M315K2 八、新型說明： 【新型所屬之技術領域】 本創作是有關於一種起重機的起升機構，且特別是有 關於一種雙40英叹岸邊集裝箱起重機兩捲筒差動式起升 機構（Lifting machinery of two reel differential type for two 40 feet container shore crane ) ° 【先前技術】 隨著集裝箱運輸的快速發展，運輸船舶趨向大型化和 ® 尚速化，從而要求碼頭配置能適合快速發展的船舶運輸行 業的需求，設置具有更高效率的岸邊集裝箱起重機。 目前現有技術起重機的主起升機構只具有負責一個 吊具的起升和下降工作，因此一次只能吊一個40英呎的集 裝箱、或2個20英呎的集裝箱，不僅生產效率受到限制， 並且不能滿足市場的需求。 【新型内容】 本創作的目的在於提供雙40英呎岸邊集裝箱起重機 # 兩捲筒差動式起升機構，它能使一套馬達和滅速器的起升 機構一次可以吊起2個40或45英呎箱（或4個20英呎集 裳箱），並且不僅能實現雙吊具的同步作業和單吊具作業， 同時能提高60%以上裝卸效率，從而能適應日趨發展的船 身白運輸行業對裝卸效率的需求。 本創作的目的是這樣實現的： 一種雙40英呎岸邊集裝箱起重機兩捲筒差動式起升 機構，包括：馬達、與馬達連接的減速器及其高速制動器、 没置在滅速器輸出端的捲简、與捲兔連接的捲筒制動哭· 其特徵在於： 所述的馬達至少設置一個； 所述的連接在馬達輸出端的減速器採用的是一行星 差動減速器，該行星差動減速器具有高速輸入軸、低速輸 出軸和控制動力分配的差動出軸；所述的馬達輪出轴與行 生差動減速為而速輸入軸連接’在行星差動減速器高速輸 入轴上至少設置一個高速制動器； 所述的捲筒設置為一陸侧捲筒和一海侧捲筒，兩個捲 筒分別連接在行星差動減速器的兩低速輸出軸上；在各捲 筒上至少設置一個捲筒制動器； 還包括： 、， &制行生差動減速器動力分配的差動轴制動器，該 差動軸制動器連接設置在行星差動減速器的差動出軸上。 在上述的雙40英呎岸邊集裝箱起重機兩捲筒差動式 I升機構中，所述的陸側捲筒和海侧捲筒分別是具有四根 出繩的四出繩捲筒；其中， 所述的陸侧四出繩捲筒連接在行星差動滅速器的陸 側低速輸出轴上，該陸側四出繩捲筒的四 連接一個 吊具； < 所述的海侧四出繩捲筒連接在行星差動滅速器海侧 低速輸出軸上，該海侧四出繩捲筒的四根出换另外一 個吊具。 ' 在上述的雙40英呎岸邊集裝箱起重機兩捲筒差動式 7 戶斤述的馬達設置為兩個，即第一馬達 起升機構中，其中 和弟一馬達； ^與行星差動減速器的一高速輸入 第-馬達的輸速器的高速輸人軸上設置兩個高 軸連接，在該行星差動滅 速制動器； 第二馬達的輸出端與行星差動減速器的另—高速輪 入軸連接；在該行星差動滅速器的高速輸入軸上設置兩個 高速制動器。 在上述的雙40英呎岸邊集裝箱起重機兩捲筒差動式 起升機構中，其中，所述的馬達設置為一個馬達，該馬達 的輸出端與行星差動減速器的一高速輸入軸連接；在該行 星差動減速器的高速輸入軸上設置兩個高速制動器。 在上述的雙40英呎岸邊集裝箱起重機兩捲筒差動式 J : : ΐ.中所’所述的陸側四出繩捲筒上設置兩個捲 在:述:雔：侧四出，筒上設置兩個捲筒制動器。 起升機二二=邊，^ 星差動減速器的動力分 =_動轉有兩個控制行 轴制動器’兩差動“動是動5制動器和第二差動 器的兩差動出軸上。D°刀別連接设置在行星差動減速 升集裝箱起重機兩捲筒差動式起 比，具有以下的優點和積極=案’使之與現有技術相 本劍作由於‘用具有兩側輸出的行星差動減速器 ]V[315 替代現有技術的減速器，即用一套馬達和減速器連接兩套 起升機構，通過行星差動減速器將動力按實際外載扭矩自 動分配至各捲筒上，從而可實現雙吊具的同步作業，即一 次吊起2個40或45英呎箱（或4個20英呎集裝箱），使 岸邊集裝箱起重機的裝卸效率提高60%以上； 2·本創作由於採用一行星差動減速器和設置在行星 差動減速器差動出轴上的兩個差動軸制動器，通過兩差動 軸制動器對差動出軸的控制，可以實現雙吊具同步作業或 參單吊具工作的狀態以滿足裝卸的需求；如， 若將所有的差動軸制動器制動、所有的捲筒制動器打 開，動力按實際外載扭矩自動分配至各捲筒上，從而實現 雙吊具的同步作業； 若將一個差動軸制動器制動且另一個差動軸制動器 打開，被制動的差動轴制動器限制行星差動減速器相應差 動出軸的轉動，扭矩就傳遞到相應一侧的捲筒上，而被打 開的差動出軸由於不受約束，扭矩就傳遞不到另一側的捲 φ 筒，由此可實現單吊具作業； 3·本創作由於採用一套行星差動減速器驅動兩套起 升機構，不僅減少馬達、驅動器（減速器）等設備，使之 結構簡單重量輕，並且維修簡單。 為讓本創作之上述和其他目的、特徵和優點能更明顯 易懂，下文特舉較佳實施例，並配合所附圖式，作詳細說 明如下。 9 Μ3157α2 【實施方式】 請爹見圖1和圖2所示，它們是本創作雙4〇英吸岸 邊集裝箱起重機兩捲筒差動式起升機構的結構示意圖。本 創作起升機構包括：馬達10、與馬達1〇連接的減速器2〇、 設置在減速器20輸入端的高速制動器u、連接在減速器 20輸出端的捲筒30、設置在捲筒3〇上的捲筒制動器4〇、 以及連接在減速器20上的控制減速器2〇動力分配的差動 轴制動器50。 馨馬達10可根據馬達功率的情況設置一個馬達或兩個 馬達，本創作中，設置在馬達10輸出端的減速器2〇採用 的疋一行生差動減速為，该行星差動減速器2〇具有高速輸 入轴、低速輸出軸和控制動力分配的差動出軸；馬達1〇 輸出軸與行星差動減速器20的高速輸入軸連接，在行星差 動減速器20的高速輸入軸上至少設置一個高速制動器 11 ;捲筒30設置為兩個，即一陸側捲筒31和一海側捲筒 32,兩個捲筒31和32分別連接在行星差動減速器2〇的兩 φ 低速輸出軸21和22 ;每一捲筒30上至少設置一個捲筒制 動器40;差動轴制動器50用以控制行星差動減速器2〇的 動力分配’為了達到分別對陸側吊具和海侧吊具的控制， 差動軸制動器50具有第一差動軸制動器51和第二差動車由 制動器52,兩差動轴制動器51和52分別連接在行星差動 減速器20的兩個行星輪系的差動出軸上；通過兩差動軸制 動為51和52控制行星差動滅速器20兩行星輪系的差動出 軸的轉動，既可以控制陸侧的捲筒和海側的捲筒的同時轉 10M315K2 VIII. New description: [New technical field] The creation is related to a lifting mechanism of a crane, and in particular to a double-cylinder differential hoisting mechanism for a double 40 sigh shore container crane (Lifting) Machinery of two reel differential type for two 40 feet container shore crane ° ° [Previous technology] With the rapid development of container transportation, the transportation ship tends to be larger and faster, which requires the dock configuration to be suitable for the rapid development of the ship transportation industry. The need to set up more efficient shore container cranes. At present, the main hoisting mechanism of the prior art crane only has the lifting and lowering work of one spreader, so that only one 40-inch container or two 20-inch containers can be hoisted at a time, which is not only limited in production efficiency, but also Can not meet the needs of the market. [New content] The purpose of this creation is to provide a double 40 inch shore container crane # two reel differential hoisting mechanism, which can make a lifting mechanism of a motor and a speed extinguisher hoist two at a time 40 Or 45-inch boxes (or 4 20-inch sets of flats), and not only can achieve the double spreader synchronization and single spreader operation, but also improve the loading and unloading efficiency of more than 60%, so as to adapt to the growing hull The demand for handling efficiency in the white transportation industry. The purpose of this creation is to achieve this: A dual 40-inch shore container crane two-roll differential hoisting mechanism, including: motor, gear unit connected to the motor and its high-speed brake, not placed in the output of the speed reducer The winding of the end, the reel brake connected to the reel, is characterized by: at least one of the motors is arranged; the decelerator connected to the output end of the motor is a planetary differential reducer, the planetary differential The reducer has a high-speed input shaft, a low-speed output shaft and a differential output shaft for controlling power distribution; the motor wheel output shaft and the line differential deceleration are connected to the speed input shaft 'on the high-speed input shaft of the planetary differential reducer Providing at least one high speed brake; the reel is provided as a land side reel and a sea side reel, and the two reels are respectively connected to the two low speed output shafts of the planetary differential speed reducer; at least on each reel Providing a reel brake; further comprising: , , & a differential shaft brake for power distribution of the differential gearbox, the differential axle brake is connected to the differential of the planetary differential reducer Axis. In the above-mentioned dual 40-inch shore container crane two-roll differential I-liter mechanism, the land-side reel and the sea-side reel are respectively four-rope reels having four outgoing ropes; The land side four-rope reel is connected to the land side low-speed output shaft of the planetary differential destroyer, and the four sides of the land side four-rope reel are connected to one sling; < The rope reel is connected to the low-speed output shaft on the sea side of the planetary differential destroyer, and the four of the four-rope reels of the sea side are exchanged for another spreader. 'In the above-mentioned double 40-inch shore container crane, two reel differential type 7 kg described the motor is set to two, that is, the first motor hoisting mechanism, which is the brother of a motor; ^ differential deceleration with the planet The high-speed input shaft of the high-speed input of the first motor is provided with two high-axis connections on the planetary differential deceleration brake; the output end of the second motor and the planetary differential reducer are further high-speed Wheeled shaft connection; two high speed brakes are placed on the high speed input shaft of the planetary differential speeder. In the above-mentioned dual 40 inch shore container crane two-roll differential hoisting mechanism, wherein the motor is provided as a motor, and the output end of the motor is connected with a high speed input shaft of the planetary differential speed reducer. Two high-speed brakes are provided on the high-speed input shaft of the planetary differential reducer. In the above-mentioned double 40-inch shore container crane two reel differential type J: : ΐ. 中中' described on the land side four-rope reel set two rolls in: Description: 雔: side four out, Two reel brakes are placed on the barrel. Lifting machine 22 = side, ^ power differential of the differential gear reducer = _ movement has two control line brakes 'two differential' movement is the two differential output shaft of the 5 brake and the second differential The D° knife is connected to the two-cylinder differential type of the planetary differential deceleration container crane, which has the following advantages and positive = case 'making it with the prior art because of the use of the output with both sides Planetary differential reducer]V[315 replaces the prior art reducer, that is, a set of motors and reducers are used to connect two sets of hoisting mechanisms, and the power is automatically distributed to the reels according to the actual external load torque by the planetary differential reducer. Therefore, the synchronous operation of the double spreader can be realized, that is, two 40 or 45 inch boxes (or four 20 inch containers) can be lifted at one time, so that the loading and unloading efficiency of the shore container crane can be increased by more than 60%; Due to the use of a planetary differential reducer and two differential axle brakes arranged on the differential output shaft of the planetary differential reducer, the double spreader can be synchronized by controlling the differential output shaft by two differential axle brakes. The status of the work or the reference spreader is full If the differential shaft brake is braked and all the drum brakes are opened, the power is automatically distributed to each drum according to the actual external load torque, so that the double spreader can be synchronized; The differential axle brake is braked and the other differential axle brake is opened. The braked differential axle brake limits the rotation of the corresponding differential output shaft of the planetary differential reducer, and the torque is transmitted to the corresponding side of the reel and is opened. Since the differential output shaft is unconstrained, the torque is transmitted to the other side of the coil φ cylinder, thereby enabling single spreader operation. 3. This creation uses two sets of planetary differential reducers to drive two sets of lifts. The mechanism not only reduces the motor, the driver (reducer) and the like, makes the structure simple and light, and the maintenance is simple. In order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand, the following is a better implementation. For example, in conjunction with the drawings, a detailed description will be given below. 9 Μ3157α2 [Embodiment] Please refer to Fig. 1 and Fig. 2 for the creation of the double 4 inch British suction shore container. Schematic diagram of the two-roller differential hoisting mechanism of the machine. The hoisting mechanism of the present invention comprises: a motor 10, a speed reducer 2〇 connected to the motor 1〇, a high-speed brake u disposed at the input end of the speed reducer 20, and a connection to the speed reducer a reel 30 at the output end, a reel brake 4〇 disposed on the reel 3〇, and a differential shaft brake 50 for controlling the power transmission of the speed reducer 2 connected to the speed reducer 20. The motor 10 can be based on the motor power In the case of the case, one motor or two motors are provided. In the present creation, the speed reducer 2 设置 provided at the output end of the motor 10 is decelerated by a line, and the planetary differential speed reducer 2 has a high speed input shaft and a low speed output shaft. And a differential output shaft for controlling the power distribution; the motor 1〇 output shaft is connected to the high speed input shaft of the planetary differential speed reducer 20, and at least one high speed brake 11 is disposed on the high speed input shaft of the planetary differential speed reducer 20; the reel 30 It is provided as two, that is, a land side reel 31 and a sea side reel 32, and two reels 31 and 32 are respectively connected to the two φ low-speed output shafts 21 and 22 of the planetary differential speed reducer 2〇; At least 30 a reel brake 40; the differential shaft brake 50 is used to control the power distribution of the planetary differential reducer 2'. In order to achieve the control of the land side spreader and the sea side spreader, the differential shaft brake 50 has the first difference. The moving shaft brake 51 and the second differential vehicle are braked 52, and the two differential shaft brakes 51 and 52 are respectively connected to the differential output shafts of the two planetary gear trains of the planetary differential speed reducer 20; 51 and 52 control the rotation of the differential output shaft of the two planetary gear trains of the planetary differential speed extinguisher 20, and can control the simultaneous rotation of the land side reel and the sea side reel 10
從而使之達到既可以同時竭分別獨立轉動’ 請參見…所示^吊側吊具的獨立控制。 捲筒差動式起升機構第一 兩個 馬達的起重機起升機構_ f/、有巾1 口 機構由M °本創倾重機起升 器叫差動轴制^ 在^貫施例中，馬達1G設置為兩個，即第—馬達U 和弟馬達12。設置在馬達K)輸出端的行星差動減速器 具有兩個高速輸人轴23與24、兩個低速輸出軸21與 22以及兩個控制動力分配的差動出軸。 在所述的彳Τΐ·差動減速器20的兩個高速輸人軸23與 %中，一高速輸入幸由23與第一馬達u的輸出轴連接，在 該行f差動減速器20的高速輸入軸23上設置有兩個高速 制動益111與112 ;另一高速輸入軸24與第二馬達12的So that it can be independently rotated at the same time. See the ... independent control of the hanging side spreader. The lifting and lowering mechanism of the first two motors of the drum differential hoisting mechanism _ f/, the one-piece mechanism of the towel is made of the M ° Benz Tapping machine, and the differential shaft system is called the differential shaft system. The motor 1G is set to two, that is, the first motor U and the second motor 12. The planetary differential speed reducer provided at the output of the motor K) has two high speed input shafts 23 and 24, two low speed output shafts 21 and 22, and two differential output shafts for controlling power distribution. In the two high-speed input shafts 23 and % of the 彳Τΐ· differential speed reducer 20, a high-speed input is fortunately connected to the output shaft of the first motor u, and the differential gear 20 of the differential motor 20 is Two high speed brake levers 111 and 112 are disposed on the high speed input shaft 23; the other high speed input shaft 24 and the second motor 12
輸出端連接，在該行星差動減速器20的高速輸入軸24上 設置兩個有高速制動器121與122。 所述的行星差動減速器20的低速輸出軸用以驅動四 出繩捲筒的轉動；在本實施例中，行星差動減速器2〇的有 兩個低速輸出軸21與22，連接在陸侧低速輸出軸21上的 是一陸側四出繩捲筒31，該陸侧四出繩捲筒31的四根出 繩311、312、313、314連接一個吊具；連接在海側低速輸 出軸22上的是一海側四出繩捲筒32，該海側四出繩捲筒 M315,7^2 32的四根出繩321、322、323、324連接另外一個吊具； 兩個四出繩捲筒31和32通過行星差動減速器20低速輸出 轴的轉動而隨之轉動。在上述的各四出繩捲筒30上分別設 置了控制四出繩捲筒30轉動的捲筒制動器40，為了實現 陸側、海侧的兩個吊具的應急制動和由兩個吊具同時起 升、下降轉換為一個吊具起升、下降時使用，在本創作中， 四出繩捲筒30上分別設置兩個捲筒制動器40，即，在陸 側的四出繩捲筒31上設置了兩個捲筒制動器41和42 ;在 鲁海侧的四出繩捲筒32也設置兩個捲筒制動器43和44。 設置在行星差動減速器20的差動出軸上的差動軸制 動器50是用以控制行星差動減速器20的動力分配，在本 創作中，差動轴制動器50具有兩個差動軸制動器，即第一 行星機構差動軸制動器51和第二行星機構差動轴制動器 52，兩差動軸制動器51與52分別連接設置在行星差動減 速器20的兩差動出軸上，以此控制陸側、海侧的四出繩捲 筒30的工作狀態；其中，第一行星機構差動軸制動器51 φ 與行星差動減速器20中的一差動軸連接，該差動軸用以控 制（陸侧或海侧中）任一侧的四出繩捲筒31 ;第二行星機 構差動軸制動器52與行星差動減速器20中的另一差動轴 連接，該差動軸用以控制另一侧的四出繩捲筒32。 上述控制行星差動減速器的差動軸制動器制50的控 制原理是： 若兩差動軸制動器51和52全部動，所有高速軸制動 器11和捲筒制動器40打開，動力自動按外載扭矩分配到 M31^2 相應海侧捲筒、陸侧捲筒； 若兩行星機構差動軸制動器51和52中一個差動軸制 動器打開、另一個差動軸制動器制動，則動力集中傳遞給 捲筒制動器打開的捲筒，此時另一侧的捲筒制動器閉合的 捲筒沒有獲得馬達的扭矩； 反之，若兩個差動軸制動器的制動和打開調換，則動 力集中傳遞給另一侧已打開使捲筒制動器的捲筒，而相對 另一侧的捲筒制動器閉合的捲筒制動沒有獲得馬達的扭 • 矩。 請結合圖1參見圖2所示，圖2是本創作雙40英呎 岸邊集裝箱起重機兩捲筒差動式起升機構第二實施例具有 一個馬達的起重機起升機構的結構示意圖。在本實施例 中，起重機起升機構由馬達10、減速器20、四出繩捲筒 30、捲筒制動器40和差動轴制動器50組成。 本實施例與第一實施例不同的是，當馬達10的功率 足夠大時，可以設置一個馬達11 ;此時馬達11的輸出軸 φ 與行星差動減速器20的一高速輸入軸23連接，在該行星 差動減速器20的高速輸入轴23上設置兩個高速制動器 m 、 112 。 請參見圖1和圖2所示，本創作是如何實現雙吊具既 可以同步作業又可以使任何一侧的單吊具作業。 本創作中的差動軸制動器51和52通過控制行星差動 減速器20兩行星輪系的差動出軸的轉動，以控制陸側的捲 筒、海側的捲筒的同時轉動，也可控制陸側的捲筒、海側 13 M315702 的捲筒分別獨立轉動，達到同時實現陸側吊具和海側吊具 的同步控制，也可達到分別對陸側吊具和海側吊具的控制。 當需要雙吊具同時作業時： 差動軸制動器51和52全部制動、所有高速軸制動器 111、112和捲筒制動器40打開，馬達11的功率通過行星 差動減速器20低速輸出軸同時輸出至捲筒31、32，從而 實現起重機可同時吊起雙40 (或45)英呎箱、或者一個 40 (或45)英呎箱加2個20英呎箱、或者4個20英呎箱 • 作業； 當需要單側吊具作業時： 差動軸制動器51和52中一個制動器打開、另一個制 動器制動，則動力集中傳遞給捲筒制動器打開的捲筒，此 時另一侧的捲筒制動器閉合的捲筒沒有獲得馬達的扭矩。 綜上所述，本創作由於採用具有海陸兩侧輸出的行星 差動減速器，即用一套馬達和減速器連接兩套起升機構， 提高岸邊集裝箱起重機的裝卸效率；同時由於採用一行星 φ 差動減速器和兩個差動軸制動器，通過兩差動軸制動器控 制兩差動出軸的轉動，以控制每一捲筒的工作，從而可以 實現雙吊具同步作業或單吊具工作的狀態，以滿足裝卸的 需求；另外由於採用一套行星差動減速器驅動兩套起升機 構，不僅結構簡單重量輕成本低，並且維修簡單方便，因 此極為實用。 雖然本創作已以較佳實施例揭露如上，然其並非用以 限定本創作，任何熟習此技藝者，在不脫離本創作之精神 14 M3im2 和範圍内，當可作些許之更動與潤飾，因此本創作之保護 範圍當視後附之申請專利範圍所界定者為準。 【圖式簡单說明】 圖1是本創作雙40英呎岸邊集裝箱起重機兩捲筒差 動式起升機構第一實施例具有兩個馬達的起重機起升機構 的結構示意圖。 圖2是本創作雙40英呎岸邊集裝箱起重機兩捲筒差 動式起升機構第二實施例具有一個馬達的起重機起升機構 的結構示意圖。 【主要元件符號說明】 10、 11、12 :馬達 11、 111、112、121、122 :高速制動器 20 :減速器（行星差動減速器） 21、22 :低速輸出軸 23、24 :高速輸入轴 30 捲筒 • 31 陸側捲筒 32 海側捲筒 31 卜 312、313、314、32卜 322、323、324 :出繩 40、41、42、43、44 :捲筒制動器 50、51、52 :差動軸制動器 15The output terminals are connected, and two high speed brakes 121 and 122 are provided on the high speed input shaft 24 of the planetary differential speed reducer 20. The low speed output shaft of the planetary differential speed reducer 20 is used to drive the rotation of the four rope take-up reels; in the embodiment, the planetary differential speed reducer 2 has two low speed output shafts 21 and 22 connected to each other. On the land side low speed output shaft 21 is a land side four rope take-up reel 31, and the four outlet ropes 311, 312, 313, 314 of the land side four rope take-up reel 31 are connected to a spreader; On the output shaft 22 is a sea side four rope take-up reel 32, and the four side rope reels M315, 7^2 32 of the sea side are connected to another spreader; The four rope take-up reels 31 and 32 are rotated by the rotation of the low speed output shaft of the planetary differential speed reducer 20. A drum brake 40 for controlling the rotation of the four rope take-up reels 30 is provided on each of the four rope take-up reels 30 described above, in order to realize emergency braking of the two spreaders on the land side and the sea side, and simultaneously by the two spreaders The lifting and lowering are converted into a lifting device for lifting and lowering. In the present creation, two reel brakes 40 are respectively disposed on the four-rope reel 30, that is, on the four-rope reel 31 on the land side. Two reel brakes 41 and 42 are provided; two reel brakes 43 and 44 are also provided on the four-rope reel 32 on the Luhai side. The differential shaft brake 50 disposed on the differential output shaft of the planetary differential speed reducer 20 is for controlling the power distribution of the planetary differential speed reducer 20. In the present creation, the differential shaft brake 50 has two differential axes. The brake, that is, the first planetary mechanism differential shaft brake 51 and the second planetary mechanism differential shaft brake 52, the two differential shaft brakes 51 and 52 are respectively connected to the two differential output shafts of the planetary differential speed reducer 20, The operation state of the four rope take-up reels 30 on the land side and the sea side is controlled; wherein the first planetary mechanism differential shaft brake 51 φ is connected to a differential shaft of the planetary differential speed reducer 20, and the differential shaft is used for the differential shaft To control the four-rope reel 31 on either side of the land side or the sea side; the second planetary mechanism differential shaft brake 52 is coupled to another differential shaft in the planetary differential reducer 20, the differential shaft Used to control the four-rope reel 32 on the other side. The above control principle of the differential axle brake system 50 for controlling the planetary differential speed reducer is: If both differential axle brakes 51 and 52 are moved, all of the high speed axle brake 11 and the drum brake 40 are opened, and the power is automatically distributed according to the external load torque. To M31^2 corresponding sea side reel, land side reel; if one of the two planetary mechanism differential shaft brakes 51 and 52 is open and the other differential shaft brake is braked, the power is concentrated to the drum brake The opened reel, at which the reel of the other side of the reel brake does not obtain the torque of the motor; conversely, if the braking and opening of the two differential shaft brakes are exchanged, the power is concentrated and the other side is opened. The reel of the reel brake, while the reel brake that is closed relative to the reel brake on the other side does not obtain the torque of the motor. Please refer to FIG. 2 in conjunction with FIG. 1. FIG. 2 is a schematic structural view of a crane lifting mechanism having a motor according to a second embodiment of a dual 40-inch shore container crane. In the present embodiment, the crane hoisting mechanism is composed of a motor 10, a speed reducer 20, a four-out rope reel 30, a reel brake 40, and a differential shaft brake 50. The present embodiment is different from the first embodiment in that when the power of the motor 10 is sufficiently large, a motor 11 can be provided; at this time, the output shaft φ of the motor 11 is connected to a high speed input shaft 23 of the planetary differential speed reducer 20, Two high speed brakes m, 112 are provided on the high speed input shaft 23 of the planetary differential speed reducer 20. Referring to Figures 1 and 2, this creation shows how a double spreader can be used to synchronize work and to operate a single spreader on either side. The differential shaft brakes 51 and 52 in the present invention control the rotation of the differential output shaft of the two planetary gear trains of the planetary differential speed reducer 20 to control the simultaneous rotation of the reel on the land side and the reel on the sea side, or The reel on the land side and the reel on the sea side 13 M315702 are independently rotated to achieve simultaneous control of the land side spreader and the sea side spreader, and also to control the land side spreader and the sea side spreader respectively. . When the double spreader is required to work simultaneously: the differential shaft brakes 51 and 52 are all braked, all of the high speed axle brakes 111, 112 and the spool brake 40 are opened, and the power of the motor 11 is simultaneously outputted through the low speed output shaft of the planetary differential speed reducer 20 to Reels 31, 32, so that the crane can simultaneously lift a double 40 (or 45) inch box, or a 40 (or 45) inch box plus two 20-inch boxes, or four 20-inch boxes • When one-side spreader operation is required: When one of the differential shaft brakes 51 and 52 is opened and the other brake is braked, the power is concentrated to the reel in which the reel brake is opened, and the reel brake on the other side is closed. The reel does not get the torque of the motor. In summary, this creation uses a planetary differential reducer with both sides of the sea and the sea, that is, a set of motors and reducers are used to connect the two sets of lifting mechanisms to improve the loading and unloading efficiency of the shore container crane; φ differential reducer and two differential shaft brakes control the rotation of the two differential output shafts through two differential shaft brakes to control the work of each reel, so that double spreader synchronization operation or single spreader work can be realized The state meets the requirements of loading and unloading; in addition, the use of a planetary differential reducer to drive two sets of lifting mechanisms not only has a simple structure, low weight, low cost, and simple and convenient maintenance, so it is extremely practical. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and anyone skilled in the art can make some changes and refinements without departing from the spirit of the present invention. The scope of protection of this creation is subject to the definition of the scope of the patent application attached. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the structure of a crane hoisting mechanism having two motors in a first embodiment of a dual 40-inch shore container crane of the present invention. 2 is a schematic view showing the structure of a crane lifting mechanism having a motor in the second embodiment of the present invention. [Main component symbol description] 10, 11, 12: Motor 11, 111, 112, 121, 122: High-speed brake 20: Reducer (planetary differential reducer) 21, 22: Low-speed output shaft 23, 24: High-speed input shaft 30 Reel • 31 Land side reel 32 Sea side reel 31 312, 313, 314, 32 322, 323, 324: Rope 40, 41, 42, 43, 44: Reel brakes 50, 51, 52 : Differential Axis Brake 15