The invention relates to an electric bicycle wheel hub motor with a built-in boost sensor, which includes a main shaft, wherein the main shaft is provided with a step platform, the main shaft is provided with a bearing sleeve, the bearing sleeve is provided with a square inner hole matching the shape of the step platform, the outer side of the bearing sleeve is supported on the end cover through an end cover support bearing, the inner side of the bearing sleeve is supported on the step platform, and the vertical side of the step platform The surface is provided with an elastomer support groove, on which an elastomer is lapped to form a simply supported beam structure, the inner side of the elastomer is fixedly connected with a strain gauge, the side wall groove of the square inner hole of the bearing sleeve is inserted with a force transmitting gasket, and the simply supported beam structure, the strain gauge and the force transmitting gasket of the elastic body of the bearing sleeve are combined to form a simply supported beam type force measuring mechanism. Beneficial effect: the elastic body of the invention does not participate in the hub support, the reliability of the elastic body is significantly improved, and the elastic body is fixed and does not rotate relative to the motor shaft, and the wireless transmitting module and receiving module without torque signal are not required, which not only saves space but also saves cost.
【技术实现步骤摘要】
内置助力传感器的电动自行车轮毂电机
本专利技术属于电机领域,尤其涉及一种内置助力传感器的电动自行车轮毂电机。
技术介绍
目前,电动自行车助力控制方式有两种,一种是通过速度传感器测量骑行者脚踏速度,根据速度大致估算助力功率的方式,另一种是通过力矩传感器测量骑行者脚踏力,根据脚踏力的大小精确计算助力功率的方式。上述两种助力方式,助力传感器安装位置位于五通中轴部,将中轴的转速信号或中轴所受力矩信号传给电机控制器,以控制电机输出功率,从而实现助力。两种助力方式各有优缺点,速度型助力方式的优点是结构简单、耐冲击能力强、成本低、安装方便,缺点是助力效果差;力矩型助力方式的优点是助力效果好,缺点是结构复杂、耐冲击能力弱、成本高、安装麻烦。力矩传感器虽然存在诸多缺点,但是它在助力效果上的优异表现,中高端电动自行车普遍采用力矩传感器。为了减少力矩传感器安装方面的麻烦,有些公司推出内置力矩传感器的轮毂电机,如专利文献公开号CN107054542A公开了一种“带力矩传感功能的轮毂电机和采用该电机的电动自行车”。上述结构中,弹性体一端与飞轮固接,另一端与电机轮毂固接,弹性体充当轮毂支撑件,骑行中轮毂的冲击直接加载到弹性体上,而且弹性体又不能做的太粗,做的结实一点的话形变量过小,满足不了应变输出要求,因此可靠性差。而且弹性体随轮毂旋转,因此还需要力矩信号无线发送模块及接收模块,体积大、结构复杂、成本高,综合性能不佳。能够设计出既能内置于轮毂电机中,助力效果佳,且体积小、结构简单、成本低、可靠性高的助力传感器是业内所盼的产品。
技术实现思路
本专利技术的目的在于克服上述技术的不足,而提供 ...
【技术保护点】
1.一种内置助力传感器的电动自行车轮毂电机,包括端盖、外壳、定子和主轴,其特征是:所述主轴上设有阶梯台,阶梯台横截面形状呈方形,所述主轴上套装有轴承套,所述轴承套设有与阶梯台形状匹配的方形内孔,所述轴承套外侧通过端盖支撑轴承支撑在端盖上,轴承套内侧支撑在阶梯台上,所述阶梯台垂直侧面设有弹性体支撑凹槽,弹性体支撑凹槽上搭接有弹性体,构成简支梁结构,所述弹性体内侧固接有应变片,轴承套方形内孔侧壁凹槽内插接有传力垫片,轴承套套装弹性体的简支梁结构、应变片和传力垫片共同构成简支梁式力测量机构。
【技术特征摘要】
1.一种内置助力传感器的电动自行车轮毂电机,包括端盖、外壳、定子和主轴,其特征是:所述主轴上设有阶梯台,阶梯台横截面形状呈方形,所述主轴上套装有轴承套,所述轴承套设有与阶梯台形状匹配的方形内孔,所述轴承套外侧通过端盖支撑轴承支撑在端盖上,轴承套内侧支撑在阶梯台上,所述阶梯台垂直侧面设有弹性体支撑凹槽,弹性体支撑凹槽上搭接有弹性体,构成简支梁结构,所述弹性体内侧固接有应变片,轴承套方形内孔侧壁凹槽内插接有传力垫片,轴承套套装弹性体的简支梁结构、应变片和传力垫片共同构成简支梁式力测量机构。2.根据权利要求1所述的内置助力传感器的电动自行车轮毂电机,其特征是:所述轴承套内侧支撑在阶梯台上下表面的若干轴承套垂直方向...
【专利技术属性】
技术研发人员:严振华,
申请(专利权)人:天津迪思科博科技发展有限公司,
类型:发明
国别省市:天津,12
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