the above implementation method is that, when an existing bicycle is modified, the first flange and the second flange are connected by bolts, thereby improving the convenience of modifying the bicycle into a power-assisted bicycle.

[0047] In some implementations, Figure 3 A partial structural diagram of an electric power assist assembly provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, both the recessed portion 121 and the raised portion 211 are circular, a plurality of circumferential clamping blocks 121 a are arranged in an array in the circumferential direction of the recessed portion 121 , and a locking structure cooperating with the plurality of circumferential clamping blocks 121 a is provided on the raised portion 211 .

[0048] like Figure 2 and Figure 3 As shown, in terms of structure, both the recessed portion 121 and the raised portion 211 are circular, so that the raised portion 211 can be easily snap-fitted into the recessed portion 121 , thereby facilitating the assembly of the recessed portion 121 and the raised portion 211 .

[0049] like Figure 2 and Figure 3 As shown, a plurality of circumferential clamping blocks 121 a are arranged in an array in the circumference of the recessed portion 121 , and a locking structure cooperating with the plurality of circumferential clamping blocks 121 a is provided on the raised portion 211 , so that the plurality of circumferential clamping blocks 121 a can transmit power between the recessed portion 121 and the raised portion 211 .

[0050] The beneficial effect brought about by the above implementation method is that the circular recessed portion and the raised portion can be easily mounted on each other, and the plurality of circumferential clamping blocks can transmit power in the circumferential direction of the recessed portion and the raised portion.

[0051] In some implementations, an axial hole 121b is provided in the middle of the recessed portion 121, a protrusion 121c is provided circumferentially of the axial hole 121b, a plurality of protrusion blocks 121d are arrayed circumferentially of the protrusion 121c, and a locking structure cooperating with the plurality of protrusion blocks 121d is provided on the raised portion 211.

[0052] like Figure 3 As shown, an axial hole 121 b is provided in the middle of the recessed portion 121 , and the axial hole 121 b is used for mounting the wheel axle 4 .

[0053] like Figure 3 As shown, a protrusion 121c is provided on the circumference of the shaft hole 121b, and a plurality of protrusion blocks 121d are arranged in an array on the circumference of the protrusion 121c, so that the protrusion 121c and the plurality of protrusion blocks 121d can cooperate with each other for reinforcement.

[0054] Structurally, a locking structure that cooperates with a plurality of convex ring blocks 121 d is provided on the protruding portion 211 , so that the protruding portion 211 and the convex ring blocks 121 d can cooperate with each other to realize power transmission.

[0055] The beneficial effect brought about by the above-mentioned implementation method is that the bead and multiple bead blocks can cooperate with each other for reinforcement, thereby improving the stability of the bead block. A locking structure that cooperates with multiple bead blocks is provided on the raised portion, so that the raised portion and the bead block can cooperate with each other to realize power transmission in the middle of the recessed portion, and cooperate with multiple circumferential blocks to transmit power to the raised portion in the circumferential direction of the recessed portion, thereby improving the stability of power transmission between the recessed portion and the raised portion.

[0056] In some implementations, the number of the circumferential clamping block 121a and the number of the raised ring clamping block 121d are both three, and each circumferential clamping block 121a is disposed at a middle position opposite to two raised ring clamping blocks 121d.

[0057] like Figure 3As shown, in terms of structure, each circumferential clamping block 121a is arranged directly opposite to the middle position of the two convex clamping blocks 121d, so that the positions of the circumferential clamping block 121a and the convex clamping block 121d are staggered with each other, thereby improving the uniformity of the circumferential clamping block 121a and the convex clamping block 121d in force transmission.

[0058] The beneficial effects brought about by the above implementation method are that the uniformity of the circumferential clamping block and the convex ring clamping block during force transmission is improved, the reliability of power transmission between the recessed portion and the raised portion is improved, and the structural reliability of the recessed portion and the raised portion is improved.

[0059] In some implementations, the height of the circumferential clamping block 121a is greater than the height of the protruding ring clamping block 121d, and the heights of the circumferential clamping block 121a and the protruding ring clamping block 121d are both 1 cm to 2 cm.

[0060] Structurally, the height of the circumferential clamping block 121a is greater than the height of the convex clamping block 121d, so that the circumferential clamping block 121a can be used as the main structure for transmitting torque, thereby protecting the strength of the convex clamping block 121d.

[0061] Structurally, the heights of the circumferential clamping block 121a and the convex clamping block 121d are both 1 cm to 2 cm, so that the heights of the circumferential clamping block 121a and the convex clamping block 121d are both at least 1 cm, ensuring the strength of the circumferential clamping block 121a and the convex clamping block 121d.

[0062] The beneficial effect brought about by the above-mentioned implementation method is that the height of the circumferential clamping block is greater than the height of the convex ring clamping block, thereby protecting the strength of the convex ring clamping block; at the same time, the heights of the circumferential clamping block and the convex ring clamping block are both at least 1 cm, ensuring the strength of the circumferential clamping block and the convex ring clamping block.

[0063] In some implementations, the width of the power-assisting motor 1 and the first ratchet 2 is a first width, the width of the second ratchet 3 and the sprocket 7 is a second width, and the difference between the first width and the second width is less than 3 cm.

[0064] like Figure 1 As shown, structurally, the width of the power-assisting motor 1 and the first ratchet 2 is the first width D1, the width of the second ratchet 3 and the sprocket 7 is the second width D2, and the difference between the first width D1 and the second width D2 is less than 3 cm, so that the first width D1 and the second width D2 are not much different, ensuring that the space required for the installation of components on both sides of the hub 6 is basically the same.

[0065] The beneficial effect brought about by the above implementation method is that the space required for installing the components on both sides of the wheel hub is basically the same, which improves the balance of the two sides of the wheel hub and can also improve the appearance of the vehicle.

[0066] In some implementations, the first outer ring 22 , the second outer ring 32 and the hub 6 are integrally formed.

[0067] like Figure 1 As shown, in terms of structure, the first outer ring 22, the second outer ring 32 and the hub 6 that are integrally arranged facilitate the assembly of the first ratchet 2 and the second ratchet 3, and also improve the installation stability of the first ratchet 2 and the second ratchet 3.

[0068] In some implementations, the rotor 12 and the first inner ring 21 are both rotatably connected to the wheel axle 4 via a first bearing 41, and the second inner ring 31 is rotatably connected to the wheel axle 4 via a second bearing 42. The first bearing 41 and the second bearing 42 have the same specifications.

[0069] like Figure 1 As shown, structurally, the first bearing 41 and the second bearing 42 have the same specifications, so that when the rotor 12 and the first inner ring 21 bear weight through the first bearing 41, and when the second inner ring 31 bears weight through the second bearing 42, the bearings have the same bearing capacity, thereby improving the service life of the electric power steering assembly; at the same time, the first bearing 41 and the second bearing 42 have the same specifications, thereby improving the convenience of assembling the electric power steering assembly.

[0070] In some implementations, Figure 4 A schematic diagram of the structure of another electric power assist assembly provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, a first brake disc 22a is provided on the first outer ring 22, and a second brake disc 32a is provided on the second outer ring. The first brake disc 22a and the second brake disc 32a can be used as a brake component of the vehicle in conjunction with brake pads, without the need to install additional brake discs, thereby improving the integration of the electric power assist component.

[0071] At the same time, the first brake disc 22a and the second brake disc 32a can be used as brakes independently of each other. The first brake disc 22a and the second brake disc 32a can brake on both sides of the electric power assist component at the same time, thereby improving the stability of the electric power assist component during braking.

[0072] The beneficial effect brought about by the above-mentioned implementation method is that, since the speed of the electric power-assisted vehicle is greater than the power of an ordinary vehicle, by providing a first brake disc and a second brake disc, the braking performance and stability of the electric power-assisted assembly can be improved.

[0073] The beneficial effect brought about by the above implementation method is that the first outer ring, the second outer ring and the wheel hub are integrally arranged, and there is no need to install a separate brake disc, thereby improving the integration of the electric power steering assembly.

[0074] The embodiment of the present application also provides an electric power-assisted bicycle, comprising the electric power-assisted assembly as described above. By applying the electric power-assisted assembly as described above, the electric power-assisted bicycle has the beneficial effects of the electric power-assisted assembly as described above, which will not be described in detail here.

[0075] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An electric power assist assembly, characterized in that: The invention comprises a power-assisting motor (1), a first ratchet (2), a second ratchet (3) and a wheel shaft (4); the power-assisting motor (1) comprises a stator (11) and a rotor (12); the first ratchet (2) comprises a first inner ring (21) and a first outer ring (22); and the second ratchet (3) comprises a second inner ring (31) and a second outer ring (32); The stator (11) is fixedly connected to the wheel shaft (4), and the wheel shaft (4) is used for fixedly installing the frame (5). The rotor (12), the first inner ring (21) and the second inner ring (31) are rotatably connected to the wheel shaft (4). One side of the rotor (12) is fixedly connected to the first inner ring (21), the first outer ring (22) and the second outer ring (32) are used for fixedly connecting to the wheel hub (6), and the second inner ring (31) is used for fixedly connecting to the sprocket wheel (7). The power-assisting motor (1) and the first ratchet (2) are located on the first side of the wheel hub (6), and the second ratchet (3) and the sprocket wheel (7) are located on the second side of the wheel hub (6).

2. The electric power assist assembly according to claim 1, characterized in that: A recessed portion (121) is provided on one side of the rotor (12), a raised portion (211) is provided on the first inner ring (21), the raised portion (211) is arranged in the recessed portion (121), the raised portion (211) and the recessed portion (121) are locked with each other, a first flange (122) is provided on the circumference of the rotor (12), a second flange (212) is provided on the circumference of the first inner ring (21), and the first flange (122) and the second flange (212) are connected by bolts.

3. The electric power assist assembly according to claim 2, characterized in that: The recessed portion (121) and the raised portion (211) are both circular, a plurality of circumferential clamping blocks (121a) are arranged in an array in the circumference of the recessed portion (121), and a locking structure cooperating with the plurality of circumferential clamping blocks (121a) is provided on the raised portion (211).

4. The electric power assist assembly according to claim 3, characterized in that: An axial hole (121b) is provided in the middle of the recessed portion (121), a convex ring (121c) is provided on the circumference of the axial hole (121b), a plurality of convex ring clamping blocks (121d) are arranged in an array on the circumference of the convex ring (121c), and a locking structure cooperating with the plurality of convex ring clamping blocks (121d) is provided on the convex portion (211).

5. The electric power assist assembly according to claim 4, characterized in that: The number of the circumferential clamping blocks (121a) and the convex ring clamping blocks (121d) is three, and each circumferential clamping block (121a) is arranged directly opposite to the middle position of the two convex ring clamping blocks (121d).

6. The electric power assist assembly according to claim 5, characterized in that: The height of the circumferential clamping block (121a) is greater than the height of the convex ring clamping block (121d), and the heights of the circumferential clamping block (121a) and the convex ring clamping block (121d) are both 1 cm to 2 cm.

7. The electric power assist assembly according to claim 6, characterized in that: The width of the power-assisting motor (1) and the first ratchet (2) is a first width, the width of the second ratchet (3) and the sprocket wheel (7) is a second width, and the difference between the first width and the second width is less than 3 cm.

8. The electric power assist assembly according to claim 7, characterized in that: The first outer ring (22), the second outer ring (32) and the wheel hub (6) are integrally arranged.

9. The electric power assist assembly according to claim 8, characterized in that: The rotor (12) and the first inner ring (21) are both rotatably connected to the wheel shaft (4) via a first bearing (41), and the second inner ring (31) is rotatably connected to the wheel shaft (4) via a second bearing (42). The first bearing (41) and the second bearing (42) have the same specifications.

10. An electric power-assisted bicycle, characterized in that: The invention comprises the electric power assist component according to any one of claims 1 to 9.

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