1262112 九、發明說明： 【發明所屬之技術領域】 一種電動工具扭力控 本备明係關於―控制裝置，尤指 制裝置。 l九則技術】 所谓的電動工且 g户鞋 令使用者可" 動馬達驅動—工具頭而 易地完成鑽孔或螺合等H由於每-工 具頭對應其使用對象皆廡右 工 十“應有不同之最佳扭力，故現有一般 紐：公均可針對不同之工具頭而調整其適當對應之 八工呈亚=使用中—旦遭遇超過其原本所^定扭力時，即 々工具頭：時性的脫離馬達驅動以保護工具頭及馬達。 現有系見之電動工豆，係 一 /、知以枝械式之方式，利用改變 评頁之壓力來子苜Μ 4 預叹扭力大小，藉由對該彈簧施予之壓 力’而使工具頭可J主 、、，被馬達所驅動；然當遭遇超過設定 扭力時，則會因彈I I又 Η之抗力而使工具頭暫時性的脫離馬達 之驅動’進而達到伴 J保瘦工具頭與避免馬達燒壞之目的。 惟上述之方y , 乃有以下之缺點’其一為藉由對妓 施予壓力來調整扭六I， ^ 旧对浮耳 大小’貫不易精確地調整至所需之 力大小，另—ii| /士 一 、〜使用中超過其設定扭力時，係僅令工 頭脫離馬達之驅動， > " 亚未々馬達停止，如此馬達仍會持續 空轉，除消耗血-夕+ t 灯、、男 …、叫之电此外，亦對馬達之壽命有影響。 由此可知，如At 月匕挺供一電動工具之控制裝置，並 準地被設定其所兩少+丄 /'」私 而之扭力大小，且當使用中超過其設定扭 1262112 - 力日可，可籍由停止馬達之轉動而達到保護工具頭與避免馬 達燒壞之目的。 [發明内容] 為 本务明之主要目的在提供一種可精確地依實際 、、 力大小，且可保缦馬達避免燒壞的電動工具扭 力控制裝置。 ^ 為達成前述目的所採取之主要技術手段係令 裝置包括有： 開關包路，係連接於直流電源與一馬達之間； 抑 处理杰，其一輸出端係連接前述開關電路， 以控制該開關電路之開閉； 电峪 —=檢知電路’其輸人端係連接於直流電源與馬達 之間’以檢測馬達負载電·的變化狀況; "達 一扭力檢知電路’其輸入 接，其輸出端則與前μ Β ΰ由u“屋檢知電路連 兩芦之枚日片處理态連接，可將馬達負載 包壓之雙化狀況轉換 咬貝戰 片處理器；^成馬叙㈣扭力值，並輸人該單晶 山、一扭：設定單元，係供使用者預設扭力大小，轉Ψ 立而連接至‘逑單晶片處理器。 ，、知出 當前述控制裝置配人一 + 力設定單元先預設―扭口力：力工具使用時，可利用該扭 、 紐力值，待使用時，， 藉由馬達與直流電源間兩 、〜电壓檢知電路 的變動狀況或利用單位 員載弘壓、電流 早位日守間内電壓、電流的變化次數，再 4 1262112 透過該扭力檢知電路將該負載電壓的變動狀況轉換成反應 馬達扭力變動狀況之值並輪入該單晶片處理器；該單晶片 處理器根據由杻力設定單元所μ宕 又疋平7L所，又疋之扭力值，與由扭力檢 知電路輸入之檢測值作比較，杳 千乂母迅動工具工作時之扭力大 方；預設之扭力時，單a Η卢 口口 t早曰曰片處理$即令該開關電路關閉，進 而切斷馬達與直流電源之遠 功致。 兒之連接以達到保言隻馬達與工具頭之 本發明進一步句扭一 es - 係連接至前述單…其中該顯示器之輸入端 小。]、早曰曰片處理器，用以顯示所設定之扭力大 本發明進一步包括一古 路，其中該高壓檢知…“電路與-低壓檢知電 ^ %路與低壓檢知電路之於人☆山八兒丨& 鉍W述電壓檢知電路 路之輸入螭刀別係 晶片處理哭，用，而輸出端則分別連接至前述單 況下工作。 在直級电源電壓過高或過低狀 【貫施方式】 如第一圖所示，4 之基本架構示意圖，其Z括有發明電動工具扭力控制裝置 開關電路（1 〇 ) 間；於本實施例中，^、’係連接於—馬達和直流電源之 „ ^直流電源為一電池· 枣晶片處理器（2 關電路（1 η ) ’其輸出端係連接至前述開 、丄υ」，控制該開問兩牧r， -電壓檢知電路（3 “路（1〇)之開閉，· ’其輪入端係連接於馬達與 5 1262112 之間，用以檢測馬達負載之電厭 „ ^ ^ ^ <、電流變動狀況 ，曰1 ^免壓、電流的變化次數； 力檢知電路（4 0 )，其輪入端私 „ , 0 而你連接至前述電 路（3 0 ) ’其輸出端則連接至< 安主別述單晶片處理 )，用以將馬達負載之電壓變务紅 ▼、 化轉換成馬達實際 小，並輸入該早晶片處理器（2〇) 、1262112 IX. Description of the invention: [Technical field to which the invention pertains] Torque control of a power tool This specification relates to a "control device, especially a device." l Nine technology] The so-called electric worker and the g-shoes allow the user to easily drill or screw the H by the motor drive-tool head, because each tool head corresponds to its use object. "There should be different optimal torques, so the existing general New Zealand: the public can adjust the appropriate corresponding eight-worker for different tool heads. If you encounter more than the original torque, you will find the tool. Head: Temporary off-motor drive to protect the tool head and motor. The electric peas that are currently seen in the department are one-piece, known to use the pressure of the page to change the pressure of the page. 4 Pre-sighing torque By means of the pressure applied to the spring, the tool head can be driven by the motor, and when the torque exceeds the set torque, the tool head is temporarily disabled due to the resistance of the bomb II. Drive away from the motor's drive to achieve the purpose of the J-thickness tool head and avoid the motor burnout. However, the above-mentioned square y has the following disadvantages. One of them is to adjust the twisted six I by applying pressure to the 妓. Old pairs of floating ears are not easy to adjust accurately To the required force, the other - ii | / 士一, ~ in use exceeds its set torque, only the foreman is driven off the motor, >""" In addition to the consumption of blood - eve + t light, male ..., called electric, in addition, it also has an impact on the life of the motor. It can be seen that, for example, At the moon, a control device for a power tool is provided, and it is set to be Two less + 丄 / '" private torque, and when used in excess of its set twist 1262112 - force can be achieved by stopping the rotation of the motor to protect the tool head and avoid motor burnout. SUMMARY OF THE INVENTION It is a primary object of the present invention to provide a torque control device for a power tool that can be accurately and practically sized and that can protect the motor from burnout. ^ The main technical means adopted to achieve the above objectives are: the switch package is connected between the DC power supply and a motor; and the processing terminal is connected to the switch circuit to control the switch. The opening and closing of the circuit; the electric 峪-= detection circuit 'the input end is connected between the DC power supply and the motor' to detect the change of the motor load electric power; "a torque detection circuit' its input connection, its The output end is connected with the front μ Β ΰ by the u "house detection circuit connected with the two reeds of the film processing state, which can convert the motor load to the double state to convert the bite film processor; ^ Cheng Ma Xu (4) Torque Value, and input the single crystal mountain, a twist: set the unit, for the user to preset the torque, turn to connect to the '逑 single chip processor.,, know that when the aforementioned control device is equipped with a + The force setting unit first presets the “torque force”: when the force tool is used, the twisting and the button force value can be used. When the motor is used, the voltage or the power source is detected by the motor and the DC power source. Member carrying Hong pressure, electricity The number of changes in voltage and current in the early daytime interval, and then the current detection circuit converts the fluctuation of the load voltage into a value of the torque variation of the reaction motor and turns into the single-chip processor; The wafer processor is compared with the detected value input by the torsion detecting circuit according to the torque value set by the force setting unit and the level of the torque is 7L, and the torque of the milli-mother moving tool is generous when working; When the torque is preset, the single a Η 口 t 曰曰 曰曰 曰曰 曰曰 处理 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即 即Further, the invention is connected to the foregoing single device, wherein the input end of the display is small.], the early chip processor is used to display the set torque. The invention further includes an ancient road, wherein the high voltage Detect... "Circuit and - Low-voltage detection of electricity ^ % road and low-voltage detection circuit for people ☆ mountain eight children 丨 &; 述 述 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压 电压Output Do not connect to the aforementioned single conditions to work. In the case of a straight-line power supply voltage is too high or too low [through the way] as shown in the first figure, the basic architecture diagram of 4, including the invention of the power tool torque control device switching circuit (1 〇); In the example, ^, ' is connected to the motor and DC power supply ^ ^ DC power supply for a battery · jujube wafer processor (2 off circuit (1 η) 'its output is connected to the above open, 丄υ", control The question asks the two grazing r, - voltage detection circuit (3 "road (1 〇) opening and closing, · 'the wheel end is connected between the motor and 5 1262112, used to detect the motor load's electrical disgusting ^ ^ ^ ^ <, current fluctuation condition, 曰 1 ^ voltage-free, current change times; force detection circuit (40), its turn-in end private „, 0 and you connect to the aforementioned circuit (3 0) 'its output Then, it is connected to the < security mains single-chip processing), which is used to convert the voltage of the motor load into red, and convert it into a small actual motor, and input the early wafer processor (2〇),
壓檢知電路（5 〇) ’其輪入端係'連接前述電厂堅 (30) ’其輸出端則連接至前逃單晶片處理器 ’用以將直流電源之電壓值與—參考電壓作比較， 源之電壓大於該參考電壓時，則令該單晶片處理 )將該開關電路（1 0 )關閉；The pressure detection circuit (5 〇) 'its wheel-in terminal' connects to the aforementioned power plant (30) 'the output is connected to the front escape single chip processor' to use the voltage value of the DC power supply and the reference voltage Comparing, when the voltage of the source is greater than the reference voltage, the single-chip processing is performed) the switching circuit (10) is turned off;
直流電源 或單位時 一扭 壓檢知電 器（2 0 扭力之大 一南 檢知電路 (20) 當直流電 器（2〇 一低 知電路（ 器（2 0 比較，當 晶片處理 壓檢知電路（60)，其輸入端係與前述電壓檢 3 0 )連接’其輸出端則連接至前述單晶片處理 )，用以將直流電源之電壓值與另—參考電壓作 直流電源之電壓值小於該參考電壓時，則令該單 器（2 0 )將該開關電路（1〇）關閉； 扭力ό又疋單元（7 0 )，其輸出端係連接至前述單 晶片處理器（2 〇 )，用以將使用者預設之扭力值傳送至 "亥單晶片處理器（2 0 ); 一顯示器（8 0 )，其輸入端係與前述單晶片處理器 (2 〇 )連接，用以顯示預設之扭力。 士弟一 0所不為本發明一較佳貫施例的詳細電路圖， 忒開關電路（1 〇 )包括一驅動電晶體（1 1 )與一開關 電晶體（1 2 )，其中該驅動電晶體（1 1 )為一 BJT， 6 1262112 該開關電晶體（1 2 )為-咖τ;該驅動電晶體（工丄: =基極係透過―電阻R連接至該單晶片處理器（2 〇 )， 集極則連接至該開關電晶體（ 曰雕 、丄d」之閘極，而该開關電 :: 2 )係以汲、源極連接於直流電源與馬達之間。 、、單曰曰片處理為、（2 〇 )輪出高電位使驅動電晶體（1 1 ) :通時，胃開關電晶體（12)亦被導通，則 反之，當驅動電晶體（川截止時，則開關 私曰曰二（1 2 )關閉，此時直流電源停止供電予馬達。 ^亥甩壓檢知電路（3 0 )係由分壓電阻R卜R2所組成， R1相對於分壓節點的另一端係連接於直流電 電路C 1 η λ /、岡w 之間其與黾阻R 2連接處的分壓節點則構成 一輸出端。 再风 =力檢知電路（40)係包括一由⑽與。所組成 回授連放大器，其中…大器咖 思娱至負螭輸入而構成一緩衝器。 ^壓檢知電路（5 Q )係為—由〇p放大器^ :，错由前述電壓檢知電路Ο”之輸出端輸出 入：：：比較器之負端輸入，而於比較器之正端輪入則輸 於參；當該電壓檢刚（3〇)之輸出電壓大 m ^ ^ 則比車父器輸出端在單晶片處理器（2 〇 )的 對應接腳上形成狀带 、ζ ϋ )的 _兒位，告知此時直流電源的電壓過古， 故將開關電路（丄n、 q 兒土過问 ^ 丄υ )關閉，以提供高壓保護。 口亥壓檢知+ 之比 路（6 0 )係為一由0Ρ放大器U3B構成 ^，猎由前述電壓檢知電路（3 0 )之輪出端輸出 7 1262112 一電壓予比較器之正端輪入， 入另-參考電壓，當該電”；比較器之負端輸入則輸 小於該灸考雨屙 弘土 ""知電路（2 0 )之輸出電壓 豕芩考包壓’ m比較器輪出 。 的對應接腳上形成低電位，而在早曰曰片處理器（20) 低，故將開關電路（10) g二此時直流電源的電壓過 該扭力設定單元（70，’以提供低壓保護。 -扭力設定電路（72)戶輪：，由-切換開關（”）與 2 )係由複數個電阻所構成，卷：、中。亥扭力没疋電路（7 接點接通時，單晶片處理器（:刀換開關（71)的不同 同電位，以達到設定扭力之目的0)的對應接腳將呈現不 該顯示器（8 0 )為一七 前述單晶片處理器（i 。^不器’其輸入端連接至 如第三圖所示，為本發明 路，其構造與前一實施例大致相门佳實施例之詳細電 定單元（7 0，）係由—可问，不同處在於該扭力設 路（7 2，）所組成，其中7 3 )與一扭力設定電 ^扭力吕殳定電路（7?，）粆勺 栝一由R6與C2所組成 ）係包 中…大器係令輸出端回二二大器，其 衡器。 至負知輸入而構成一缓 由上述可知’藉由該 <透過馬達與直流電源間電…-路與扭力檢知電路， 間内錢、電流的變化次數二：：流之變化或利用單位時 草晶片處理器則根據由扭力二時馬達之扭… 力檢知電路所檢測之馬達扭力作：：所！設之扭力與由扭 車又’右馬達扭力大於設 8 1262112 - 定之扭力大小，則切斷輸出而令開關電路中之開關電晶體 不導通，使馬達與直流電源之間形成斷路，藉以對馬達及 工具頭構成保護。 縱上所述，本發明相較既有電動工具之扭力設定裝置 已具備顯著功效增進，並符合發明專利要件，爰依法提起 申請。 【圖式簡單說明】 I 第一圖：本發明之基本架構示意圖 第二圖：本發明一較佳實施例之電路圖 第三圖：本發明另一較佳實施例之電路圖 【主要元件符號說明】 (10) ( 1 0 ’）開關電路 (11) ( 1 1 ’）驅動電晶體 (12) ( 1 2 ’）開關電晶體 (20) ( 2 0 ’）單晶片處理器 ^ ( 3 0 ) (30’）電壓檢知電路 ( 4 0 ) ( 4 0 ’）扭力檢知電路 ( 5 0 ) (50’）高壓檢知電路 ( 6 0 ) (6 0’）低壓檢知電路 ( 7 0 ) (70，）扭力設定單元 (7 1 )按鍵式開關 ( 7 2 ) (72’）扭力設定電路 (7 3 )可變電阻 ( 8 0 ) ( 8 0 ’）顯示器 9DC power supply or unit when a torsion detection of electrical appliances (2 0 torsion of a large South detection circuit (20) when DC electrical appliances (2 〇 a low-knowledge circuit (2 0 comparison, when the wafer processing pressure detection circuit ( 60), the input end is connected with the voltage detection 3 0), and the output end is connected to the single-chip processing, and the voltage value of the DC power supply and the voltage of the DC voltage source of the other reference voltage are smaller than the reference. When the voltage is applied, the single circuit device (2 0 ) turns off the switching circuit (1〇); the torque is further connected to the unit (7 0 ), and the output end thereof is connected to the single-chip processor (2 〇) for Transmitting the preset torque value of the user to the "Hai single chip processor (20); a display (80) having an input terminal connected to the single chip processor (2 〇) for displaying the preset The torque circuit is not a detailed circuit diagram of a preferred embodiment of the present invention, and the switch circuit (1 〇) includes a driving transistor (1 1 ) and a switching transistor (1 2 ), wherein The driving transistor (1 1 ) is a BJT, 6 1262112, the switching transistor (1 2 ) - 咖τ; the driver transistor (worker: = base is connected to the single-chip processor (2 〇) through the resistor R, and the collector is connected to the gate of the switch transistor (曰 丄, 丄d) The pole, and the switch is: 2) is connected between the DC power supply and the motor by the 汲 and the source. The single 曰曰 is processed as (2 〇) and the high potential is driven to drive the transistor (1 1 ) : When the time is up, the stomach switch transistor (12) is also turned on. On the contrary, when the transistor is driven (the switch is turned off, the switch is turned off (1 2), and the DC power supply stops supplying power to the motor. The rolling detection circuit (30) is composed of a voltage dividing resistor Rb R2, and the other end of R1 is connected to the DC circuit C1 η λ /, 冈 w and the R resistance R 2 with respect to the other end of the voltage dividing node. The voltage dividing node at the connection constitutes an output end. The re-winding force detection circuit (40) comprises a feedback amplifier composed of (10) and (.), which is composed of a large-scale device and a negative input. Buffer. ^Voltage detection circuit (5 Q) is - output from the output of the 电压p amplifier ^:, the wrong voltage detection circuit Ο" ::The negative input of the comparator, and the input to the positive terminal of the comparator is input to the reference; when the output voltage of the voltage detection (3〇) is large, m ^ ^ is processed on the single chip than the output of the parent device. The _child of the band (ζ ϋ) on the corresponding pin of the device (2 〇) informs that the voltage of the DC power supply is too old, so the switch circuit (丄n, q 儿过过^^) is turned off. In order to provide high voltage protection. The mouth of the sea pressure detection + the ratio of the road (60) is composed of 0Ρ amplifier U3B ^, hunting by the voltage detection circuit (3 0) wheel output 7 1262112 a voltage to The positive end of the comparator is wheeled in, and the other - reference voltage is used as the "electricity"; the negative input of the comparator is less than the output voltage of the moxibustion test, and the output voltage of the circuit (2 0) Test package pressure 'm comparator wheeled out. The corresponding pin forms a low potential, and the early die processor (20) is low, so the switching circuit (10) g 2 at this time the DC power supply voltage is passed through the torque setting unit (70, 'to provide low voltage protection) - Torque setting circuit (72) Household wheel: The -switching switch (") and 2) are composed of a plurality of resistors, and the coils are in the middle of the circuit. When the 7 contacts are turned on, the single chip The corresponding pin of the processor (the different switching potential of the knife change switch (71) to achieve the purpose of setting the torque 0) will present the display (8 0) as a seven-seventh single-chip processor (i. 'The input end is connected to the road of the present invention as shown in the third figure, and the structure is substantially the same as that of the previous embodiment. The detailed electric unit (70) is related to the question. The difference lies in The torque setting circuit (7 2,) is composed of 7 3 ) and a torque setting electric torque torque device (7?,) 粆 栝 由 由 由 由 由 由 由 由 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... End back to the second and second largest, its weighing instrument. To the negative input input constitutes a mitigation by the above known 'by the < Between the motor and the DC power supply...-The road and the torque detection circuit, the number of changes in the money and current between the two: the change of the flow or the use of the unit when the grass wafer processor is based on the twist of the torque motor... The torque of the motor detected by the detection circuit is:: The torque set by the torque and the torque of the right motor is greater than the torque of 8 1262112. The output is cut off and the switching transistor in the switching circuit is not turned on. The invention forms an open circuit between the motor and the DC power source, thereby protecting the motor and the tool head. In the above, the present invention has significant power improvement compared with the existing torque setting device of the power tool, and conforms to the patent requirements of the invention. [Application for a Brief Description] [First Embodiment] FIG. 1 is a schematic diagram of a basic structure of the present invention. FIG. 3 is a circuit diagram of a preferred embodiment of the present invention. Explanation of Symbols] (10) (1 0 ') Switching Circuit (11) (1 1 ') Driving Transistor (12) ( 1 2 ') Switching Transistor (20) ( 2 0 ') Single Chip Processor ^ ( 3 0 (30') Voltage detection circuit (40) (4 0 ') Torque detection circuit (50) (50') High voltage detection circuit (60) (6 0') Low voltage detection circuit (7 0 (70,) Torque setting unit (7 1 ) Push button switch ( 7 2 ) (72') Torque setting circuit (7 3 ) Variable resistance ( 8 0 ) ( 8 0 ') display 9