CN101837577B - Automatic clutch device in electric screwdriver - Google Patents
Automatic clutch device in electric screwdriver Download PDFInfo
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- CN101837577B CN101837577B CN2010102055369A CN201010205536A CN101837577B CN 101837577 B CN101837577 B CN 101837577B CN 2010102055369 A CN2010102055369 A CN 2010102055369A CN 201010205536 A CN201010205536 A CN 201010205536A CN 101837577 B CN101837577 B CN 101837577B
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- stall
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- transmission shaft
- spring base
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Abstract
The invention relates to the technical field of the electric tool, in particular to an automatic clutch device in an electric screwdriver. A clutch device is added in an electric screwdriver, a transmission ball is stirred by a stalling cam to drive a transmission shaft to rotate, when a screw rotates in place, a tool bit and the transmission shaft are suffered a counter twisting force, so the stalling cam compresses the transmission ball into a through hole of a flange plate on one end of the transmission shaft, the transmission ball drives a spring seat to move in the axial direction so as to trigger a micro switch, a motor is powered off and stops rotation, and the automatic clutch function is realized. In addition, the twisting force of a shell jacket component can be adjusted according to the real twisting force of the stalling cam, so the transmission ball can be successfully put by a stalling drive block on the stalling cam into the through hole. The automatic clutch device overcomes the weakness that after unscrewing the screw, the present electronic screwdriver cannot be automatically stopped and is easy to damage, and has the advantages of ingenious and compact structure, convenient application and automatic clutch.
Description
Technical field
The present invention relates to the electric tool technical field, refer in particular to the automatic clutch device in a kind of electric screw driver.
Background technology
The structure of prior electric screwdriver mostly is that the driven by motor driving shaft directly connects power transmission shaft and cutter head assembly, and the centre does not have arrangement of clutch, during use; When screw turns puts in place; Cutter head is blocked and can't rotate by screw, and at this moment, motor also continues to drive power transmission shaft and cutter head assembly rotation; Like this; The turn-back power that forms is prone to make transmission component and motor to cause damage, and in view of this, how between the cutter head assembly of electric screw driver and motor, designing a kind of automatic clutch device protection becomes technical problem to be solved is arranged.
Summary of the invention
The object of the invention is exactly the automatic clutch device that is provided at novel structure, compact in a kind of electric screw driver to the weak point of prior art.
For achieving the above object; Technical scheme of the present invention is: the automatic clutch device in a kind of electric screw driver; Include: driving shaft, clutch bowl, stall cam, transmission pearl, power transmission shaft, thrust bearing, spring base, valve jacket assembly, torque spring, microswitch; Driving shaft is installed in the clutch bowl; The rear end of driving shaft is connected with motor output shaft through transmission device, and the front end of driving shaft is fixedly connected with the stall cam, and the end face eccentric position of stall cam forms the stall drive block; The link that is made up of the valve jacket assembly one or more parts is fixedly connected with clutch bowl; In the cavity of valve jacket assembly, be equiped with transmission pearl, power transmission shaft, thrust bearing, spring base, torque spring respectively; Power transmission shaft is T font tube-in-tube structure; The external part of power transmission shaft is connected with cutter head assembly and stretches out outside the valve jacket assembly, and the eccentric position on the flanged plate of the power transmission shaft other end has through hole, said transmission pearl diameter greater than the degree of depth of through hole less than the diameter of through hole; Said transmission pearl is fastened in this through hole, and the eccentric position at through hole place is corresponding with the eccentric position of stall drive block; On power transmission shaft, be socketed with spring base and thrust bearing; Thrust bearing axially is movably set between the flanged plate and spring base of the power transmission shaft other end; And thrust bearing one end face be pressed on flanged plate on through hole in the rear end of transmission pearl; One end of the torque spring after the compression supports and is located on the spring base, and the other end of torque spring supports and is located on the inwall of valve jacket assembly; The microswitch that is electrically connected with motor and spring base be directly or indirectly corresponding to be contacted and makes the on off operating mode of spring base change microswitch when axial displacement; When operate as normal screws screw; Stall drive block side in the rotation is stuck in to stretch out with the transmission pearl and makes on the front end of through hole the transmission pearl drive power transmission shaft to rotate that microswitch is in on-state; Screw screws when accomplishing; Power transmission shaft and transmission pearl stop operating; The stall drive block heads on the elastic force axial displacement that thrust bearing and spring base overcome torque spring with the drag on rear end that makes the transmission pearl in the through hole of transmission pearl, and the spring base axially-movable makes microswitch be in off-state.
Said valve jacket assembly includes torsion and regulates tube, torsion adjustable ring and round nut; Torsion is regulated fixedly sleeved being fixed on the clutch bowl of an end of tube; The other end that torsion is regulated tube is the end of thread; Torsion is regulated and is also had corresponding screw thread on the tube, and during assembling, round nut and torsion adjustable ring are threaded in torsion respectively and regulate on the end of thread of tube to regulate the elastic force of torque spring.
Said microswitch is fixed on the clutch bowl; Between spring base and microswitch, be equipped with stall jacking block, ring set, cam spring; Ring set engages with the spring base socket, and an end of cam spring supports and is located on the torsion adjusting tube inwall, and the other end of cam spring supports and is located on the ring set; The ring set other end is against on the stall jacking block, and the stall jacking block was conflicted on microswitch after wearing the installing hole on the clutch bowl.
Bearing also is housed between said clutch bowl and driving shaft.
On said transmission pearl is steel ball.
After adopting said structure, the present invention has increased arrangement of clutch in electric screw driver, stirs the transmission pearl through the stall cam and drives the power transmission shaft rotation; When screw rotate in place, cutter head and power transmission shaft can receive turn-back power, at this moment; The stall cam is compressed into the through hole of an end flanges plate of power transmission shaft with the transmission pearl, and the transmission pearl is being with spring base to move axially, and triggers microswitch; Make motor outage and stop operating; Realized the automatic clutch function, in addition, the present invention can carry out torsion to the valve jacket assembly according to the size of the actual twisting resistance of stall cam and regulate.Hence one can see that, and the present invention has overcome can't stop flimsy deficiency after existing ELECTRONIC SCREWS cutter has been twisted screw automatically, has the advantages that structure is ingenious, compact, easy to use, can realize automatic clutch.
Description of drawings
Fig. 1 is the three-dimensional exploded view of the arrangement of clutch of electric screw driver of the present invention.
The sectional structure chart of Fig. 2 during for the assembling of the arrangement of clutch of electric screw driver of the present invention.
The specific embodiment
Shown in Fig. 1-2; The present invention includes: the automatic clutch device in a kind of electric screw driver; Include: driving shaft 10, clutch bowl 20, stall cam 30, transmission pearl 40, power transmission shaft 50, thrust bearing 60, spring base 70, valve jacket assembly 80, torque spring 90, microswitch 100; Driving shaft 10 is installed in the clutch bowl 20; The rear end of driving shaft 10 is connected with motor output shaft through transmission device, and the front end of driving shaft 10 is fixedly connected with stall cam 30, and the end face eccentric position of stall cam 30 forms stall drive block 31; The link that is made up of valve jacket assembly 80 one or more parts is fixedly connected with clutch bowl 20; In the cavity of valve jacket assembly 80, be equiped with transmission pearl 40, power transmission shaft 50, thrust bearing 60, spring base 70, torque spring 90 respectively; Power transmission shaft 50 is T font tube-in-tube structure; The external part of power transmission shaft 50 is connected with cutter head assembly and stretches out outside the valve jacket assembly 80, and the eccentric position on the flanged plate 51 of power transmission shaft 50 other ends has through hole 52, said transmission pearl 40 diameters greater than the degree of depth of through hole 52 less than the diameter of through hole 52; Said transmission pearl 40 is fastened in this through hole 52, and the eccentric position at through hole 52 places is corresponding with the eccentric position of stall drive block 31; On power transmission shaft 50, be socketed with spring base 70 and thrust bearing 60; Thrust bearing 60 axially is movably set between the flanged plate 51 and spring base 70 of power transmission shaft 50 other ends; And thrust bearing 60 1 end faces be pressed on flanged plate 51 on through hole 52 in the rear end of transmission pearl 40; One end of the torque spring 90 after the compression supports and is located on the spring base 70, and the other end of torque spring 90 supports and is located on the inwall of valve jacket assembly 80; The microswitch 100 that is electrically connected with motor and spring base 70 be directly or indirectly corresponding to be contacted and makes the on off operating mode of spring base 70 change microswitch 100 when axial displacement; When operate as normal screws screw; Stall drive block 31 sides in the rotation are stuck in to stretch out with transmission pearl 40 and make on the front end of through hole 51 transmission pearl 40 drive power transmission shafts 50 to rotate that microswitch 100 is in on-state; Screw screws when accomplishing; Power transmission shaft 50 stops operating with transmission pearl 40; Stall drive block 31 heads on the elastic force axial displacement that thrust bearing 60 and spring base 70 overcome torque spring 90 with the drag on rear end that makes transmission pearl 40 in the through hole 51 of transmission pearl 40, and spring base 70 axially-movables make microswitch 100 be in off-state.
Said valve jacket assembly 80 includes torsion and regulates tube 81, torsion adjustable ring 82 and round nut 83; Torsion is regulated fixedly sleeved being fixed on the clutch bowl 20 of an end of tube 81; The other end that torsion is regulated tube 81 is the end of thread; Torsion is regulated and is also had corresponding screw thread on the tube 81, and during assembling, round nut 82 is threaded in torsion respectively with torsion adjustable ring 83 and regulates on the end of thread of tube 81 to regulate the elastic force of torque spring 90.
Said microswitch 100 is fixed on the clutch bowl 20; Between spring base 70 and microswitch 100, be equipped with stall jacking block 140, ring set 130, cam spring 110; Ring set 130 engages with spring base 70 sockets, and an end of cam spring 110 supports and is located on torsion adjusting tube 81 inwalls, and the other end of cam spring 110 supports and is located on the ring set 130; The other end of ring set 130 is against on the stall jacking block 140, and stall jacking block 140 was conflicted on microswitch 100 after wearing the installing hole on the clutch bowl 20.
Between said clutch bowl 20 and driving shaft 10, bearing 120 is housed also.
On said transmission pearl 40 is steel ball.
During use, motor drives driving shaft 10 through transmission device and in clutch bowl 20, rotates, and bearing 120 is housed between clutch bowl 20 and the driving shaft 10 makes driving shaft 10 rotations smooth and easy; Driving shaft 10 drives stall cam 30 and rotates together; Because the rear end of the rotation pearl 40 in the through hole 52 on the flanged plate 51 of power transmission shaft 50 receives the compressing of torsionspring 90 elastic force of thrust bearing 60; The front end that rotates pearl 40 stretches out the through hole 52 on the flanged plate 51; And it is corresponding staggered with the stall drive block 31 on the stall cam 30; Stall cam 30 rotates and makes stall drive block 31 drive transmission pearls 40 to rotate together with power transmission shaft 50, and transmission pearl 40 rear ends is pressed on the thrust bearing 60 rotate, and screw is installed is automatically screwed thereby drive is installed on the power transmission shaft 50 cutter head assembly;
When screw was in place, cutter head and power transmission shaft 50 can receive turn-back power and stop operating, at this moment; The elastic force that the twisting resistance of stall cam 30 makes stall drive block 31 overcome torsionspring 90 is compressed into transmission pearl 40 through hole 52 of an end flanges plate 51 of power transmission shaft 50; Transmission pearl 40 is being with spring base 70 to move axially, and drives the elastic force axial displacement together that ring set 130 overcomes cam spring 110, and stall jacking block 140 is separated with microswitch 100; Thereby break off the power supply circuits of motor; Make the motor stall, realized the automatic clutch function, in addition; The present invention can carry out torsion to valve jacket assembly 80 according to the size of stall cam 30 actual twisting resistances and regulate; Torsion adjustable ring 83 and round nut 82 are regulated the end of thread on the tube 81 at torsion regulate fixingly, the elastic force that makes torque spring 90 is corresponding with the twisting resistance that stall cam 30 is exported, thereby makes the transmission pearl 40 can be by the through hole of dragging on smoothly of the stall drive block 31 on the stall cam 30.
Hence one can see that, and electric screw jet blade attaching/detaching apparatus of the present invention has the novel structure compact, uses characteristics simple, easy accessibility.
Claims (4)
1. the automatic clutch device in the electric screw driver; It is characterized in that: include: driving shaft, clutch bowl, stall cam, transmission pearl, power transmission shaft, thrust bearing, spring base, valve jacket assembly, torque spring, microswitch; Driving shaft is installed in the clutch bowl; The rear end of driving shaft is connected with motor output shaft through transmission device, and the front end of driving shaft is fixedly connected with the stall cam, and the end face eccentric position of stall cam forms the stall drive block; The link that is made up of the valve jacket assembly one or more parts is fixedly connected with clutch bowl; In the cavity of valve jacket assembly, be equiped with transmission pearl, power transmission shaft, thrust bearing, spring base, torque spring respectively; Power transmission shaft is T font tube-in-tube structure; The external part of power transmission shaft is connected with cutter head assembly and stretches out outside the valve jacket assembly, and the eccentric position on the flanged plate of the power transmission shaft other end has through hole, said transmission pearl diameter greater than the degree of depth of through hole less than the diameter of through hole; Said transmission pearl is fastened in this through hole, and the eccentric position at through hole place is corresponding with the eccentric position of stall drive block; On power transmission shaft, be socketed with spring base and thrust bearing; Thrust bearing axially is movably set between the flanged plate and spring base of the power transmission shaft other end; And thrust bearing one end face be pressed on flanged plate on through hole in the rear end of transmission pearl; One end of the torque spring after the compression supports and is located on the spring base, and the other end of torque spring supports and is located on the inwall of valve jacket assembly; The microswitch that is electrically connected with motor and spring base be directly or indirectly corresponding to be contacted and makes the on off operating mode of spring base change microswitch when axial displacement; When operate as normal screws screw; Stall drive block side in the rotation is stuck in to stretch out with the transmission pearl and makes on the front end of through hole the transmission pearl drive power transmission shaft to rotate that microswitch is in on-state; Screw screws when accomplishing; Power transmission shaft and transmission pearl stop operating; The stall drive block heads on the elastic force axial displacement that thrust bearing and spring base overcome torque spring with the drag on rear end that makes the transmission pearl in the through hole of transmission pearl, and the spring base axially-movable makes microswitch be in off-state; Said valve jacket assembly includes torsion and regulates tube, torsion adjustable ring and round nut; Torsion is regulated fixedly sleeved being fixed on the clutch bowl of an end of tube; The other end that torsion is regulated tube is the end of thread; Torsion is regulated and is also had corresponding screw thread on the tube, and during assembling, round nut and torsion adjustable ring are threaded in torsion respectively and regulate on the end of thread of tube to regulate the elastic force of torque spring.
2. the automatic clutch device in a kind of electric screw driver according to claim 1; It is characterized in that: said microswitch is fixed on the clutch bowl; Between spring base and microswitch, be equipped with stall jacking block, ring set, cam spring; Ring set engages with the spring base socket, and an end of cam spring supports and is located on the torsion adjusting tube inwall, and the other end of cam spring supports and is located on the ring set; The ring set other end is against on the stall jacking block, and the stall jacking block was conflicted on microswitch after wearing the installing hole on the clutch bowl.
3. the automatic clutch device in a kind of electric screw driver according to claim 2 is characterized in that: bearing also is housed between said clutch bowl and driving shaft.
4. the automatic clutch device in a kind of electric screw driver according to claim 2 is characterized in that: said transmission pearl is a steel ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102055369A CN101837577B (en) | 2010-06-22 | 2010-06-22 | Automatic clutch device in electric screwdriver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102055369A CN101837577B (en) | 2010-06-22 | 2010-06-22 | Automatic clutch device in electric screwdriver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101837577A CN101837577A (en) | 2010-09-22 |
| CN101837577B true CN101837577B (en) | 2012-05-09 |
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ID=42741365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102055369A Expired - Fee Related CN101837577B (en) | 2010-06-22 | 2010-06-22 | Automatic clutch device in electric screwdriver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101837577B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407518A (en) * | 2010-09-25 | 2012-04-11 | 陈河田 | Clutching structure for screw locking tool |
| CN102357858A (en) * | 2011-10-14 | 2012-02-22 | 无锡麦克马丁定扭矩装配工具有限公司 | Electronic air-break type pneumatic tool |
| CN103722520B (en) * | 2014-01-10 | 2016-04-06 | 张奉江 | A kind of Ball type torsion clutch type electric tool |
| CN117798473B (en) * | 2024-02-29 | 2024-06-07 | 广东福维德焊接股份有限公司 | Non-consumable electrode rotary welding gun |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0624711B2 (en) * | 1985-05-24 | 1994-04-06 | 勝行 戸津 | Electric rotary tool |
| US4712456A (en) * | 1986-07-02 | 1987-12-15 | Top Driver Enterprise Co., Ltd. | Electric torsion-controlled screwdriver with an improved automatic turn-off device |
| JP3566737B2 (en) * | 1993-03-23 | 2004-09-15 | 勝行 戸津 | Non-reaction clutch device for electric rotating tools |
| JP4270927B2 (en) * | 2003-04-14 | 2009-06-03 | 株式会社マキタ | Electric screwdriver |
| JP3992667B2 (en) * | 2003-08-12 | 2007-10-17 | 日東工器株式会社 | electric screwdriver |
-
2010
- 2010-06-22 CN CN2010102055369A patent/CN101837577B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101837577A (en) | 2010-09-22 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 7-1306, No. 32, Xinnong Road, high tech Zone, Zhenjiang City, Jiangsu Province Patentee after: Zhang Hui Address before: 518055 building 10, xiliwangtang Industrial Zone, Nanshan District, Shenzhen City, Guangdong Province Patentee before: Zhang Hui |
|
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 518000 building 10, xiliwangtang Industrial Zone, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Zhang Hui Address before: No. 7-1306, No. 32, Xinnong Road, high tech Zone, Zhenjiang City, Jiangsu Province Patentee before: Zhang Hui |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20210622 |