Dual-power built-in motor of power-assisted bicycle

Abstract

A dual-power middle motor of a booster bicycle comprises a shell, a power mechanism, a gear transmission mechanism, a middle shaft and a chain wheel, the shell is provided with a through hole allowing the middle shaft to penetrate through, the power mechanism and the gear transmission mechanism are located in the shell, and the power mechanism drives the chain wheel to rotate through the gear transmission mechanism. The power mechanism is composed of a first driving module and a second driving module, the first driving module and the second driving module are arranged on the same side, the first driving module and the second driving module conduct torque output through meshing constraint, and the first driving module drives the gear transmission mechanism and then drives the chain wheel to rotate; according to the double-power bicycle, more labor can be saved during riding, the problem of increasing power in a limited space is solved by adopting a double-power driving mode, higher torque is output, the power requirement of riding is met, and the experience feeling of riding is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power-assisted bicycles, in particular to a power-assisted bicycle with a dual-power mid-mounted motor. Background Art

[0002] Bicycles are the most economical and convenient means of transportation for people and have been widely used by urban and rural residents. Bicycle structural technology includes many aspects, among which mechanical transmission technology is one of the most important factors. With the advancement of science and technology and the improvement of people's quality of life, people's requirements for traditional bicycles have also increased, resulting in the emergence of electric bicycles. Electric bicycles are usually equipped with battery-driven parts and human-driven parts. The human-driven part consists of pedals, cranks, chainrings and axles. People pedal to drive the cranks, which in turn drives the chainrings to rotate, and finally drives the rear wheel to rotate through the chain and flywheel to provide power and complete the entire transmission chain of the bicycle.

[0003] Due to the limitation of the frame structure, the driving motors used in existing electric bicycles are relatively small in power, resulting in insufficient output torque. When facing uphill or accelerating, the rider will have more effort, which affects the riding experience. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a dual-power mid-mounted motor for an assistive bicycle, which can effectively solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is: a dual-power mid-mounted motor for an assisted bicycle, including a shell, a power mechanism, a gear transmission mechanism, a central axis and a chainring, the shell is provided with a through hole for the central axis to pass through, the power mechanism and the gear transmission mechanism are located inside the shell, the power mechanism drives the chainring to rotate through the gear transmission mechanism, and is characterized in that the power mechanism consists of a first drive module and a second drive module, wherein the first drive module and the second drive module are arranged on the same side, and the first drive module and the second drive module output torque to each other through meshing constraints, and the first drive module drives the gear transmission mechanism to drive the chainring to rotate.

[0006] As a further preferred embodiment of the present utility model, the first driving module includes a first stator and a first rotating drum; the first stator is sleeved on the inner wall of the shell, and the first stator is located inside the first rotating drum; a plurality of groups of rotor coils are embedded in the inner wall of the first rotating drum, a first outer gear ring is embedded in the outer wall of the first rotating drum, and an output gear rod is provided in the middle of the first rotating drum; a bearing is provided at the end of the output gear rod and connected to the inner wall of the shell, and the middle part of the output gear rod is meshed and connected to the gear transmission mechanism.

[0007] As a further preferred embodiment of the present invention, the second driving module includes a second stator and a second rotating drum; the second stator is sleeved on the inner wall of the shell, and the second stator is located inside the second rotating drum, and a bearing is provided in the middle of the second rotating drum and connected to the inner wall of the second stator; a plurality of groups of rotor coils are embedded in the inner wall of the second rotating drum, and a second outer gear ring is embedded in the outer wall of the second rotating drum; the second outer gear ring is meshingly connected with the first outer gear ring.

[0008] As a further preferred solution of the present invention, the first outer gear ring and the second outer gear ring have the same specifications.

[0009] As a further preferred embodiment of the present invention, the gear transmission mechanism includes a first one-way bearing, a flange bracket and a transmission gear rod; the inner ring of the first one-way bearing is clamped with the transmission gear rod, and the outer ring of the first one-way bearing is provided with a transmission gear; the transmission gear is meshingly connected with the output gear rod; the end of the transmission gear rod is provided with a bearing connected to the inner wall of the housing; the flange bracket is provided with a bearing connected to the housing, and an external gear plate is provided on one side of the flange bracket located in the housing; the external gear plate is meshingly connected with the transmission gear rod.

[0010] As a further preferred solution of the utility model, the crankset is mounted on the outer wall of the flange bracket; the inner wall of the flange bracket is provided with a second one-way bearing connected to the central axis.

[0011] As a further preferred solution of the utility model, a wire unwinding bin and a control circuit board are further provided inside the shell; the control circuit board is electrically connected to the first drive module and the second drive module respectively through wires.

[0012] Compared with the prior art, the utility model provides a dual-power mid-mounted motor for a power-assisted bicycle, which has the following beneficial effects:

[0013] The utility model can make riding more labor-saving, adopts a dual-power drive mode to solve the problem of increasing power in a limited space, outputs higher torque, meets the power requirements of riding and improves the riding experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure section;

[0016] Figure 3 It is a schematic diagram of the internal structure section;

[0017] Figure 4 It is a schematic diagram of the power-assisted drive structure transmission;

[0018] Figure 5It is a schematic diagram of the human-driven structure transmission;

[0019] Figure 6 It is a schematic diagram of the internal structure section;

[0020] Among them: 1. Shell; 2. Power mechanism; 2-1. First drive module; 2-11. First stator; 2-12. First rotating drum; 2-13. First outer gear ring; 2-14. Output gear rod; 2-2. Second drive module; 2-21. Second stator; 2-22. Second rotating drum; 2-23. Second outer gear ring; 2-3. Rotor coil; 3. Gear transmission mechanism; 3-1. First one-way bearing; 3-11. Transmission gear; 3-2. Flange bracket; 3-21. External gear disc; 3-3. Transmission gear rod; 4. Middle shaft; 5. Tooth disc; 6. Second one-way bearing; 7. Bearing. DETAILED DESCRIPTION

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0023] In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0024] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0025] Reference Figure 1-6The utility model provides a dual-power mid-mounted motor for an assisted bicycle, comprising a shell 1, a power mechanism 2, a gear transmission mechanism 3, a middle shaft 4 and a chainring 5, wherein the shell 1 is provided with a through hole for the middle shaft 4 to pass through, the power mechanism 2 and the gear transmission mechanism 3 are located inside the shell 1, and the power mechanism 2 drives the chainring 5 to rotate through the gear transmission mechanism 3, and is characterized in that the power mechanism 2 is composed of a first drive module 2-1 and a second drive module 2-2, wherein the first drive module 2-1 and the second drive module 2-2 are arranged on the same side, and the first drive module 2-1 and the second drive module 2-2 output torque to each other through meshing constraints, and the output power of the first drive module 2-1 and the second drive module 2-2 is consistent, and the first drive module 2-1 drives the gear transmission mechanism 3 and then drives the chainring 5 to rotate.

[0026] As a further preferred embodiment of the present invention, the first driving module 2-1 includes a first stator 2-11 and a first rotating drum 2-12; the first stator 2-11 is sleeved on the inner wall of the shell 1, and the first stator 2-11 is located inside the first rotating drum 2-12; the inner wall of the first rotating drum 2-12 is inlaid with a plurality of groups of rotor coils 2-3, the outer wall of the first rotating drum 2-12 is inlaid with a first outer gear ring 2-13, and the middle part of the first rotating drum 2-12 is provided with an output gear rod 2-14; the end of the output gear rod 2-14 is provided with a bearing 7 connected to the inner wall of the shell 1, and the middle part of the output gear rod 2-14 is meshed and connected with the gear transmission mechanism 3.

[0027] As a further preferred embodiment of the present invention, the second driving module 2-2 includes a second stator 2-21 and a second rotating drum 2-22; the second stator 2-21 is sleeved on the inner wall of the shell 1, and the second stator 2-21 is located inside the second rotating drum 2-22, and a bearing 7 is provided in the middle of the second rotating drum 2-22 and connected to the inner wall of the second stator 2-21; a plurality of groups of rotor coils 2-3 are embedded in the inner wall of the second rotating drum 2-22, and a second outer gear ring 2-23 is embedded in the outer wall of the second rotating drum 2-22; the second outer gear ring 2-23 is meshingly connected with the first outer gear ring 2-13.

[0028] As a further preferred embodiment of the present invention, the first outer gear ring 2-13 and the second outer gear ring 2-23 have the same specifications.

[0029] As a further preferred embodiment of the present invention, the gear transmission mechanism 3 includes a first one-way bearing 3-1, a flange bracket 3-2 and a transmission gear rod 3-3; the inner ring of the first one-way bearing 3-1 is clamped with the transmission gear rod 3-3, and the outer ring of the first one-way bearing 3-1 is sleeved with a transmission gear 3-11; the transmission gear 3-11 is meshingly connected with the output gear rod 2-14; the end of the transmission gear rod 3-3 is provided with a bearing 7 connected to the inner wall of the housing 1; the flange bracket 3-2 is provided with a bearing 7 connected to the housing 1, and the side of the flange bracket 3-2 located in the housing 1 is provided with an external gear plate 3-21; the external gear plate 3-21 is meshingly connected with the transmission gear rod 3-3.

[0030] As a further preferred embodiment of the present invention, the crankset 5 is mounted on the outer wall of the flange bracket 3 - 2 ; the inner wall of the flange bracket 3 - 2 is provided with a second one-way bearing 6 connected to the central shaft 4 .

[0031] As a further preferred embodiment of the present invention, the middle axis 4 is a torque sensing middle axis with a built-in strain gauge. When riding, the greater the induced deformation of the strain gauge, the greater the pedaling force, and the smaller the deformation, the opposite is true. Signal transmission is performed to control the output power of the motor.

[0032] As a further preferred embodiment of the present invention, a wire unwinding bin and a control circuit board are further provided inside the housing 1; the control circuit board is electrically connected to the first drive module 2-1 and the second drive module 2-2 through wires.

[0033] As a specific embodiment of the present invention: Figure 1 , 5 When the rider rides, the middle shaft 4 drives the flange bracket 3-2 to rotate the chainring 5 through the action of the second one-way bearing 6. Due to the action of the first one-way bearing 3-1, the force will not continue to be transmitted to the rear gear transmission mechanism 3 and the power mechanism 2. When the rider actively exerts force, the transmission chain is reduced, making riding easier and more labor-saving.

[0034] Due to the rotation of the middle shaft 4 during riding, when the induced deformation of the strain gauge is greater, it means that the pedaling force is greater, and the smaller the deformation is, the opposite is true. According to the signal transmission, the power mechanism 2 is operated;

[0035] See also Figure 1 , 24. When the power mechanism 2 is working, the magnetic field changes of the first stator 2-11 and the second stator 2-21 are controlled by electric current, so that the first rotating cylinder 2-12 and the second rotating cylinder 2-22 can rotate. The first rotating cylinder 2-12 and the second rotating cylinder 2-2 are linked to each other through the constraint of the first outer gear ring 2-13 and the second outer gear ring 2-23, so that the output is consistent. The output gear rod 2-14 drives the transmission gear 3-11, and the force is transmitted to the transmission gear rod 3-3 under the action of the first one-way bearing 3-1, so that the flange bracket 3-2 rotates, and then provides power for the chainring 5, making riding more labor-saving. The dual-power drive method is adopted to solve the problem of increasing power in a limited space, output higher torque, meet the power requirements of riding and improve the riding experience.

[0036] As needed, the above-mentioned installation, setting, provision or connection methods include but are not limited to installation, setting or connection by screws, riveting, welding or socketing, fixing, etc., and the installation, setting or connection method is selected according to the needs of the working scenario.

[0037] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A dual-power mid-mounted motor for an assistive bicycle, comprising a housing (1), a power mechanism (2), a gear transmission mechanism (3), a middle shaft (4) and a chainring (5), wherein the housing (1) is provided with a through hole for the middle shaft (4) to pass through, the power mechanism (2) and the gear transmission mechanism (3) are located inside the housing (1), the power mechanism (2) drives the chainring (5) to rotate through the gear transmission mechanism (3), and is characterized in that: The power mechanism (2) is composed of a first drive module (2-1) and a second drive module (2-2), wherein the first drive module (2-1) and the second drive module (2-2) are arranged on the same side, and the first drive module (2-1) and the second drive module (2-2) output torque to each other through meshing constraints, and the first drive module (2-1) drives the gear transmission mechanism (3) to drive the toothed disc (5) to rotate.

2. The dual-power mid-mounted motor for power-assisted bicycle according to claim 1, characterized in that: The first driving module (2-1) comprises a first stator (2-11) and a first rotating drum (2-12); the first stator (2-11) is sleeved on the inner wall of the housing (1), and the first stator (2-11) is located inside the first rotating drum (2-12); a plurality of groups of rotor coils (2-3) are embedded in the inner wall of the first rotating drum (2-12), a first outer gear ring (2-13) is embedded in the outer wall of the first rotating drum (2-12), and an output gear rod (2-14) is provided in the middle of the first rotating drum (2-12); a bearing (7) is provided at the end of the output gear rod (2-14) and is connected to the inner wall of the housing (1), and the middle of the output gear rod (2-14) is meshedly connected to the gear transmission mechanism (3).

3. The dual-power mid-mounted motor for power-assisted bicycle according to claim 2, characterized in that: The second driving module (2-2) comprises a second stator (2-21) and a second rotating drum (2-22); the second stator (2-21) is sleeved on the inner wall of the shell (1), and the second stator (2-21) is located inside the second rotating drum (2-22); a bearing (7) is provided in the middle of the second rotating drum (2-22) and is connected to the inner wall of the second stator (2-21); a plurality of groups of rotor coils (2-3) are embedded in the inner wall of the second rotating drum (2-22), and a second outer gear ring (2-23) is embedded in the outer wall of the second rotating drum (2-22); the second outer gear ring (2-23) is meshingly connected with the first outer gear ring (2-13).

4. The dual-power mid-mounted motor for power-assisted bicycle according to claim 3, characterized in that: The first outer gear ring (2-13) and the second outer gear ring (2-23) have the same specifications.

5. The dual-power mid-mounted motor for power-assisted bicycle according to claim 2, characterized in that: The gear transmission mechanism (3) comprises a first one-way bearing (3-1), a flange bracket (3-2) and a transmission gear rod (3-3); the inner ring of the first one-way bearing (3-1) is clamped with the transmission gear rod (3-3), and the outer ring of the first one-way bearing (3-1) is provided with a transmission gear (3-11); the transmission gear (3-11) is meshedly connected with the output gear rod (2-14); the end of the transmission gear rod (3-3) is provided with a bearing (7) and connected with the inner wall of the housing (1); the flange bracket (3-2) is provided with a bearing (7) and connected with the housing (1), and the side of the flange bracket (3-2) located in the housing (1) is provided with an external gear plate (3-21); the external gear plate (3-21) is meshedly connected with the transmission gear rod (3-3).

6. The dual-power mid-mounted motor for the power-assisted bicycle according to claim 5, characterized in that: The toothed disc (5) is mounted on the outer wall of the flange bracket (3-2); the inner wall of the flange bracket (3-2) is provided with a second one-way bearing (6) connected to the central shaft (4).

7. The dual-power mid-mounted motor for power-assisted bicycle according to claim 1, characterized in that: A wire unwinding bin and a control circuit board are also provided inside the housing (1); the control circuit board is electrically connected to the first drive module (2-1) and the second drive module (2-2) respectively through wires.

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