CN101837577A - Automatic clutch device in electric screwdriver - Google Patents
Automatic clutch device in electric screwdriver Download PDFInfo
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- CN101837577A CN101837577A CN 201010205536 CN201010205536A CN101837577A CN 101837577 A CN101837577 A CN 101837577A CN 201010205536 CN201010205536 CN 201010205536 CN 201010205536 A CN201010205536 A CN 201010205536A CN 101837577 A CN101837577 A CN 101837577A
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- stall
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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 existing electric screw driver mostly is that the driven by motor driving shaft directly connects power transmission shaft and cutter head assembly; 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; at this moment; motor also continues to drive power transmission shaft and cutter head assembly rotation; like this; the turn-back power that forms easily makes transmission component and motor cause damage; in view of this, how between the cutter head assembly of electric screw driver and motor a kind of automatic clutch device protection of design become technical problem to be solved arranged.
Summary of the invention
Purpose of the present invention is exactly to be provided at novel structure in a kind of electric screw driver, compact small and exquisite automatic clutch device at the deficiencies in the prior art part.
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 by transmission device, 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 of the valve jacket assembly one or more parts is fixedlyed connected with clutch bowl, in the cavity of valve jacket assembly, be equiped with the transmission pearl respectively, power transmission shaft, thrust bearing, spring base, torque spring, 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, eccentric position on the flanged plate of the power transmission shaft other end has through hole, described transmission pearl diameter greater than the degree of depth of through hole less than the diameter of through hole, described 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 finishing, 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.
Described 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, 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.
Described 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, one end of cam spring supports and is located on the torsion adjusting tube inwall, 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 installing hole on the clutch bowl.
Bearing also is housed between described clutch bowl and driving shaft.
On described transmission pearl is steel ball.
After adopting said structure, the present invention has increased arrangement of clutch in electric screw driver, stir the transmission pearl by the stall cam and drive the power transmission shaft rotation, when screw rotate in place, cutter head and power transmission shaft can be subjected to turn-back power, at this moment, the stall cam is compressed into the transmission pearl through hole of one end flanges plate of power transmission shaft, the transmission pearl is being with spring base to move axially, trigger microswitch, make the motor outage and stop operating, realized the automatic clutch function, in addition, the present invention can carry out the torsion adjusting to the valve jacket assembly according to the size of the actual twisting resistance of stall cam.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 by transmission device, 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 of valve jacket assembly 80 one or more parts is fixedlyed connected with clutch bowl 20, in the cavity of valve jacket assembly 80, be equiped with transmission pearl 40 respectively, power transmission shaft 50, thrust bearing 60, spring base 70, torque spring 90, 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, eccentric position on the flanged plate 51 of power transmission shaft 50 other ends has through hole 52, described transmission pearl 40 diameters greater than the degree of depth of through hole 52 less than the diameter of through hole 52, described 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 finishing, power transmission shaft 50 and transmission pearl 40 stop operating, 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.
Described 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, during assembling, round nut 82 and torsion adjustable ring 83 are threaded in torsion respectively and regulate on the end of thread of tube 81 to regulate the elastic force of torque spring 90.
Described 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, one end of cam spring 110 supports and is located on torsion adjusting tube 81 inwalls, 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 installing hole on the clutch bowl 20.
Between described clutch bowl 20 and driving shaft 10, bearing 120 is housed also.
On described transmission pearl 40 is steel ball.
During use, motor drives driving shaft 10 by transmission device and rotates in clutch bowl 20, 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 is subjected to the compressing of torsionspring 90 elastic force of thrust bearing 60, the front end of rotation 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 stall drive block 31 drive transmission pearls 40 and power transmission shaft 50 is rotated together, and transmission pearl 40 rear ends are pressed on the thrust bearing 60 rotate, be installed on the power transmission shaft 50 cutter head assembly and screw is installed automatically screwed thereby drive;
When screw is in place, cutter head and power transmission shaft 50 can be subjected to 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, drive the elastic force axial displacement together that ring set 130 overcomes cam spring 110, stall jacking block 140 is separated with microswitch 100, thereby disconnect 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, the end of thread on torsion adjusting tube 81 is regulated fixing with torsion adjustable ring 83 and round nut 82, the elastic force that makes torque spring 90 is corresponding with the twisting resistance of stall cam 30 outputs, 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 it is small and exquisite that electric screw jet blade attaching/detaching apparatus of the present invention has the novel structure compactness, uses characteristics simple, easy accessibility.
Claims (5)
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 by transmission device, 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 of the valve jacket assembly one or more parts is fixedlyed connected with clutch bowl, in the cavity of valve jacket assembly, be equiped with the transmission pearl respectively, power transmission shaft, thrust bearing, spring base, torque spring, 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, eccentric position on the flanged plate of the power transmission shaft other end has through hole, described transmission pearl diameter greater than the degree of depth of through hole less than the diameter of through hole, described 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 finishing, 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.
2. the automatic clutch device in a kind of electric screw driver according to claim 1, it is characterized in that: described 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, 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.
3. the automatic clutch device in a kind of electric screw driver according to claim 2, it is characterized in that: described 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, one end of cam spring supports and is located on the torsion adjusting tube inwall, 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 installing hole on the clutch bowl.
4. according to the automatic clutch device in each described a kind of electric screw driver of claim 1-3, it is characterized in that: bearing also is housed between described clutch bowl and driving shaft.
5. according to the automatic clutch device in each described a kind of electric screw driver of claim 1-3, it is characterized in that: on described transmission pearl is 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 true CN101837577A (en) | 2010-09-22 |
| CN101837577B CN101837577B (en) | 2012-05-09 |
Family
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) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102407518A (en) * | 2010-09-25 | 2012-04-11 | 陈河田 | Clutching structure for screw locking tool |
| CN103722520A (en) * | 2014-01-10 | 2014-04-16 | 张奉江 | Ball type torsion clutch type electric tool |
| CN117798473A (en) * | 2024-02-29 | 2024-04-02 | 广东福维德焊接股份有限公司 | Non-consumable electrode rotary welding gun |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61270080A (en) * | 1985-05-24 | 1986-11-29 | 戸津 勝行 | 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 |
| JP2004314206A (en) * | 2003-04-14 | 2004-11-11 | Makita Corp | Electric screwdriver |
| CN1852789A (en) * | 2003-08-12 | 2006-10-25 | 日东工器株式会社 | Electric driver |
-
2010
- 2010-06-22 CN CN2010102055369A patent/CN101837577B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61270080A (en) * | 1985-05-24 | 1986-11-29 | 戸津 勝行 | 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 |
| JP2004314206A (en) * | 2003-04-14 | 2004-11-11 | Makita Corp | Electric screwdriver |
| CN1852789A (en) * | 2003-08-12 | 2006-10-25 | 日东工器株式会社 | Electric driver |
Cited By (6)
| 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 |
| CN103722520A (en) * | 2014-01-10 | 2014-04-16 | 张奉江 | Ball type torsion clutch type electric tool |
| CN103722520B (en) * | 2014-01-10 | 2016-04-06 | 张奉江 | A kind of Ball type torsion clutch type electric tool |
| CN117798473A (en) * | 2024-02-29 | 2024-04-02 | 广东福维德焊接股份有限公司 | Non-consumable electrode rotary welding gun |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101837577B (en) | 2012-05-09 |
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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 |
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| 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 |
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| 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 |