WO2014161365A1 - 一种用于助力自行车上的电机 - Google Patents

一种用于助力自行车上的电机 Download PDF

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Publication number
WO2014161365A1
WO2014161365A1 PCT/CN2014/000344 CN2014000344W WO2014161365A1 WO 2014161365 A1 WO2014161365 A1 WO 2014161365A1 CN 2014000344 W CN2014000344 W CN 2014000344W WO 2014161365 A1 WO2014161365 A1 WO 2014161365A1
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Prior art keywords
motor
sun gear
hub
assisting
planetary
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PCT/CN2014/000344
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English (en)
French (fr)
Inventor
王海波
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宁波能威电机科技有限公司
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Publication of WO2014161365A1 publication Critical patent/WO2014161365A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/60—Rider propelled cycles with auxiliary electric motor power-driven at axle parts
    • B62M6/65—Rider propelled cycles with auxiliary electric motor power-driven at axle parts with axle and driving shaft arranged coaxially

Definitions

  • the invention relates to a motor for assisting a bicycle.
  • Electric assist bicycle structure of human-machine cooperation system of existing electric assist bicycle Complex involving many sophisticated sensors and electronic control systems at a high cost.
  • An integrated wheel for assisting a wheelchair consisting of a shaft, a motor, a drive controller, a planetary gear reducer, a battery case, a power battery pack, a battery equalizer, a hub, and a torque sensor, the motor Forming a geared motor with the planetary gear reducer, the geared motor being mounted in the hub a position of the heart; the shaft is an output shaft of the geared motor, and the shaft is inverted with the geared motor Loading the structure; the shaft is fixed with the frame of the power-assisted wheelchair, and the rotating power is reduced
  • the outer casing of the machine is fixed on the casing of the hub; the drive controller, the power battery pack, a battery case of the battery equalizer is fixed in the hub and rotates synchronously with the hub
  • the technical problem to be solved by the present invention is to overcome the above deficiencies of the prior art and provide a Safe and reliable, easy to operate, high detection accuracy, compact structure, stable operation for power The motor on the bicycle.
  • a main technical method for assisting a motor on a bicycle includes: a hub motor body, a central shaft disposed on the hub motor body, and mounting a planetary torque sensor in the body of the hub motor, the planetary torque sensor including an a sun gear mounted on the central shaft, a planetary gear set meshing with the sun gear And a ring gear meshing with the planetary gear set, one of the planetary gear set and the ring gear One component as a power input component and the other component as a power output component, the sun gear a limit mechanism for limiting the rotation of the sun gear to a certain angle, and a torque signal a mechanism, the torque signal mechanism mates with the sun gear.
  • the motor for assisting a bicycle provided by the present invention may also have the following auxiliary technologies. Expropriation:
  • the limiting mechanism includes a swinging rod connected to the sun gear, and the swinging rod is driven a reset spring and a limiting member for limiting the swing rod, wherein the swing rod is provided with a strip shape a hole, the limiting member is located in the strip hole.
  • the torque signal mechanism is coupled to the swing link.
  • a fine adjustment screw is disposed on both sides of the strip hole.
  • the planetary gear set includes a rotatable carrier and a row mounted on the carrier A star gear, the carrier is coupled to the flywheel.
  • the limiting mechanism includes an arcuate limiting slot disposed on the sun gear and located at the The limiting member in the limiting slot is connected to the sun gear.
  • the hub motor body includes a stator, a rotor, and the same mounted on the spindle A hub to which the rotor is coupled, the hub being coupled to the ring gear.
  • the carrier includes a frame body and a neck formed on the frame body, the neck portion extending The hub is coupled to the flywheel.
  • the hub is mounted to the spindle by a bearing.
  • the beneficial effects provided by the motor for assisting the bicycle provided by the invention are:
  • the invention has the advantages of safety, reliability, convenient operation, high detection precision, compact structure and stable operation. High reliability, simplifying the structure of the product and reducing the cost of production.
  • Figure 1 is a structural view of the present invention.
  • Figure 2 is an exploded structural view of the present invention.
  • Figure 3 is a cross-sectional view of the present invention.
  • Figure 4 is a structural view of the middle limit mechanism of the present invention.
  • Figure 5 is a front elevational view of the center stop mechanism of the present invention.
  • FIG. 6 is a working principle diagram of the present invention.
  • Figure 7 is a structural view of a swing lever of the present invention.
  • Figure 8 is a structural view of a second embodiment of the present invention.
  • Figure 9 is a structural view of a sun gear in a second embodiment of the present invention.
  • a motor for assisting a bicycle is provided.
  • An embodiment comprising a hub motor body 8 and a central shaft 1 disposed on the hub motor body 8 And a planetary torque sensor 9 mounted in the hub motor body 8, the planetary torque sensing
  • the gear 9 includes a sun gear 2 mounted on the central shaft 1 and meshed with the sun gear 2 a planetary gear set 3 and a ring gear 4 meshing with the planetary gear set 3 at the planetary gear set 3 and one of the ring gears 4 as a power input component and the other component as a power output a component, the sun gear 2 is further provided with a limit that limits the rotation of the sun gear 2 by a certain angle
  • the mechanism 5 further includes a torque signal mechanism 6 that is in phase with the sun gear 2 Cooperating, when the planetary gear set 3 is used as an input member, the ring gear 4 is used as a power output component
  • the planetary gear set 3 drives the ring gear 4 and the sun gear 2 to rotate, the limit The mechanism 5 limits the
  • the power input of the power input component is to assist the flywheel on the bicycle. It is possible to accurately sense the rider's riding state and control the hub motor according to the riding state.
  • the power output component is connected to the hub in the hub motor body 8 when However, the sun gear 2 is limited by the limiting mechanism 5, and only the oscillating motion can be performed.
  • the planetary gear set 3 The ring gear 4 is directly driven to move as a power transmission mechanism between the flywheel and the hub.
  • This invention The above structures are all installed inside the hub to form a built-in structure, which improves the work. Reliability and long life. At the same time, the above torque sensor detection is more sensitive.
  • the embodiment provided by the present invention is only for using the planetary gear set 3 as a power input member, the ring gear 4 As a detailed description of the working principle and structure of the power output component, the ring gear 4 is used as a power input.
  • the working principle and structure of the component and the planetary gear set 3 as the power output component are the same as those of the above embodiment. This is the same and will not be described here.
  • the above structure provided in accordance with the present invention wherein One of the planetary gear set 3 and the ring gear 4 can also be used as a swinging member through a limiting mechanism. Limit the position and cooperate with the torque signal mechanism.
  • the sun gear acts as a power input or Power output, another component that is not used as a swinging member as the corresponding power output or power transmission Into the part. That is, in the above aspect provided by the present invention, three rotating parts in the planetary gear mechanism Any one of the parts can be used as a swinging member for torque signal detection, and the other two components can be used. As a power transmission component between the flywheel and the hub. Therefore, these corresponding technical solutions
  • the structure and working principle are the same as the following embodiments, and the corresponding connection relationships can be interchanged.
  • the planetary gear set 3 includes a rotatable carrier 31 and a planet mounted on the carrier 31 A gear 32 is coupled to the flywheel on the booster bicycle. Said in the invention The planetary gear set 3 is rotatable so that it can be connected to the flywheel as a flywheel and hub
  • the moving mechanism uses the torque sensor as the power transmission component between the flywheel and the hub, which is better. The detection of the torque input by the flywheel enables accurate control of the hub motor.
  • the hub motor body 8 includes a stator 81, a rotor 82, and the rotor mounted on the spindle 82-connected hub 7, the hub 7 is connected to the ring gear 4, the carrier 31 comprises a frame a body 311 and a neck 312 formed on the frame 311, the neck 312 extending out of the hub 7 Connected to a flywheel on a booster bicycle, the hub 7 being mounted in the center by a bearing 71 On axis 1.
  • the flywheel on the bicycle will ride the user.
  • the torque in the process is transmitted to the carrier 31 in the planetary torque sensor.
  • the limiting mechanism 5 includes a swinging rod 51 connected to the sun gear 2 and restricting the swinging rod 51 a limiting member 53, the swinging rod 51 is provided with a shape-shaped hole 54, and the limiting member 53 is located at the In the strip hole 54.
  • the limiting member 53 is mounted on the fixing member on the hub 7 and has safety Reliable, easy to operate, high detection accuracy, compact structure, stable operation, high reliability
  • a motor for assisting a bicycle is provided.
  • the torque signal mechanism 6 is connected to the swing rod 51, and the side of the strip hole 54 is provided with a fine adjustment screw
  • the rod 55 adjusts the length of the strip hole 54 by the fine adjustment screw 55 provided on both sides of the strip hole 54.
  • the sun gear 2 is now adjustable in rotation angle.
  • the present invention also provides another embodiment for assisting power on a bicycle.
  • the limiting mechanism 5 includes an arcuate limiting slot 56 disposed on the sun gear 2, located at a limiting member 53 in the limiting groove 56 and a return spring 52 for driving the sun gear 2 to be reset,
  • the torque signal mechanism 6 is coupled to the sun gear 2.
  • the above embodiment is to limit the mechanism 5 It is disposed on the sun gear 2, and directly limits the rotation angle of the sun gear 2 through the limiting member 53, the force
  • the moment signal mechanism 6 collects the rotation angle of the sun gear 2 and converts the rotation angle. Knowing the torque input through the planetary gear set 3 simplifies the structure of the product and reduces production. cost.
  • the working principle of the invention is:
  • the assisted bicycle provided by the present invention needs to work on the hub motor body 8 during the traveling process.
  • it is necessary to output a large torque to the flywheel, and the torque is transmitted through the flywheel.
  • the carrier 31 delivers the main power of the generated active torque through the planetary gears 32.
  • the sun gear 2 and the ring gear 4 are allocated, and the sun gear 2 is mounted with a reset for driving the sun gear 2 to be reset.
  • the assist bicycle provides auxiliary power; when it is not required to output a large torque, it is applied to the carrier 31
  • the torque on the corresponding one is reduced, so that the limit mechanism that cooperates with the sun gear 2 swings in the opposite direction, and the torque
  • the signal mechanism 6 collects the swing angle information and outputs it to the control circuit, and the stator 81 and the rotor 82 do not work, so that The normal riding of the assisted bicycle provided by the invention or the use of inertial sliding, the greater the active torque, The larger the counter torque is, the larger the swing angle is, and the stronger the swing angle signal is.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
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Abstract

一种用于助力自行车上的电机，包括轮毂电机本体（8）、设置在所述轮毂电机本体上的中心轴（1）和安装在所述轮毂电机本体内的行星力矩传感器（9），所述行星力矩传感器包括安装在所述中心轴上的太阳齿轮（2）、与所述太阳齿轮相啮合的行星齿轮组（3）以及与所述行星齿轮组相啮合的齿圈（4），所述行星齿轮组和所述齿圈中的一个部件作为动力输入部件，另一部件作为动力输出部件，所述太阳齿轮还设置有限制所述太阳齿轮转动一定角度的限位机构（5）和力矩信号机构（6），所述力矩信号机构与所述太阳齿轮相配合。所述电机安全可靠、操作方便，检测精度高，结构紧凑、运行平稳、可靠性高，简化了产品的结构，降低了生产成本。

Description

一种用于助力自行车上的电机 技术领域
本发明涉及一种用于助力自行车上的电机。
背景技术
已有的电动助力自行车具有的人机协同系统的电动助力自行车结构 复杂，涉及许多精密的传感器和电控系统而成本高。如中国专利号 ZL201120112207.X的实用新型专利，公开日为2011年12月21日，公开了 一种助力轮椅的一体轮，由轴、电机、驱动控制器、行星齿轮减速器、 电池盒、动力电池组、电池均衡器、轮毂、力矩传感器组成，所述电机 与所述行星齿轮减速器组成减速电机，所述减速电机装在所述轮毂的中 心位置；所述轴为所述减速电机的输出轴，所述轴与所述减速电机为倒 装结构；所述轴与所述助力轮椅的车架固定不转动，旋转的所述减速电 机的外壳固定在所述轮毂的壳体上；装有所述驱动控制器、动力电池组、 电池均衡器的电池盒固定在所述轮毂内，并随所述轮毂同步转动；所述 力矩传感器装在所述轮毂外表面上。上述结构将力矩传感器安装在轮毂 外表面上使得其测量精度不是很高。
发明内容
本发明所要解决的技术问题在于克服上述现有技术之不足，提供一 种安全可靠、操作方便，检测精度高，结构紧凑、运行平稳的用于助力 自行车上的电机。
按照本发明提供的一种用于助力自行车上的电机采用的主要技术方 案为：包括轮毂电机本体、设置在所述轮毂电机本体上的中心轴和安装 在所述轮毂电机本体内的行星力矩传感器，所述行星力矩传感器包括安 装在所述中心轴上的太阳齿轮、与所述太阳齿轮相啮合的行星齿轮组以 及与所述行星齿轮组相啮合的齿圈，所述行星齿轮组和所述齿圈中的一 个部件作为动力输入部件，另一部件作为动力输出部件，所述太阳齿轮 还设置有限制所述太阳齿轮转动一定角度的限位机构，还包括力矩信号 机构，所述力矩信号机构与所述太阳齿轮相配合。
本发明提供的用于助力自行车上的电机还可具有如下附属技术特 征：
所述限位机构包括一与所述太阳齿轮相连接的摆杆、带动所述摆杆 复位的复位弹簧以及限制所述摆杆的限位件，所述摆杆上设置有一条形 孔，所述限位件位于所述条形孔中。
所述力矩信号机构与所述摆杆相连接。
所述条形孔的两侧设置有微调螺杆。
所述行星齿轮组包括可旋转的齿轮架以及安装在所述齿轮架上的行 星齿轮，所述齿轮架与飞轮相连接。
所述限位机构包括设置在所述太阳齿轮上的弧形限位槽以及位于所 述限位槽中的限位件，所述力矩信号机构与所述太阳齿轮相连接。
所述轮毂电机本体包括安装在所述主轴上的定子、转子以及与所述 转子相连接的轮毂，所述轮毂与所述齿圈相连接。
所述齿轮架包括架体以及形成在所述架体上的颈部，所述颈部伸出 所述轮毂与所述飞轮相连接。
所述轮毂通过一轴承安装在所述主轴上。
采用本发明提供的用于助力自行车上的电机带来的有益效果为：本 发明具有安全可靠、操作方便，检测精度高，结构紧凑、运行平稳、可 靠性高，简化了产品的结构，降低了生产成本的特点。
附图说明
图1为本发明的结构图。
图2为本发明的分解结构图。
图3为本发明的剖视图。
图4为本发明的中限位机构的结构图。
图5为本发明的中限位机构的主视图。
图6为本发明的工作原理图。
图7为本发明中摆杆的结构图。
图8为本发明的第二种实施例的结构图。
图9为本发明的第二种实施例中的太阳齿轮的结构图。
具体实施方式
下面结合附图对本发明做进一步的详述：
如图1至图7所示，按照本发明提供的一种用于助力自行车上的电机 的实施例，包括轮毂电机本体8、设置在所述轮毂电机本体8上的中心轴1 和安装在所述轮毂电机本体8内的行星力矩传感器9，所述行星力矩传感 器9包括安装在所述中心轴1上的太阳齿轮2、与所述太阳齿轮2相啮合的 行星齿轮组3以及与所述行星齿轮组3相啮合的齿圈4，在所述行星齿轮组 3和所述齿圈4中的一个部件作为动力输入部件，另一部件作为动力输出 部件，所述太阳齿轮2还设置有限制所述太阳齿轮2转动一定角度的限位 机构5，还包括力矩信号机构6，所述力矩信号机构6与所述太阳齿轮2相 配合，当所述行星齿轮组3作为输入部件，所述齿圈4作为动力输出部件 时，所述行星齿轮组3带动所述齿圈4和所述太阳齿轮2转动，所述的限位 机构5将所述太阳齿轮2的转动角度限定在一定范围内，使得太阳齿轮2只 能转动一定角度，通过力矩信号机构6采集太阳齿轮2的转动角度并且对 转动角度进行换算，便可得知通过所述行星齿轮组3输入的转矩大小。所 述轮毂电机本体8根据输入转矩大小作为工作信号，从而对助力自行车实 现助力控制。
在本实施例中，动力输入部件的动力输入为助力自行车上的飞轮， 能够准确的感知骑行者的骑行状态，根据骑行状态控制所述轮毂电机本 体8的工作。动力输出部件是与所述轮毂电机本体8中的轮毂相连接，当 然太阳齿轮2受到限位机构5的限制，只能做摆动运动，所述行星齿轮组3 直接驱动所述齿圈4运动，作为飞轮与轮毂之间的动力传动机构。本发明 中的上述结构均安装在轮毂内部，构成一种内藏式结构，提高了工作的 可靠性，延长使用寿命。同时，上述力矩传感器检测更加灵敏。
本发明提供的实施例仅对将行星齿轮组3作为动力输入部件、齿圈4 作为动力输出部件的工作原理及结构进行详细说明，齿圈4作为动力输入 部件、行星齿轮组3作为动力输出部件的工作原理及结构与上述实施例基 本相同，在这里不再赘述。当然，按照本发明提供的上述结构，其中的 行星齿轮组3与所述齿圈4中的一个也可以作为摆动件，通过限位机构进 行限位，并与力矩信号机构相配合，此时，太阳齿轮则作为动力输入或 动力输出，另外一个不作为摆动件的部件作为相应的动力输出或动力输 入部件。即在本发明提供的上述方案中，行星齿轮机构中的三个转动部 件中的任何一个均可以作为力矩信号检测的摆动件，其余两个部件则可 以作为飞轮与轮毂之间的动力传递部件。因此，这些相应的技术方案结 构与工作原理与下述各实施例相同，将相应连接关系互换即可。
参见图1至图7，按照本发明提供的用于助力自行车上的电机，所述 行星齿轮组3包括可旋转的齿轮架31以及安装在所述齿轮架31上的行星 齿轮32，所述齿轮架31与助力自行车上的飞轮相连接。本发明中的所述 行星齿轮组3是可以转动，从而能够与飞轮相连接，作为飞轮与轮毂的传 动机构，将力矩传感器作为飞轮与轮毂之间的动力传动部件，能够更好 的检测飞轮输入的力矩，实现对轮毂电机的准确控制。
参见图1至图7，按照本发明提供的用于助力自行车上的电机，所述 轮毂电机本体8包括安装在所述主轴上的定子81、转子82以及与所述转子 82相连接的轮毂7，所述轮毂7与所述齿圈4相连接，所述齿轮架31包括架 体311以及形成在所述架体311上的颈部312，所述颈部312伸出所述轮毂7 与助力自行车上的飞轮相连接，所述轮毂7通过一轴承71安装在所述中心 轴1上。当助力自行车在骑行过程中，自行车上的飞轮将使用者在骑行过 程中的转矩传递给行星力矩传感器中的齿轮架31。
参见图4和图5，按照本发明提供的用于助力自行车上的电机，所述 限位机构5包括一与所述太阳齿轮2相连接的摆杆51以及限制所述摆杆51 的限位件53，所述摆杆51上设置有一条形孔54，所述限位件53位于所述 条形孔54中。所述的限位件53安装在所述轮毂7上的固定件上，具有安全 可靠、操作方便，检测精度高，结构紧凑、运行平稳、可靠性高
参见图6和图7，按照本发明提供的用于助力自行车上的电机，所述 力矩信号机构6与所述摆杆51相连接，所述条形孔54的两侧设置有微调螺 杆55，通过设置在条形孔54两侧的微调螺杆55调节条形孔54的长度已实 现太阳齿轮2可转动角度的调节。
参见图8和图9，本发明还提供另一实施例的用于助力自行车上的电 机，所述限位机构5包括设置在所述太阳齿轮2上的弧形限位槽56、位于 所述限位槽56中的限位件53以及驱动所述太阳齿轮2复位的复位弹簧52， 所述力矩信号机构6与所述太阳齿轮2相连接。上述实施例是将限位机构5 设置在太阳齿轮2上，通过限位件53直接限制太阳齿轮2的转动角度，力 矩信号机构6采集太阳齿轮2的转动角度并且对转动角度进行换算，便可 得知通过行星齿轮组3输入的转矩大小，简化了产品的结构，降低了生产 成本。
本发明的工作原理为：
本发明提供的助力自行车在行进过程中，在需要轮毂电机本体8工作 时，例如上坡或加速时，就需要对飞轮输出较大转矩，转矩通过飞轮传 递给齿轮架31，齿轮架31通过行星齿轮32将生成的主动转矩的主动力分 配给太阳齿轮2和齿圈4，在太阳齿轮2上安装有驱动太阳齿轮2复位的复 位弹簧，当产生在太阳齿轮2上的转矩大于复位弹簧产生的反转矩时，太 阳齿轮2连同与之固连的摆杆51便会摆动至复位弹簧上的反转矩与太阳 齿轮2上的转矩相等时，力矩信号机构6即时采集到摆杆51的摆角信息， 并且将采集到的摆角信息传递给助力自行车上的控制电路，控制电路对 轮毂电机本体8通电，通电时，定子81与转子82转动带动轮毂7转动，为 助力自行车提供辅助动力；当不需要输出较大转矩时，施加在齿轮架31 上的转矩相应减小，使得与太阳齿轮2相配合的限位机构反向摆动，力矩 信号机构6采集摆角信息输出至控制电路，定子81和转子82不工作，使得 本发明提供的助力自行车的正常骑行或利用惯性滑行，主动转矩愈大， 反转矩就愈大，摆动角度因此而愈大，摆动角度信号因此而愈强。

Claims (9)

  1. 一种用于助力自行车上的电机，包括轮毂电机本体、设置在所述 轮毂电机本体上的中心轴和安装在所述轮毂电机本体内的行星力矩传感 器，其特征在于：所述行星力矩传感器包括安装在所述中心轴上的太阳 齿轮、与所述太阳齿轮相啮合的行星齿轮组以及与所述行星齿轮组相啮 合的齿圈，所述行星齿轮组和所述齿圈中的一个部件作为动力输入部件， 另一部件作为动力输出部件，所述太阳齿轮还设置有限制所述太阳齿轮 转动一定角度的限位机构，还包括力矩信号机构，所述力矩信号机构与 所述太阳齿轮相配合。
  2. 如权利要求1所述的用于助力自行车上的电机，其特征在于：所 述限位机构包括一与所述太阳齿轮相连接的摆杆、带动所述摆杆复位的 复位弹簧以及限制所述摆杆的限位件，所述摆杆上设置有一条形孔，所 述限位件位于所述条形孔中。
  3. 如权利要求2所述的用于助力自行车上的电机，其特征在于：所 述力矩信号机构与所述摆杆相连接。
  4. 如权利要求2所述的用于助力自行车上的电机，其特征在于：所 述条形孔的两侧设置有微调螺杆。
  5. 如权利要求1所述的用于助力自行车上的电机，其特征在于：所 述行星齿轮组包括可旋转的齿轮架以及安装在所述齿轮架上的行星齿 轮，所述齿轮架与飞轮相连接。
  6. 如权利要求1所述的用于助力自行车上的电机，其特征在于：所 述限位机构包括设置在所述太阳齿轮上的弧形限位槽以及位于所述限位 槽中的限位件，所述力矩信号机构与所述太阳齿轮相连接。
  7. 如权利要求1所述的用于助力自行车上的电机，其特征在于：所 述轮毂电机本体包括安装在所述主轴上的定子、转子以及与所述转子相 连接的轮毂，所述轮毂与所述齿圈相连接。
  8. 如权利要求5所述的用于助力自行车上的电机，其特征在于：所 述齿轮架包括架体以及形成在所述架体上的颈部，所述颈部伸出所述轮 毂与所述飞轮相连接。
  9. 如权利要求7所述的用于助力自行车上的电机，其特征在于：所 述轮毂通过一轴承安装在所述主轴上。
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