CN101870097A - Electric screw driver having magnetic force overload protector - Google Patents
Electric screw driver having magnetic force overload protector Download PDFInfo
- Publication number
- CN101870097A CN101870097A CN 201010180687 CN201010180687A CN101870097A CN 101870097 A CN101870097 A CN 101870097A CN 201010180687 CN201010180687 CN 201010180687 CN 201010180687 A CN201010180687 A CN 201010180687A CN 101870097 A CN101870097 A CN 101870097A
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- sleeve
- permanent magnet
- screw driver
- driving shaft
- magnetic force
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Abstract
The invention discloses an electric screw driver having a magnetic force overload protector. The screw driver comprises a shell, a motion delivering mechanism which comprises a motor, a motor gear, a driving shaft gear and a driving shaft, and a screw driver component which comprises a screw driver head, an output shaft and a head cover connected to a mounting slot, wherein a sleeve is arranged on one end of the driving shaft close to the screw driver head; more than two big permanent magnets are arranged outside the sleeve at equal intervals; small permanent magnets having a same number of the big permanent magnets are arranged on the output shaft in the sleeve at equal intervals; a U-shaped shifting fork is fixedly connected to two end faces of the sleeve after being inserted from the exterior of the shell; and the U-shaped shifting fork drives the sleeve to axially slide on the driving shaft. The magnetic force overload protector has simple structure, is capable of efficiently performing the overload protection function, generates no friction and noise, is environment-friendly, and can be set with different limited torques by regulating the shifting fork on the shell.
Description
Technical field
The present invention relates to hand held electric tool, especially relate to a kind of electric screw driver with magnetic force overload protector.
Background technology
At present, though the kind of electric screw driver is many on the market, the overload protective device great majority that they adopt are the mechanical type control method still, promptly castellated overload protective device, and by master and slave moving part tooth engagement, driven member rotates under driving link drives thereupon.As the patent No.: in 200710070176.4; what adopt is mechanical type sour jujube tooth clutch; maximum shortcoming can produce noise exactly, and can since between tooth repeatedly friction and bump make the overload protective device life-span reduce greatly, the service life that the while has also been reduced electric screw driver.All very complicated as the overload clutch structure among the patent No.: the 99229360.X, 200620106541.3 and 200720112276.4, exist assembling difficulty, the problems such as cost height made.
Summary of the invention
The object of the present invention is to provide a kind of electric screw driver with magnetic force overload protector; this overload protecting mechanism has utilized the contactless torque transfering characteristic between two groups of annular permanent magnets; when the torque of bearing when driver bit has surpassed specified torque; driver bit stops operating; and motor shaft can be rotated further and can not be damaged; to reach the purpose of overload protection, the relative area that can change two groups of annular permanent magnets simultaneously by the position of adjusting the U-shaped shift fork is set different breakdown torques.
The technical solution adopted for the present invention to solve the technical problems is:
The present invention includes housing, the movement transferring of forming by motor, motor gear, axle shaft gear and driving shaft, the driver bit assembly that output shaft that is connected with mounting groove by driver bit and head-shield are formed; Installing sleeve on the close end of driver bit of driving shaft, sleeve is uniformly-spaced installed plural big permanent magnet outward, be positioned at the little permanent magnet of uniformly-spaced installing on the output shaft of sleeve with big permanent magnet same number, the U-shaped shift fork inserts the back from the housing outside and fixedlys connected with the sleeve both ends of the surface, and the U-shaped shift fork drives sleeve and can be in axial sliding on driving shaft.
Described big permanent magnet and little permanent magnet are 2-10.
The interior ring magnetic of described big permanent magnet is opposite with the outer shroud magnetic polarity of little permanent magnet.
The present invention compares the beneficial effect that has with background technology:
Hand held electric tool of the present invention has magnetic force overload protector; when the torque of bearing when driver bit surpasses nominal torque; because the contactless property of magnetic drives; driver bit can stop operating; and that motor can be rotated further is unaffected; can avoid the suffered torque of screw to continue to increase and broken like this; simultaneously also can make operating personnel avoid being subjected to bigger anti-torque; can reach the purpose of overload protection effectively; and this overload protective device is simple in structure; there is not friction; impact little; noiseless; environmental protection; prolonged service life greatly, and can be according to the torque of concrete needs accommodation limit.
Description of drawings
Fig. 1 is the structural principle schematic diagram of electric screw driver.
Fig. 2 is the magnetic force overload schematic diagram.
Fig. 3 is the A-A cutaway view of Fig. 2.
Fig. 4 is permanent magnet and permanent magnet magnetic pole distribution schematic diagram.
Among the figure: 1, driver bit, 2, mounting groove, 3, head-shield, 4, bearing, 5, little permanent magnet, 6, bearing, 7, driving shaft, 8, axle shaft gear, 9, bearing, 10, motor, 11, motor gear, 12, housing, 13, sleeve, 14, the U-shaped shift fork, 15, big permanent magnet, 16, output shaft.
The specific embodiment
As shown in Figure 1 and Figure 2, the present invention includes housing 12, the movement transferring of forming by motor 10, motor gear 11, axle shaft gear 8 and driving shaft 7, the driver bit assembly that output shaft 16 that is connected with mounting groove 2 by driver bit 1 and head-shield 3 are formed.Installing sleeve 13 on driving shaft 7 close ends of driver bit 1, plural big permanent magnet 15 uniformly-spaced is installed outside the sleeve 13, in the present embodiment be 4, little permanent magnet 5 with big permanent magnet 15 same number uniformly-spaced is installed on the output shaft 16 that is positioned at sleeve 13, U-shaped shift fork 14 inserts the back and fixedlys connected with sleeve 13 both ends of the surface from housing 12 outsides, U-shaped shift fork 14 drives sleeve 13 and can be in axial sliding on driving shaft 7, as shown in Figure 3, what adopt in the present embodiment is that spline connects, and is to be dynamically connected.
As shown in Figure 4, the interior ring magnetic of described big permanent magnet 15 is opposite with the outer shroud magnetic polarity of little permanent magnet 5, and promptly little permanent magnet 5 outer shroud magnetic poles are the S utmost point, and the interior ring magnetic pole of then big permanent magnet 15 is the N utmost point, otherwise perhaps.
Operation principle of the present invention is as follows:
As shown in Figure 1, in the housing 12 of electric screw driver motor 10 is housed, when motor 10 rotates, motor gear 11 on the armature shaft of motor 10 and 8 engagements of the axle shaft gear on the driving shaft 7, on the bearing 6 of driving shaft 7 two end supports in housing 12, the bearing 9, be delivered on the driving shaft 7 thereby will rotatablely move.
As Fig. 1, Fig. 2, shown in Figure 3, be connected by spline between sleeve 13 and the driving shaft 7, big permanent magnet 15 is fixed on the sleeve 13, when driving shaft 7 rotates, big permanent magnet 15 will rotate thereupon, the little permanent magnet 5 of another piece is fixed on the output shaft 16, and output shaft 6 itself is fixed in the housing 12 by bearing 4.Because the torque of magnetic force effect between two block permanent magnets, big permanent magnet 15 can drive little permanent magnet 5 and rotate, rotate thereby drive output shaft 16, connect the driver bit assembly on the output shaft 16, thereby can drive driver bit 1 work.
When driver bit 1 suffered load torque has surpassed specified torque; because between two groups of permanent magnets is contactless transmitting torque; output shaft 16 and driver bit 1 all can stop operating; and motor 10 and driving shaft 7 are rotated further; can avoid motor to damage like this and screw is subjected to excessive moment and damages, reach the purpose of overload protection.Between sleeve 13 and the driving shaft 7 is to be dynamically connected, and can reach the position of change sleeve 13 with respect to driving shaft 7, thereby change two relative areas between the annular permanent magnet, thereby reach the purpose that changes breakdown torque by stirring the U-shaped shift fork 14 on the housing 12.
Claims (3)
1. electric screw driver with magnetic force overload protector, comprise housing (12), the movement transferring of forming by motor (10), motor gear (11), axle shaft gear (8) and driving shaft (7), the driver bit assembly that output shaft (16) that is connected with mounting groove (2) by driver bit (1) and head-shield (3) are formed; It is characterized in that: installing sleeve (13) on the close end of driver bit (1) of driving shaft (7), the outer plural big permanent magnet (15) of uniformly-spaced installing of sleeve (13), little permanent magnet (5) with big permanent magnet (15) same number uniformly-spaced is installed on the output shaft that is positioned at sleeve (13) (16), U-shaped shift fork (14) inserts the back from housing (12) outside and fixedlys connected with sleeve (13) both ends of the surface, and U-shaped shift fork (14) drives sleeve (13) and can be in axial sliding on driving shaft (7).
2. a kind of electric screw driver with magnetic force overload protector according to claim 1 is characterized in that: described big permanent magnet (15) and little permanent magnet (5) are 2-10.
3. a kind of electric screw driver with magnetic force overload protector according to claim 1 is characterized in that: the interior ring magnetic of described big permanent magnet (15) is opposite with the outer shroud magnetic polarity of little permanent magnet (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010180687 CN101870097A (en) | 2010-05-21 | 2010-05-21 | Electric screw driver having magnetic force overload protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010180687 CN101870097A (en) | 2010-05-21 | 2010-05-21 | Electric screw driver having magnetic force overload protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101870097A true CN101870097A (en) | 2010-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010180687 Pending CN101870097A (en) | 2010-05-21 | 2010-05-21 | Electric screw driver having magnetic force overload protector |
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| CN (1) | CN101870097A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103442853A (en) * | 2011-03-18 | 2013-12-11 | 阿特拉斯·科普柯工业技术公司 | Method for tightening screw joints with a hand held power tool |
| CN105666394A (en) * | 2015-12-31 | 2016-06-15 | 宁波中旺工具有限公司 | Electric screw driver |
| CN106499746A (en) * | 2016-12-05 | 2017-03-15 | 柳州煜华科技有限公司 | A kind of magnetic gear |
| CN106584342A (en) * | 2017-02-06 | 2017-04-26 | 苏州全丰精密机械有限公司 | Magnetic coupling electric screwdriver |
| CN106625371A (en) * | 2017-02-06 | 2017-05-10 | 苏州全丰精密机械有限公司 | Double-pulse feedback type electric screwdriver |
| CN106655618A (en) * | 2017-02-06 | 2017-05-10 | 苏州全丰精密机械有限公司 | Magnetic coupling electric screwdriver load testing device |
| CN106695647A (en) * | 2017-02-06 | 2017-05-24 | 苏州全丰精密机械有限公司 | Electric screwdriver for synchronously measuring speed and load |
| CN107717825A (en) * | 2017-11-14 | 2018-02-23 | 王传江 | A kind of controllable spanner of automobile production manufacture gas type |
| CN108942768A (en) * | 2018-09-05 | 2018-12-07 | 上海运征机电科技有限公司 | A kind of small-sized DC bumping electric spanner |
| CN109514487A (en) * | 2018-12-16 | 2019-03-26 | 广东星联精密机械有限公司 | A kind of workpiece rapid disassembling device |
| CN111148603A (en) * | 2017-09-26 | 2020-05-12 | 松下知识产权经营株式会社 | Electric tool |
| CN113685404A (en) * | 2020-05-19 | 2021-11-23 | 华为技术有限公司 | Pressing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88200763U (en) * | 1988-01-25 | 1988-09-14 | 最优化报社镇江科技开发部 | Magnetic over-load protector |
| CN2439565Y (en) * | 2000-06-14 | 2001-07-18 | 冀清发 | Non-contact type coupling |
| CN1715697A (en) * | 2004-06-30 | 2006-01-04 | 山内株式会社 | Torque limitor |
| CN201020689Y (en) * | 2007-04-02 | 2008-02-13 | 王美堂 | Portable power-driven spanner |
-
2010
- 2010-05-21 CN CN 201010180687 patent/CN101870097A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88200763U (en) * | 1988-01-25 | 1988-09-14 | 最优化报社镇江科技开发部 | Magnetic over-load protector |
| CN2439565Y (en) * | 2000-06-14 | 2001-07-18 | 冀清发 | Non-contact type coupling |
| CN1715697A (en) * | 2004-06-30 | 2006-01-04 | 山内株式会社 | Torque limitor |
| CN201020689Y (en) * | 2007-04-02 | 2008-02-13 | 王美堂 | Portable power-driven spanner |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103442853A (en) * | 2011-03-18 | 2013-12-11 | 阿特拉斯·科普柯工业技术公司 | Method for tightening screw joints with a hand held power tool |
| CN105666394A (en) * | 2015-12-31 | 2016-06-15 | 宁波中旺工具有限公司 | Electric screw driver |
| CN106499746A (en) * | 2016-12-05 | 2017-03-15 | 柳州煜华科技有限公司 | A kind of magnetic gear |
| CN106499746B (en) * | 2016-12-05 | 2019-01-04 | 柳州煜华科技有限公司 | A kind of magnetic gear |
| CN106695647B (en) * | 2017-02-06 | 2018-08-10 | 苏州全丰精密机械有限公司 | Synchronize the load electric screw driver that tests the speed |
| CN106695647A (en) * | 2017-02-06 | 2017-05-24 | 苏州全丰精密机械有限公司 | Electric screwdriver for synchronously measuring speed and load |
| CN106625371B (en) * | 2017-02-06 | 2018-08-10 | 苏州全丰精密机械有限公司 | Dipulse feeds back electric screw driver |
| CN106584342B (en) * | 2017-02-06 | 2018-08-10 | 苏州全丰精密机械有限公司 | Magnetic shaft coupling electric screw driver |
| CN106625371A (en) * | 2017-02-06 | 2017-05-10 | 苏州全丰精密机械有限公司 | Double-pulse feedback type electric screwdriver |
| CN106584342A (en) * | 2017-02-06 | 2017-04-26 | 苏州全丰精密机械有限公司 | Magnetic coupling electric screwdriver |
| CN106655618A (en) * | 2017-02-06 | 2017-05-10 | 苏州全丰精密机械有限公司 | Magnetic coupling electric screwdriver load testing device |
| US11569725B2 (en) | 2017-09-26 | 2023-01-31 | Panasonic Intellectual Property Management Co., Ltd. | Power tool with clutch and magnetic torque transmission mechanism |
| CN111148603B (en) * | 2017-09-26 | 2023-04-04 | 松下知识产权经营株式会社 | Electric tool |
| CN111148603A (en) * | 2017-09-26 | 2020-05-12 | 松下知识产权经营株式会社 | Electric tool |
| CN107717825B (en) * | 2017-11-14 | 2019-09-06 | 徐先平 | A kind of controllable spanner of automobile production manufacture gas type |
| CN107717825A (en) * | 2017-11-14 | 2018-02-23 | 王传江 | A kind of controllable spanner of automobile production manufacture gas type |
| CN108942768B (en) * | 2018-09-05 | 2020-04-07 | 上海运征机电科技有限公司 | Small-size direct current striking formula electric spanner |
| CN108942768A (en) * | 2018-09-05 | 2018-12-07 | 上海运征机电科技有限公司 | A kind of small-sized DC bumping electric spanner |
| CN109514487A (en) * | 2018-12-16 | 2019-03-26 | 广东星联精密机械有限公司 | A kind of workpiece rapid disassembling device |
| CN109514487B (en) * | 2018-12-16 | 2023-08-29 | 广东星联精密机械有限公司 | Quick disassembling device for workpiece |
| CN113685404B (en) * | 2020-05-19 | 2022-05-31 | 华为技术有限公司 | Pressing device |
| CN113685404A (en) * | 2020-05-19 | 2021-11-23 | 华为技术有限公司 | Pressing device |
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Application publication date: 20101027 |