五、新型說明： 【新型所屬之技術領域】 本創作與電動自行車有關，特別是有關於—種電動自 行車之踏力感測機構。 【先前技術】 中國公開第ΗΠ279630料利案揭露出一種「配備傳 器的自行車部件和⑽_各該部件雜料元」，其在曲 柄轴之左右兩端分別設置-應變規，用以量測曲柄轴在受 到扭力作用時所產生的扭曲變形量。 然而在此專利案中’雖然兩應變規的相對角位置及相 對轴向位置均可進行調整，但是主要是採取量測曲柄轴之 曲變U的方式’不同於本案所採取量測曲柄轴之曲 變形量的方式。 【新型内容】 本:ij作之主要目的在於提供一種電動自行車之踏力感 '機構’、此藉由：S：測曲柄軸之彎曲變形量而準確地推算 出曲柄軸所受踏力的大小。 背 為達成上述目的，本創作之踏力感測機構包含有—曲 柄轴一曲柄、一鏈輪，以及二應變規，其中，該兩曲柄 設=該曲祕之兩Lx供4板安裝而可受踏力的作 用帶動該曲柄㈣動；該鏈輪具有—純及—鏈條，該齒 盤套設固定於其令一該曲柄而可隨該曲柄轉動，該鏈條設 ㈠齒盤而可又該齒盤帶動；該兩應變規貼^於該曲柄轴 、並且相隔一預定角度，藉此，當該曲柄軸受到踏 該鏈條之張力的合力作用時會產生料變形，該兩應 ，、斤X置的位置可準確地量測到該曲柄軸的彎曲應變 里，進而推算itj該叫軸所受_踏力大小。 A在本料之實御彳巾，該兩應變規的位置可依據踏力 對《•亥曲柄轴所產生的作用力方向、_條之張力對該曲柄 軸所產生的作用力方向，或者前述兩個作用力的合力方向 而呈現90度或18〇度的設置。 【實施方式】 雄配口圖式列舉以下較佳實施例，用以對本創作之結 構及功效進行詳細說明。 °月先參閱第~圖，為本創作第-較佳實施例之電動自 行車之踏力感測機㈣，包含有-曲柄軸2〇、二曲柄3〇、 一鍵輪40、一應變;^ 輯50，52、一放大電路板6〇，以及一 應變傳感器70。 兩曲柄3〇連接於曲柄轴20之兩端，分別供一踏板14 安裝而可受踏力的作用而帶動曲柄軸3()於—五通管以内 轉動。各曲柄30所受到的踏力f對曲柄軸如會產生一第 一作用力Fi ’如第二圖所示。 鍵輪40具有一產般72 皿42及一鏈條44 ’齒盤42套設固 疋於其中曲柄3〇而可隨著曲柄轉動鏈條44設於齒 盤42而可隨著_ 42轉動。當各曲柄3G受到踏力作用 M419100 時’鏈條44之張力T將對曲柄軸2〇產生一第二作用力ρ *且，第-作用力F,與第二作用力F2會對曲柄軸2〇產^ 一合力F3，如第二圖所示。 兩應變規5〇,52均為單轴向應變規，係貼設於曲柄輪 20之中央，並且相隔一預定角度，用以量測曲柄軸2〇之 f曲應變量而產生-應變訊號。在本實施射，兩應變規 50 ’ 52是呈現180度的對稱設置，而且兩應變規5〇，^ 的位置會通過第一作用力R與第二作用力f2之合力& * 方向，如第二圖所示。 3 放大電路板60設於曲柄軸2〇且與兩應變規5〇，^V. New description: [New technical field] This creation is related to electric bicycles, especially regarding the electric force sensing mechanism of electric bicycles. [Prior Art] The Chinese publicly disclosed No. 279630 material case reveals a "bicycle component equipped with a transmitter and (10)_ each component of the component", which is respectively provided with a strain gauge on the left and right ends of the crankshaft for measuring The amount of distortion that the crankshaft produces when subjected to a torsional force. However, in this patent case, although the relative angular position and relative axial position of the two strain gauges can be adjusted, the method of measuring the crankshaft U of the crankshaft is mainly different from the measurement crankshaft taken in this case. The way the amount of curvature changes. [New content] This: The main purpose of ij is to provide a treading force 'mechanism' for an electric bicycle. This is: S: The amount of bending force of the crankshaft is accurately estimated by measuring the amount of bending deformation of the crankshaft. In order to achieve the above objectives, the pedaling sensing mechanism of the present invention comprises a crankshaft-crank, a sprocket, and two strain gauges, wherein the two cranks are set to have two Lx of the song for 4 panels to be installed. The action of the pedaling force drives the crank (four); the sprocket has a - pure and - chain, the sprocket is sleeved and fixed to the crank to rotate with the crank, the chain is provided with a (1) toothed disc and the toothed disc Driving; the two strain gauges are attached to the crank shaft and spaced apart by a predetermined angle, whereby when the crank shaft is subjected to the combined force of the tension of the chain, material deformation occurs, and the two should be set. The position can accurately measure the bending strain of the crankshaft, and then calculate the magnitude of the pedaling force that itj is called. A. In the actual material of the material, the position of the two strain gauges can be based on the direction of the force generated by the shaft of the shaft, the direction of the force generated by the tension on the crankshaft, or the foregoing two The force of the resultant force direction is set at 90 degrees or 18 degrees. [Embodiment] The following preferred embodiments are listed for the purpose of explaining the structure and function of the present invention in detail. Referring to the first to the first, the electric bicycle pedaling sensor (four) according to the first preferred embodiment of the present invention includes a crankshaft shaft 2, a crankshaft 3 jaw, a key wheel 40, and a strain; 50, 52, an amplifying circuit board 6A, and a strain sensor 70. The two cranks 3 are connected to the two ends of the crankshaft 20, and are respectively mounted by a pedal 14 to be driven by the pedaling force to drive the crankshaft 3 () to rotate inside the five-way pipe. The pedaling force f received by each of the cranks 30 produces a first force Fi' for the crankshaft as shown in the second figure. The key wheel 40 has a 72-plate 42 and a chain 44'. The sprocket 42 is sleeved in the crank 3 thereof and is rotatable with the crank 42 as the crank rotates the chain 44 to the yoke 42. When each crank 3G is subjected to the pedaling force M419100, the tension T of the chain 44 will generate a second force ρ* for the crankshaft 2〇, and the first force F and the second force F2 will produce the crankshaft 2 ^ A force F3, as shown in the second figure. The two strain gauges 5, 52 are uniaxial strain gauges which are attached to the center of the crank wheel 20 and spaced apart by a predetermined angle for measuring the strain of the crankshaft 2 to generate a strain signal. In this embodiment, the two strain gauges 50' 52 are symmetrically arranged at 180 degrees, and the positions of the two strain gauges 5〇, ^ are passed through the resultant force & * direction of the first force R and the second force f2, such as The second picture shows. 3 The amplifier board 60 is set on the crankshaft 2〇 and with two strain gauges, 〇, ^
作電性連接’用以放大兩應變規6〇所產生之應變信藏 將放大後的應變信號傳送出去。 W 應變傳感器7〇可為旋轉變壓器或導電滑環，在此並不 加以限定’由於兩者皆為習知結構，容不再資述其動作: 理。應變傳感器70套設於曲柄軸3〇且與兩應變規5〇，” • 及放大電路板60作電性連接，用以供電給兩應變規5〇， 52及放大電路板6G，並且將放大電路板6〇所放大的應❺ 信號傳送出去。 經由上述結構可知，當曲柄軸2〇受到合力F3的作用 而產生彎曲變形時’應變規5〇可量測到曲柄軸2〇之拉伸 應變量’應變規52可量測到曲柄車由2〇之壓縮應變量，如 f-圖所如此便會產生電阻㈣差異而錢變訊號產 此時即可根據此應變信餘算丨曲柄轴2㈣受到的踏 J此外，由於兩應變規50，52均為單軸向應變規且 5 0t、曲柄軸2G之轴向相互平行之應變方向，當曲柄軸 党到扭力作用而扭曲變形時，兩應變規50，52也會同 从產生扭曲㈣’但是因為兩應變規，52與 的轡形古A τ ° ’所以在此情況下不會產生應變訊號。 另一方面’兩應變規50, 52的位置可有不同的變化， =圖所示’兩應變規5〇,52之間呈現⑽度的對稱設 ί㈣各曲柄3G位於同—假想平面上，當曲柄軸2〇產生 1變規：變規50可量測到曲柄軸20之拉伸應變量， :規5。，51 =到曲柄軸20之壓縮應變量;再者，兩應 第一 ’、11呈現9G度的設置’如第四及五圖所示， 乍用力F,的方向會通過應變規5〇的位置 二2 =則是會通過應變規52的位置，藉此，Ϊ曲柄 量測到曲柄軸20U伸可 鮎9 Π W成㈧ & 1㈣& 5 2 "Γ量測到曲柄 軸20之編變量’如此同樣會產生電 ： 變訊號產生，以推算出曲柄軸2G所受到的靖力大小有-综上所陳，本_之踏力制機構 ^ _:央之兩應變規5〇，_則曲柄二= 二、=Γ柄Γ所受到的作用力而設置在9:度 或180度的位置，不僅安裝方便，與習用 又 更能提升量騎果卿確性。 〜構相比之下’ 本創作於前揭實施例中所揭露的 說明，並_來_本案之，其^件’僅為舉例 變化，亦應為本案之巾請專利範圍所涵蓋飞件的替代或 M419100 【圖式簡單說明】 第一圖為本創作第一較佳實施例之俯視剖面圖。 第二圖為第一圖之端視圖。 第三圖為本創作第二較佳實施例之俯視剖面圖。 第四圖為本創作第三較佳實施例之俯視剖面圖。 第五圖為第四圖之端視圖。 【主要元件符號說明】The electrical connection is used to amplify the strained strain generated by the two strain gauges, and the amplified strain signal is transmitted. The W strain sensor 7〇 can be a resolver or a conductive slip ring, which is not limited herein. Since both are conventional structures, the operation is no longer described. The strain sensor 70 is sleeved on the crankshaft 3〇 and electrically connected to the two strain gauges 5", and the amplifying circuit board 60 for supplying power to the two strain gauges 5, 52 and the amplifying circuit board 6G, and will be enlarged The signal transmitted by the circuit board 6〇 is transmitted. According to the above structure, when the crankshaft 2〇 is subjected to the resultant force F3 to cause bending deformation, the strain gauge 5〇 can measure the tensile strain of the crankshaft 2〇. The quantity 'strain gauge 52 can measure the compression strain of the crankshaft by 2〇, such as the f-map, it will produce the resistance (four) difference and the money change signal can be calculated according to the strain signal. The crankshaft 2 (4) In addition, because the two strain gauges 50, 52 are uniaxial strain gauges and the axial direction of the crankshaft 2G is parallel to each other, when the crankshaft is twisted and deformed by the torsion, the two strains Gauge 50, 52 will also produce distortion (4) 'but because of the two strain gauges, 52 and the shape of the ancient A τ ° ' so no strain signal will be generated in this case. On the other hand 'the position of the two strain gauges 50, 52 There can be different changes, = the two strains shown in the figure 5〇, 52 presents a symmetricity of (10) degrees. (4) Each crank 3G is located on the same-imaginary plane. When the crankshaft 2〇 produces 1 change: the gauge 50 can measure the tensile strain of the crankshaft 20, : Rule 5, 51 = the compression strain to the crankshaft 20; in addition, the two should be the first ', 11 shows the setting of 9G degree', as shown in the fourth and fifth figures, the direction of the force F, will pass the strain gauge The position of 5〇2 = 2 is the position of the strain gauge 52, whereby the crankshaft measures the crankshaft 20U extension 鲇9 Π W into (eight) & 1 (four) & 5 2 " Γ measured crankshaft The 20-variable variable 'this will also generate electricity: the variable signal is generated to calculate the magnitude of the Jingli force that the crankshaft 2G is subjected to. In summary, the _the pedaling mechanism ^ _: the two strain gauges of the central axis 5〇 , _ then crank 2 = 2, = the force of the handle is set at 9: degrees or 180 degrees, not only easy to install, and the use of the more can improve the accuracy of riding the fruit. The following description of the invention disclosed in the previous disclosure, and _ to _ the case, its ^ 'only for example changes, should also be the case for the case please The replacement of the flying parts covered by the scope or the M419100 [Simplified description of the drawings] The first drawing is a top sectional view of the first preferred embodiment of the creation. The second drawing is the end view of the first drawing. 2 is a top cross-sectional view of a third preferred embodiment of the present invention. The fifth drawing is an end view of the fourth embodiment. [Main component symbol description]
踏力感測機構10 五通管12 踏板14 曲柄轴20 曲柄30 踏力F 第一作用力Fi 鏈輪40 齒盤42 鏈條44 張力T 第二作用力f2 合力f3 應變規50，52 放大電路板60 應變傳感器70Stepping force sensing mechanism 10 five-way pipe 12 pedal 14 crankshaft 20 crank 30 pedaling force F first force Fi sprocket 40 toothed disk 42 chain 44 tension T second force f2 resultant force f3 strain gauge 50, 52 amplifier board 60 strain Sensor 70