CN105415266A - Medical electric torque screwdriver - Google Patents
Medical electric torque screwdriver Download PDFInfo
- Publication number
- CN105415266A CN105415266A CN201510945224.4A CN201510945224A CN105415266A CN 105415266 A CN105415266 A CN 105415266A CN 201510945224 A CN201510945224 A CN 201510945224A CN 105415266 A CN105415266 A CN 105415266A
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- CN
- China
- Prior art keywords
- barrel
- torque
- spring
- steel ball
- decelerator
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
- B25B21/002—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose for special purposes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Abstract
The invention discloses a medical electric torque screwdriver. The medical electric torque screwdriver comprises a barrel-shaped bracket, a driving motor and a speed reducer which are arranged in a housing, wherein a speed reducer housing can axially rotate in the barrel-shaped bracket. The medical electric torque screwdriver further comprises a ball-column clutching mechanism, wherein the ball-column clutching mechanism mainly comprises a spring, a spring sleeve, a pressing sleeve, a constant-torque cap screwing nut, a steel ball and a rolling column; the spring sleeve is fixed to the barrel-shaped bracket; the spring is positioned between the pressing sleeve and the constant-torque cap screwing nut; the constant-torque cap screwing nut is screwed at the front end of the spring sleeve; the rolling column is positioned into a limiting groove in the end surface of the speed reducer housing; the steel ball is positioned into a circular hole in the barrel bottom of the barrel-shaped bracket; a convex edge of the pressing sleeve is pressed on the steel ball. With the adoption of the medical electric torque screwdriver, the output torque of the speed reducer can be limited, and the working torque value of the screwdriver can be determined; the mechanical clutching function enables that the screwdriver can work within the set torque value and stop while reaching the set torque on the premise that a motor is not powered off. The screwing accuracy of the medical electric torque screwdriver relative to a small fit medical screw is more than 3%, and the working torque value is adjustable.
Description
Technical field
The invention belongs to tightening tool, relate to a kind of bottle opener, particularly a kind of electric torque bottle opener tightened for medical Screw.
Background technology
Along with the development of modern medical service, the required precision that people tighten medical Screw is more and more high, has reached 5% required precision at present.And it is few to be especially applicable to the bottle opener that medical Screw tightens in prior art, the Medical electric bottle opener that rare several external diameter is less than 20mm is not also with moment of torsion to control, and whether screw tightens the full feel by doctor.Because medical Screw material is titanium alloy mostly, material is softer, if moment of torsion is excessive, will inevitably twist bad by " one " word groove of screw or " ten " word groove, causes screw to be difficult to the serious consequence dismantled.Existing Medical electric bottle opener is used very easily to produce this consequence.
Summary of the invention
The object of the invention is to overcome the defect that existing Medical electric bottle opener does not have moment of torsion control, propose the Medical electric torque screwdriver that a kind of output torque can set, stall can control automatically.
The technical scheme realizing above-mentioned purpose is: a kind of Medical electric torque screwdriver, comprise the double shell making handle, be fixed on the barrel-shaped support on outer casing inner wall, be arranged on the drive motors on barrel-shaped support and decelerator, and coupling lever, with case nose lid and the driver bit of coupling lever via hole, the output shaft of decelerator connects with coupling lever rear end through at the bottom of the bucket of barrel-shaped support, coupling lever front end grafting driver bit, decelerator is third-level planetary wheel driven type, the shell of decelerator and the bucket wall matched in clearance of barrel-shaped support and can in staving axial-rotation, it is characterized in that, also comprise a goalpost clutch, described goalpost clutch is primarily of spring, spring spool, gland, fixed twisted box nut, steel ball and roller composition, there is external screw thread described spring spool front end, there is moment of torsion graduation mark in stage casing, the rear end of spring spool is fixed on bead at the bottom of the bucket of barrel-shaped support, described gland is hollow structure, one end is with flange, the end face of described fixed twisted box nut there is the via hole of a coupling lever, spring and gland are arranged in spring spool and are sleeved on coupling lever, spring is between gland and fixed twisted box nut, fixed twisted box nut spinning is on spring spool, the end face of speed reducer housing its output shaft contiguous is provided with a radial roller stopper slot near edge placement, described roller is positioned at this groove, part is exposed at outside groove, a circular hole corresponding with described roller stopper slot position is provided with at the bottom of the bucket of described barrel-shaped support, described steel ball is arranged in this circular hole, the flange of gland is pressed on this steel ball.
Further, described coupling lever, a circle is had to lack shape boss at the bottom of the hole of its front end grafting driver bit, hole root inwall is provided with a screens steel ball, the afterbody of described driver bit has a breach, it is adaptive that this breach and described circle lack shape boss, the root of driver bit have one with the ring shaped slot of described screens steel ball contraposition.
Further, described drive motors is a kind of DC brushless motor, rotating speed 15000r/min.
Further, described drive motors is circumscribed with the controller of power on/off and commutation function.
Further, the via hole of described case nose lid there is " O " RunddichtringO.
Technological core of the present invention is on decelerator, be equipped with a goalpost clutch.Spring in goalpost clutch, the moment of torsion scale on spring spool and fixed twisted box nut are through and detect and supporting.Goalpost clutch is by fixed twisted box nut Compress Spring, and according to the moment of torsion scale that spring spool sets to determine the precession degree of depth of twisted box nut, namely setting spring is to the pressure of steel ball, and then limits the output torque of decelerator, namely determines the operation torque value of bottle opener.After the operation torque value setting of bottle opener, steel ball is squeezed tightly between on the shell end face of decelerator.When bottle opener energising work, if the output torque of decelerator is no more than limit value, the shell of decelerator is stopped by steel ball, and the output shaft rotation of decelerator, implements tightening screw; If the output torque of decelerator has exceeded limit value, the rotation dynamics torsion of speed reducer housing can make steel ball lose and transfer to use to its resistance, when speed reducer housing rotates, and the output shaft then stall of decelerator.This mechanical clutch function of goalpost clutch in the present invention, can realize bottle opener when drive motors not power-off, works in setting torque value, stops when reaching setting moment of torsion.
The present invention limits because there being operation torque value, accurately can control screw-down torque, precision is better than 3%, and operation torque value regulates by surely twisted box nut, therefore, doctor can select adaptive bottle opener according to the specification of medical Screw, or regulate the operation torque value of bottle opener, as long as select suitable or regulate adaptive, just medical Screw be can accurately tighten, " one " the word groove or " ten " word groove that damage Screw more can be prevented.
Accompanying drawing explanation
Fig. 1 is the unitary construction schematic diagram of one embodiment of the invention.
Fig. 2 is the internal structure schematic diagram of middle goalpost clutch embodiment illustrated in fig. 1.
Fig. 3 is before the setting of bottle opener operation torque value and when the output torque of decelerator is greater than bottle opener operation torque value, the relative position schematic diagram of steel ball and roller.
Fig. 4 is after the setting of bottle opener operation torque value and when the output torque of decelerator is less than bottle opener operation torque value, the relative position schematic diagram of steel ball and roller.
Fig. 5 is the organigram of middle coupling lever embodiment illustrated in fig. 1.
In figure: 1. driver bit, 2. coupling lever, 3. case nose lid, 4. goalpost clutch, 5. decelerator, 6. drive motors, 7. socket, 8. shell, 9. barrel-shaped support, 201. boss, 202. screens steel balls, 301. sealing rings, 401. fixed twisted box nuts, 402. springs, 403. spring spools, 404. glands, 405. steel balls, 406. rollers.
Detailed description of the invention
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, the present invention includes and doublely do the shell 8 of handle, the barrel-shaped support 9 be fixed on shell 8 inwall, be arranged on drive motors 6 on barrel-shaped support 9 and decelerator 5, and coupling lever 2, with the case nose lid 3 of coupling lever via hole and driver bit 1, the output shaft of decelerator 5 connects with the rear end of coupling lever 2 through at the bottom of the bucket of barrel-shaped support 9, coupling lever 2 front end grafting driver bit 1, decelerator 5 is third-level planetary wheel driven type, the shell of decelerator 5 and the bucket wall matched in clearance of barrel-shaped support 9 also can in staving axial-rotation.Drive motors 6 is fixedly mounted on barrel-shaped support 9, and socket 7 is arranged on the tail end of shell 8, and socket 7 one end is electrically connected with drive motors 6, and the other end is connected with the controller with power on/off and commutation function.The present invention also comprises a goalpost clutch 4.
As shown in Figure 1, 2, goalpost clutch 4 forms primarily of spring 402, spring spool 403, gland 404, fixed twisted box nut 401, steel ball 405 and roller 406.There is external screw thread spring spool 403 front end, and there is moment of torsion graduation mark in stage casing, and the rear end of spring spool 403 is fixed on bead at the bottom of the bucket of barrel-shaped support 9; Gland 404 is hollow structure, and one end is with flange; The end face of fixed twisted box nut 401 there is the via hole of a coupling lever 2, spring 402 and gland 404 are arranged in spring spool 403 and are sleeved on coupling lever 2, spring 402 one end is enclosed within gland 404, the other end is compressed by surely twisted box nut 401, and fixed twisted box nut 401 spinning is on spring spool 403; The end face of the shell of decelerator 5 its output shaft contiguous is provided with a radial roller stopper slot near edge placement, and roller 406 is positioned at this groove, roller 406 some be exposed at outside groove; Be provided with a circular hole corresponding with roller stopper slot position at the bottom of the bucket of barrel-shaped support 9, steel ball 405 is arranged in this circular hole, and the flange of gland 404 is pressed on steel ball 405.
Spring 402 in goalpost clutch 4, the moment of torsion scale on spring spool 403 and fixed twisted box nut 401 are after testing and supporting.By the precession degree of depth of surely twisted box nut 401, the output torque of decelerator can be set, namely determine the operation torque value of bottle opener.
During setting moment of torsion, the fixed twisted box nut 401 of dextrorotation, Compress Spring 402, and then extruding gland 404, gland 404 again and then extruding steel ball 405, makes steel ball 405 be squeezed tightly between on the shell end face of decelerator 5.When fixed twisted box nut 401 right side of precession is with when overlapping with a certain graduation mark on the spring spool 403 of moment of torsion graduation mark, namely the operation torque value setting of this electric torque bottle opener is completed, this operation torque value is tighten the standard torque of medical Screw, and the standard torque of medical Screw can obtain from relevant criterion.
Operation principle of the present invention: when drive motors 6 is energized, decelerator 5 is driven, because decelerator 5 is connected by gears meshing with drive motors 6, the shell of decelerator 5 axially can rotate freely in the staving of barrel-shaped support 9 simultaneously, so decelerator 5 is to there be output, the resistance of the shell of decelerator 5 must be turned, not so the power of drive motors 6 only can make the shell of decelerator 5 rotate, and the output shaft of decelerator 5 can not be driven to rotate, (the similar torque multiplier of this principle, normally work to multiplier, counter-force arm must be had the multiplier shell resistance with internal tooth to be turned).Because steel ball 405 is tightly pressed on the shell end face of decelerator 5 by spring 402, steel ball 405 stops the shell with the decelerator 5 of roller 406 to rotate (as shown in Figure 5), namely serve resistance and transfer to use, now, the output shaft of decelerator 5 rotates, and then driving coupling lever 2 to rotate, shaft coupling 2 drives driver bit 1 to rotate, and implements tightening screw.When the moment of torsion that decelerator 5 transmits is greater than the torque value of setting, namely decelerator 5 transmitting torque is greater than steel ball 405 when hindering torque, steel ball 405 is extruded (as shown in Figure 4) by roller 406 in circular hole, because the turning moment of decelerator 5 shell is greater than setting moment of torsion, the torsion of decelerator 5 shell can make steel ball 405 lose and transfer to use to its resistance, although so the shell of decelerator 5 is hindered, it still can rotate with roller 406, and the output shaft stall of now decelerator 5.Here it is, and goalpost clutch 4 can realize the principle of mechanical clutch function, i.e. drive motors 6 not power-off, and when reaching setting moment of torsion, decelerator 5 stops normal output, and shaft coupling 2 also stops the rotation, driver bit 1 stall.
In the present invention, the maximum outside diameter of shell 8 is less than 20mm; Drive motors 6 is a kind of DC brushless motors.In the present embodiment, the outside dimension of drive motors 6 is 18mm, rotating speed 15000r/min; The speed reducing ratio of decelerator 5 is 125: 1.
As shown in Figure 2, in the present embodiment, a circle is had to lack shape boss 201 at the bottom of the hole of coupling lever 2 front end grafting driver bit, hole root inwall is provided with a screens steel ball 202, the afterbody of driver bit 1 has a breach, this breach and boss 201 are adaptive, the root of driver bit 1 have one with the ring shaped slot of screens steel ball 202 contraposition.The via hole of case nose lid there is " O " RunddichtringO 301, water proof and dust proof.
The operation torque value of bottle opener regulates by surely twisted box nut 401.During adjustment, desheathing drive end bearing bracket 3, dextrorotation or left-handed fixed twisted box nut 401, make its right side overlap with the selected graduation mark on spring spool 403, then load onto case nose lid 3.
Claims (5)
1. a Medical electric torque screwdriver, comprise the double shell making handle, be fixed on the barrel-shaped support on outer casing inner wall, be arranged on the drive motors on barrel-shaped support and decelerator, and coupling lever, with case nose lid and the driver bit of coupling lever via hole, the output shaft of decelerator connects with coupling lever rear end through at the bottom of the bucket of barrel-shaped support, coupling lever front end grafting driver bit, decelerator is third-level planetary wheel driven type, the shell of decelerator and the bucket wall matched in clearance of barrel-shaped support and can in staving axial-rotation, it is characterized in that: also comprise a goalpost clutch,
Described goalpost clutch is primarily of spring, spring spool, gland, fixed twisted box nut, steel ball and roller composition, there is external screw thread described spring spool front end, there is moment of torsion graduation mark in stage casing, the rear end of spring spool is fixed on bead at the bottom of the bucket of barrel-shaped support, described gland is hollow structure, one end is with flange, the end face of described fixed twisted box nut there is the via hole of a coupling lever, spring and gland are arranged in spring spool and are sleeved on coupling lever, spring is between gland and fixed twisted box nut, fixed twisted box nut spinning is on spring spool, the end face of speed reducer housing its output shaft contiguous is provided with a radial roller stopper slot near edge placement, described roller is positioned at this groove, part is exposed at outside groove, a circular hole corresponding with described roller stopper slot position is provided with at the bottom of the bucket of described barrel-shaped support, described steel ball is arranged in this circular hole, the flange of gland is pressed on this steel ball.
2. according to Medical electric torque screwdriver according to claim 1, it is characterized in that: described coupling lever, a circle is had to lack shape boss at the bottom of the hole of its front end grafting driver bit, hole root inwall is provided with a screens steel ball, the afterbody of described driver bit has a breach, it is adaptive that this breach and described circle lack shape boss, the root of driver bit have one with the ring shaped slot of described screens steel ball contraposition.
3. according to Medical electric torque screwdriver according to claim 1, it is characterized in that: described drive motors is a kind of DC brushless motor, rotating speed 15000r/min.
4., according to the Medical electric torque screwdriver described in claim 1 or 3, it is characterized in that:, described drive motors is circumscribed with the controller of power on/off and commutation function.
5. according to Medical electric torque screwdriver according to claim 1, it is characterized in that: the via hole of described case nose lid has " O " RunddichtringO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510945224.4A CN105415266A (en) | 2015-12-11 | 2015-12-11 | Medical electric torque screwdriver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510945224.4A CN105415266A (en) | 2015-12-11 | 2015-12-11 | Medical electric torque screwdriver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105415266A true CN105415266A (en) | 2016-03-23 |
Family
ID=55494026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510945224.4A Pending CN105415266A (en) | 2015-12-11 | 2015-12-11 | Medical electric torque screwdriver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105415266A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597914A (en) * | 2018-06-06 | 2018-09-28 | 吴跃文 | A kind of impregnation mechanism |
| CN109046066A (en) * | 2018-08-21 | 2018-12-21 | 江苏甬金金属科技有限公司 | A kind of structure for preventing impeller to be eccentrically rotated |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2174300Y (en) * | 1993-09-02 | 1994-08-17 | 辛富荣 | Clutch for electric screwdriver |
| JPH06254775A (en) * | 1993-03-01 | 1994-09-13 | Katsuyuki Totsu | Power rotary tool having torque detection and automatic stopping mechanism |
| WO1998003311A1 (en) * | 1996-07-18 | 1998-01-29 | Katsuyuki Totsu | Electric rotary tool with built-in recoilles clutch mechanism |
| JP2005238418A (en) * | 2004-02-27 | 2005-09-08 | Katsuyuki Totsu | Electric screw driver having torque detecting function, and torque control system using electric screw driver having torque detecting function |
| CN201304628Y (en) * | 2008-10-23 | 2009-09-09 | 美之岚机械工业有限公司 | Brushless electric screwdriver braking mechanism |
| CN205254876U (en) * | 2015-12-11 | 2016-05-25 | 陕西东方航空仪表有限责任公司 | Medical electronic moment of torsion bottle opener |
-
2015
- 2015-12-11 CN CN201510945224.4A patent/CN105415266A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06254775A (en) * | 1993-03-01 | 1994-09-13 | Katsuyuki Totsu | Power rotary tool having torque detection and automatic stopping mechanism |
| CN2174300Y (en) * | 1993-09-02 | 1994-08-17 | 辛富荣 | Clutch for electric screwdriver |
| WO1998003311A1 (en) * | 1996-07-18 | 1998-01-29 | Katsuyuki Totsu | Electric rotary tool with built-in recoilles clutch mechanism |
| JP2005238418A (en) * | 2004-02-27 | 2005-09-08 | Katsuyuki Totsu | Electric screw driver having torque detecting function, and torque control system using electric screw driver having torque detecting function |
| CN201304628Y (en) * | 2008-10-23 | 2009-09-09 | 美之岚机械工业有限公司 | Brushless electric screwdriver braking mechanism |
| CN205254876U (en) * | 2015-12-11 | 2016-05-25 | 陕西东方航空仪表有限责任公司 | Medical electronic moment of torsion bottle opener |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597914A (en) * | 2018-06-06 | 2018-09-28 | 吴跃文 | A kind of impregnation mechanism |
| CN108597914B (en) * | 2018-06-06 | 2024-03-29 | 吴跃文 | Impregnation mechanism |
| CN109046066A (en) * | 2018-08-21 | 2018-12-21 | 江苏甬金金属科技有限公司 | A kind of structure for preventing impeller to be eccentrically rotated |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160323 |
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| WD01 | Invention patent application deemed withdrawn after publication |