201102540 六、發明說明： 【發明所屬之技術領域】 [0001]本發明涉及一種超栽保護裝置，尤其渉及—種馬遠超載 保護裝置。 ~ 【先前技術】 [_ g達作為-雜動裝置，被廣泛之應用於各㈣力装纟 . 中。為了保護馬達不會因為超載而發生損壞…般會在 馬達上設置-個超栽保護裝置。傳統之超載保護裝篆藉 由複雜之機械結構和檢測電路與馬達相連接，用以在檢 0 測到馬達超載之時候分離所述馬達與傳動結構從而保護 馬達。然而傳統之馬達超載保護裝置之結構複雜，造價 昂貴，不利於廣泛之使用。 【發明内容】 [0003] 有鑒於此，有必要提供一種結構簡單、成本低廉之馬達 超載保護裝置。 . ； :.... .- [0004] 一種馬達超載保護裝置，其包括馬達、傳動軸、負載輪 及傳動機構。所述負載輪可轉動地連接在所述傳動軸之 y 一端。所述傳動轴之另一端與所述馬達相喷合。所述傳 動轴距離負載輪較近之侧壁上形成有一驅動柄。所述驅 動柄遠離所述傳動軸之末端形成有一連接桿。所述負載 輪包括一與所述傳動軸相對之内侧面。所述内側面上對 應所述連接桿位置沿傳動轴之轴向方向延伸一個凸台。 所述凸台正對所述傳動轴之一側開設有一貫穿該側之缺 口，該缺口位於所述連接桿之運動軌跡上。所述傳動機 構包括兩個彈片及一個連接該兩個彈片之彈性元件。該 098122871 表單編號A0101 第4頁/共13頁 〇98203891〇-〇 201102540 [0005] Ο [0006] [0007] 〇 [0008] 098122871 兩個彈片可轉動地支撑所述連接桿之兩端。所述彈片連 接有彈性元件之—_持在料缺口内，以在馬達之帶 動下驅使所述負載輪隨所述傳動輛_起轉動。當所述馬 達之實際輸出功率對所述彈片所產生之力矩大於所述兩 個彈片平行時’所述彈性元件之拉伸力對所述彈片所產 生之力矩時，所述傳動機構脫離所述缺口而使所述傳動 軸呈空轉狀態。 相較現有技術，所述馬達超載保護裝置藉由設置傳動轴 、傳動機構與負載輪之間之連動關係來對驅動馬達進行 超載保護，不需要複雜之機械結構及檢測馬達功率之電 路’降低了所述馬達超栽保護裝置之成本β 【實施方式】 下面將結合附圖對本發明作一具體介紹。 請一併參閱圖1與圖2，本發明實施方式提供之馬達超載 保護裝置100，其包括馬達1〇、傳動軸2〇、負載輪3〇及 傳動機構40。 所述傳動轴20包括傳動端22、與所述傳動端22相對之嚙 合端24及分別垂直連接所述傳動端22和嚙合端24之側壁 23。所述負載輪30藉由其對稱中心處可轉動地連接在所 述傳動軸20之傳動端22上。所述馬達10與所述傳動轴2〇 之嚙合端24相嚙合以驅動所述傳動軸2〇轉動《所述傳動 軸20鄰近所述負載輪30 —端之侧壁23上形成有一驅動柄 222。所述驅動柄222沿所述傳動軸20之徑向向外延伸而 成並垂直於傳動軸2〇之轴線。本實施方式中，所述驅動 柄222遠離所述傳動轴2〇之末端形成有一連接桿2222 ’ 表單編號Α0101 第5頁/共13頁 0982038910-0 201102540 所述連接杯2222平行於所述傳動轴20。 [0009] [0010] [0011] 098122871 所述負載輪30包括一與所述傳動軸2〇相對之内側面32。 所述内側面3 2對應所述連接桿2 2 2 2位置沿傳動軸2 0之軸 向延伸出一凸台34。本實施方式中，所述凸台34與所述 負載輪30 —體成形。所述凸台34正對所述傳動軸20之一 侧.開設有一缺口 342 ’該缺口 342貫穿所述凸台34相對之 兩侧並位於所述連接桿2222之運動軌跡上◊該缺口 342沿 所述負載輪30之轴向方向上之寬度略大於所述驅動柄222 之連接桿2222沿該方向之長度。所述連接桿2222收容在 所述缺口 342内。 所述傳動機構40包括兩個彈片41及一彈性元件。所述兩 個彈片41藉由該彈性元件42連接在一起。本實施方式中 ，所述彈性元件為一彈簧42，且該彈簧42在自然狀態下 之長度小於所述驅動柄222之連接桿2222之長度。實際應 用中，所述彈性疋件42也可為具有彈性之橡膠、矽膠等 材料做成。所述兩個彈片41束中心處附近分別可轉動地 支撐在所述連接桿2222之兩碱，且彈簧42之兩端分別連 接在所述兩個彈片41鄰近一端部之位置。本實施方式中 ，由於所述彈簧42之自然狀態之長度小於所述連接桿 2222之長度，從而使兩個彈片41與彈簧42之間共同形成 一個楔形之彈性結構。 組裝時，首先將組裝好之楔形之彈性結構狀之傳動機構 40插入至所述缺口 342内，所述連接桿2222位於所述缺 口 342内，此時，所述彈片41裝設有彈簧42之一端及連接 所述連接桿2222之部分穿置在所述缺口 342内，而遠離所 表單編號A0101 第6頁/共13頁 201102540 述彈簧42之一端外側抵持在所述缺口 342外。最後將所述 馬達10與所述傳動軸20之嚙合端24相嚙合。 [0012] Ο [0013] Ο [0014] 請一併參閱圖1與圖3。使用時，當馬達10之負載小於馬 達10之額定輸出功率時，由於楔形之彈性結構狀之傳動 機構40之彈片41遠離所述彈簧42之一端外側抵持在所述 缺口 342外’以在馬達1〇之帶動下驅使所述負載輪3〇隨所 述傳動轴20 —起轉動。如果馬達10之負載過大，導致馬 達10之實際輪出功率增大而超過了其額定輸出功率時， 所述馬達10之實際輸出功率對所述彈片41所產生之力矩 大於所述兩個彈片41平行時，所述弹簧42之拉伸力對所 述彈片41所產生之力矩時，所述傳動機構4〇之彈片41相 對負載輪30發生滑動，從而脫離所述缺口 342，此時所述 傳動軸2 0呈空轉狀態，以防止所述馬達1 〇超載。 所述馬達超載保護裝置藉由設置傳動轴、傳動機構與負 載輪之間之連動關係來對驅動馬達進行超載保護，不需 要複雜之機械結構及檢測馬達功率之電路，降低了所述 馬達超載保護裝置之成本。 綜上所述，本發明符合發明專利要件，爰依法提出專利 申請。惟，以上所述者僅為本發明之較佳實施方式，本 發明之範圍並不以上述實施方式為限，舉凡熟悉本案技 藝之人士援依本發明之精神所作之等效修飾或變化皆 應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1是本發明實施方式提供之一種馬達超載保護裝置之立 體示意圖； 098122871 表單編號Α0101 第7頁/共13頁 0982038910-0 [0015] 201102540 [0016] [0017] [0018] 圖2是圖1中II部分之放大圖； 圖3是圖1中之馬達超載保護裝置進行超載保護時之狀態 示意圖。 【主要元件符號說明】 馬達超載保護 100 馬達 10 裝置 傳動軸 20 傳動端 22 侧壁 23 驅動柄 222 負載輪 30 内側面 32 4 凸台 34 傳動機構 40 彈片 41 彈性元件 42 連接桿 2222 磁ϋ 342 嚙合端 24 098122871 表單編號Α0101 第8頁/共13頁201102540 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to an over-plant protection device, in particular, a horse-horse overload protection device. ~ [Prior Art] [_ g Da as a - dynamism device, is widely used in each (four) force assembly 纟. In order to protect the motor from damage due to overloading, a super-protection device will be installed on the motor. The conventional overload protection device is connected to the motor by a complicated mechanical structure and detection circuit for separating the motor and the transmission structure to protect the motor when the motor is detected to be overloaded. However, the conventional motor overload protection device has a complicated structure and is expensive to manufacture, which is disadvantageous for a wide range of uses. SUMMARY OF THE INVENTION [0003] In view of the above, it is necessary to provide a motor overload protection device that is simple in structure and low in cost. . . . . - [0004] A motor overload protection device comprising a motor, a drive shaft, a load wheel and a transmission mechanism. The load wheel is rotatably coupled to one end of the drive shaft y. The other end of the drive shaft is sprayed with the motor. A drive handle is formed on a side wall of the drive shaft that is closer to the load wheel. The drive handle is formed with a connecting rod away from the end of the drive shaft. The load wheel includes an inner side opposite the drive shaft. The inner side surface extends a boss along the axial direction of the transmission shaft corresponding to the position of the connecting rod. The boss is open to a side of the drive shaft with a gap extending through the side, and the notch is located on a movement track of the connecting rod. The transmission mechanism includes two elastic pieces and one elastic element connecting the two elastic pieces. The 098122871 Form No. A0101 Page 4 of 13 〇98203891〇-〇 201102540 [0005] 0006 [0006] [0008] 098122871 Two elastic pieces rotatably support both ends of the connecting rod. The shrapnel is coupled to the resilient member and held within the notch to drive the load wheel to rotate with the drive. The transmission mechanism is disengaged when the actual output power of the motor is greater than the moment generated by the elastic piece when the two elastic pieces are parallel when the tensile force of the elastic element is generated by the elastic element The gap causes the drive shaft to be idling. Compared with the prior art, the motor overload protection device overloads the drive motor by setting a linkage relationship between the transmission shaft, the transmission mechanism and the load wheel, and the circuit that does not require complicated mechanical structure and detects the power of the motor is reduced. The cost of the motor over-protection device β [Embodiment] The present invention will be specifically described below with reference to the accompanying drawings. Referring to FIG. 1 and FIG. 2 together, a motor overload protection device 100 according to an embodiment of the present invention includes a motor 1〇, a drive shaft 2〇, a load wheel 3〇, and a transmission mechanism 40. The drive shaft 20 includes a drive end 22, an engagement end 24 opposite the drive end 22, and side walls 23 that are vertically coupled to the drive end 22 and the engagement end 24, respectively. The load wheel 30 is rotatably coupled to the drive end 22 of the drive shaft 20 by its center of symmetry. The motor 10 is engaged with the meshing end 24 of the drive shaft 2 to drive the drive shaft 2 to rotate. A drive handle 222 is formed on the side wall 23 of the drive shaft 20 adjacent to the end of the load wheel 30. . The drive handle 222 extends radially outwardly of the drive shaft 20 and is perpendicular to the axis of the drive shaft 2''. In this embodiment, the driving handle 222 is formed with a connecting rod 2222 at the end of the driving shaft 2〇. Form No. 1010101 Page 5 / Total 13 pages 0982038910-0 201102540 The connecting cup 2222 is parallel to the driving shaft 20. [0011] [0011] 098122871 The load wheel 30 includes an inner side 32 opposite the drive shaft 2〇. The inner side surface 32 extends a boss 34 along the axis of the transmission shaft 20 corresponding to the position of the connecting rod 2 2 2 2 . In the present embodiment, the boss 34 is integrally formed with the load wheel 30. The boss 34 is opposite to one side of the drive shaft 20. A notch 342 is formed. The notch 342 extends through the opposite sides of the boss 34 and is located on the movement track of the connecting rod 2222. The width of the load wheel 30 in the axial direction is slightly larger than the length of the connecting rod 2222 of the drive handle 222 in this direction. The connecting rod 2222 is received in the notch 342. The transmission mechanism 40 includes two elastic pieces 41 and an elastic element. The two elastic pieces 41 are joined together by the elastic member 42. In this embodiment, the elastic member is a spring 42, and the length of the spring 42 in the natural state is smaller than the length of the connecting rod 2222 of the driving handle 222. In practical applications, the elastic member 42 may also be made of elastic rubber, silicone or the like. Two bases of the connecting rod 2222 are rotatably supported in the vicinity of the center of the two elastic pieces 41, and two ends of the spring 42 are respectively connected to the positions of the two elastic pieces 41 adjacent to one end. In this embodiment, since the length of the natural state of the spring 42 is smaller than the length of the connecting rod 2222, the two elastic pieces 41 and the spring 42 together form a wedge-shaped elastic structure. When assembling, the assembled wedge-shaped elastic structure transmission mechanism 40 is first inserted into the notch 342, and the connecting rod 2222 is located in the notch 342. At this time, the elastic piece 41 is provided with the spring 42. One end and a portion connecting the connecting rod 2222 are placed in the notch 342 away from the outside of the notch 342 from the outer side of one end of the spring 42 away from the form number A0101, page 6 of 13201102540. Finally, the motor 10 is meshed with the engagement end 24 of the drive shaft 20. [0012] Please refer to FIG. 1 and FIG. 3 together. In use, when the load of the motor 10 is less than the rated output power of the motor 10, the spring 41 of the transmission mechanism 40 of the wedge-shaped elastic structure is abutted outside the one end of the spring 42 to the outside of the notch 342 to be in the motor. The lower drive drives the load wheel 3 to rotate with the drive shaft 20. If the actual load of the motor 10 increases and exceeds its rated output power, the actual output power of the motor 10 generates a greater moment to the spring 41 than the two springs 41. When parallel, when the tensile force of the spring 42 is against the moment generated by the elastic piece 41, the elastic piece 41 of the transmission mechanism 4 slides relative to the load wheel 30, thereby being separated from the notch 342, and the transmission is The shaft 20 is in an idling state to prevent the motor 1 〇 from being overloaded. The motor overload protection device overload protects the drive motor by setting a linkage relationship between the transmission shaft, the transmission mechanism and the load wheel, and does not require a complicated mechanical structure and a circuit for detecting motor power, thereby reducing the overload protection of the motor. The cost of the device. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention should be It is covered by the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a motor overload protection device according to an embodiment of the present invention; 098122871 Form No. 1010101 Page 7 / Total 13 Page 0982038910-0 [0015] 201102540 [0016] [0017] 2 is an enlarged view of a portion II of FIG. 1. FIG. 3 is a schematic view showing a state in which the motor overload protection device of FIG. 1 is subjected to overload protection. [Main component symbol description] Motor overload protection 100 Motor 10 Device drive shaft 20 Drive end 22 Side wall 23 Drive handle 222 Load wheel 30 Inner side 32 4 Boss 34 Transmission 40 Spring 41 Elastic element 42 Connecting rod 2222 Magnetic ϋ 342 Engage End 24 098122871 Form Number Α0101 Page 8 of 13
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