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Built-in motor and electric power-assisted bicycle

A mid-mounted motor and casing technology, which is applied to bicycles, motor vehicles, motorcycles, etc., can solve the problems of high-efficiency motor platform, low strength of nylon teeth, and low efficiency of working conditions, etc., and achieve compact structure and large load-carrying capacity , the effect of increasing the torque

Pending Publication Date: 2020-10-30
YADEA TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the first-stage reduction gears of traditional motors used in power-assisted bicycles mostly use parallel teeth and nylon teeth, resulting in low efficiency in working conditions, low efficiency platform of the motor, large cogging torque, small torque, and low temperature rise. High, poor reliability and low strength of nylon teeth

Method used

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  • Built-in motor and electric power-assisted bicycle
  • Built-in motor and electric power-assisted bicycle
  • Built-in motor and electric power-assisted bicycle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as Figure 1-Figure 6 As shown, the central motor includes a casing 1, a stator 2, a rotor assembly 3, a sun gear 4, a planetary gear assembly 5, a transmission assembly 6, a clutch assembly 7 and a central shaft 8, wherein the stator 2 is fixedly connected to the casing 1; The rotor assembly 3 is coaxial and rotatably arranged inside the stator 2; the sun gear 4 is fixedly passed through the rotor assembly 3 and is rotatably connected with the casing 1; The planetary gear 52 and the planet carrier 53 connected with the double planetary gear 52, the inner ring gear 51 is fixedly connected with the casing 1, the double planetary gear 52 meshes with the sun gear 4, the planet carrier 53 is rotationally connected with the sun gear 4 and is connected with the double gear The joint planetary gear 5 is fixedly connected; the transmission assembly 6 includes a pulley 61 and a synchronous belt 62 that is in transmission connection with the pulley 61, and the pulley 61 is i...

Embodiment 2

[0072] The difference between this embodiment and Embodiment 1 is that, if Figure 10 and 11 As shown, the outer circumference of the first inner ring 64 is also provided with a plurality of semi-arc grooves 642 at intervals, the first arc-shaped grooves 641 and the semi-arc-shaped grooves 642 are alternately arranged, and when the first roller 65 When 641 rolls inside, the semi-arc groove 642 can cooperate with the inner wall of the pulley 61 to ensure the free rolling of the first roller 65, which can improve the transmission efficiency of the transmission assembly 6 and ensure silent operation.

[0073] In this embodiment, a baffle 67 is used in the transmission assembly 6 instead of the first bearing 66, and the two ends of the first roller 65 in the axial direction respectively abut against the limit step of the pulley 61 and the baffle 67, and pass through the baffle. 67 can limit the first roller 65 in the axial direction of the first inner wheel 64 and prevent the fir...

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Abstract

The invention discloses a built-in motor and an electric power-assisted bicycle, and relates to the field of electric bicycles. The built-in motor comprises a case, a stator, a rotor assembly, a sun gear, a planetary gear assembly, a transmission assembly, a clutch assembly and a middle shaft, wherein the stator is fixedly connected with the casing; the rotor is coaxially and rotatably arranged inthe stator; the sun gear fixedly penetrates through the rotor assembly and is rotationally connected with the case. The planetary gear assembly comprises an inner gear ring, duplex planetary gears meshed with the inner gear ring and a planetary carrier connected with the duplex planetary gears, the inner gear ring is fixedly connected with the case, the duplex planetary gears are meshed with thesun gear, and the planetary carrier is rotationally connected with the sun gear and fixedly connected with the duplex planetary gears; the transmission assembly comprises a belt wheel and a synchronous belt in transmission connection with the belt wheel, and the belt wheel is in transmission connection with the planet carrier; the clutch assembly is in transmission connection with the synchronousbelt; the middle shaft extends in the axial direction of the sun gear and is connected with the clutch assembly. By adopting the planetary gear assembly, the torque of the motor can be improved whilethe rotating speed of the motor is reduced.

Description

technical field [0001] The invention relates to the field of electric bicycles, in particular to a central motor and an electric power-assisted bicycle. Background technique [0002] As an auxiliary means of transportation, the power-assisted bicycle is equipped with a motor and has a power assist system, which can realize the integration of human riding and motor-assisted power. At present, power-assisted bicycles have increasingly become an important means of transportation for people to travel, and the power-assisted bicycle motor is particularly important as the main power source in the power-assisted device. In the prior art, the first-stage reduction gears of traditional motors used in power-assisted bicycles mostly use parallel teeth and nylon teeth, resulting in low efficiency in working conditions, low efficiency platform of the motor, large cogging torque, small torque, and low temperature rise. High, poor reliability and low strength of nylon teeth. Contents of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B62M11/14B62M6/40B62M7/02
CPCB62M11/14B62M6/40B62M7/02
Inventor 陈正平高超薛荣生白雷
Owner YADEA TECH GRP CO LTD