CN103600327A - Electric screw driver with adjustable rotating speed - Google Patents
Electric screw driver with adjustable rotating speed Download PDFInfo
- Publication number
- CN103600327A CN103600327A CN201310431986.3A CN201310431986A CN103600327A CN 103600327 A CN103600327 A CN 103600327A CN 201310431986 A CN201310431986 A CN 201310431986A CN 103600327 A CN103600327 A CN 103600327A
- Authority
- CN
- China
- Prior art keywords
- gear
- sun gear
- screw driver
- electric screw
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- B25B21/008—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with automatic change-over from high speed-low torque mode to low speed-high torque mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/46—Gearings having only two central gears, connected by orbital gears
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/20—Transmissions using gears with orbital motion
- F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
- F16H2200/2007—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with two sets of orbital gears
Abstract
The invention discloses an electric screw driver with an adjustable rotating speed. The electric screw driver is composed of a motor, a combined gear train decelerator and a cutter bar driving shaft, wherein the combined gear train decelerator is located in the middle of the electric screw driver; the motor is mounted behind the combined gear train decelerator; the cutter bar driving shaft is fixed in front of the combined gear train decelerator and is fixedly connected to a cutter bar; the cutter bar is changeable. When an output power of the motor is changeless, the combined gear train is utilized to change force at high rotating speed and low torque output by the motor into force at low rotating speed and great torque so as to be provided to the cutter bar; furthermore, a transmission ratio can be changed in the motor rotation process, gear can be shifted and speed can be changed at any time, and no rigid compact exists among gears during the gear shifting process. According to the practical need, other planetary reducers with fixed transmission ratio used for enlarging a speed change range can be mounted in series between the motor of the electric screw driver and the combined gear train decelerator.
Description
Technical field
The present invention relates to a kind of conventional electric tool, specifically, relate to the adjustable electric screw driver of a kind of rotating speed.
Background technology
Existing electric screw driver is conventionally by motor direct-drive cutter head runner assembly, because motor driving shaft rotating speed is high, moment of torsion is little, and electric screw cutter head needs the power that rotating speed is low, moment of torsion is large to carry out tighten the screws, so, conventionally between the motor of electric screw driver and cutter head runner assembly, add gear train to convert the rotating speed power high, that moment of torsion is little of motor output to rotating speed is low, moment of torsion is large power and drive cutter head runner assembly.Utilize at present electric screw driver that gear train slows down to have the problem of two aspects: the first, for obtaining desirable gearratio, mechanical reduction gear is complex structure often, moment of torsion conversion weak effect; The second, gear-box can only provide fixing gearratio, and electric screw driver can only, with constant speed rotation, can not carry out speed governing; When every day use screwdriver, only at tighten the screws or when just having started to dismantle screw, just need larger torque, required torque is less At All Other Times.
In patent 201020232004, disclose a kind of electric screw driver with planetary gear set speed reduction drive device, the planetary gearsets of its built-in two cover series connection is slowed down, and compact conformation is small and exquisite, and moment of torsion conversion is effective; But this electric screw driver can not carry out speed governing.In patent 200720080072.7, a kind of Manual speed varying screwdriver is disclosed, by handle and change-speed gearing, by screw rod, connected to form, rotary speed that can set screw jet blade during work, this screwdriver has two grades of adjustable-speeds, a kind of is normal speed, a kind of is to accelerate to rotate, although this speed change screwdriver can be realized speed governing, but when shift speed change, a pair of gear will exit or enter engagement, more difficult and the easy generation of this transmission gear shift gearshift is impacted, in addition, what this speed change screwdriver was realized is normal rotation and the switching of accelerating rotation, do not meet the requirement that electric screw driver slows down.
Summary of the invention
The weak point existing for fear of prior art, the present invention proposes a kind of compact conformation, transmission gearshift without impulsive force, electric screw driver that rotating speed is adjustable.
The technical solution adopted for the present invention to solve the technical problems is: comprise motor, combination train decelerator, knife bar driving shaft, combination train decelerator is fixed on electric screw driver middle part, motor is positioned at combination train decelerator side, and knife bar driving shaft is fixed on combination train another side of decelerator and knife bar is connected; Described combination train decelerator comprises the first driving gear, the first sun gear, the first row star-wheel, the second driving gear, the second sun gear, the first planet pin, the second planetary gear, and described the first sun gear and described the second sun gear are ring gear gear; The first driving gear and motor output shaft are connected, and the first row star-wheel identical with three engagement respectively, and the first driving gear and three the first row star-wheels are positioned at the first sun gear gear ring, and three the first row star-wheels mesh with the first sun gear internal tooth respectively; The second driving gear is positioned at the first driving gear front portion and is connected with motor output shaft, and the second planetary gear engagement identical with three respectively, the second driving gear and three the second planetary gears are positioned at the second sun gear gear ring, and three the second planetary gears mesh with the second sun gear internal tooth respectively; Second the first uniform planet pin of sun gear outboard end You Sangerao center, three the first row star-wheels are connected with the first planet pin respectively, and three the second planetary gears are connected with the second planet pin of knife bar driveshaft end respectively;
Described knife bar driving shaft link has center positioning hole, and around uniform three the second planet pins of center positioning hole, the knife bar driving shaft other end is for revolving tool hole fixed screw jet blade.
Outside described the first sun gear and described the second sun gear, anchor ring has rubber layer.
Beneficial effect
The adjustable electric screw driver of a kind of rotating speed that the present invention proposes, by motor, combination train decelerator, knife bar driving shaft, formed, combination train decelerator is positioned at electric screw driver middle part, motor is positioned at combination train decelerator side end, knife bar driving shaft is fixed on combination train decelerator end side and knife bar is connected, and knife bar is replaceable.When output power of motor is constant, utilize combination train that the rotating speed power high, that moment of torsion is little of motor output is converted to the power that rotating speed is low, moment of torsion is large and offer knife bar, and, can in electric machine rotation process, change gearratio, shift speed change at any time, during gearshift between gear without rigid shock.The drive mechanism outward appearance of electric screw driver is cylindrical, and compact conformation is small and exquisite, is convenient for carrying; Rotational speed regulation, moment of torsion are changed effective.
The electric screw driver that rotating speed of the present invention is adjustable, according to the actual requirements, the planetary reducer of other fixed drive ratio that can also be installed in series between motor and combination train decelerator, in order to expand slewing range.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, the adjustable electric screw driver of a kind of rotating speed of the present invention is described in further detail.
Fig. 1 is the adjustable electric screw driver schematic diagram of rotating speed of the present invention.
Fig. 2 is the adjustable electric screwdriver structure explosive view of rotating speed of the present invention.
Fig. 3 is knife bar driving shaft cutaway view.
In figure:
1. motor 2. motor output shaft 3. first sun gear 4. the first row star-wheel 5. second sun gear 51. first planet pin 6. second planetary gear 7. knife bar driving shaft 71. second planet pin 8. second driving gear 9. first driving gears
The specific embodiment
The present embodiment is the adjustable electric screw driver of a kind of rotating speed.
Consult Fig. 1, Fig. 2, Fig. 3, the electric screw driver that rotating speed of the present invention is adjustable, by motor, combination train decelerator, knife bar driving shaft, formed, combination train decelerator is fixed on electric screw driver middle part, motor is positioned at combination train decelerator side, and knife bar driving shaft is fixed on combination train another side of decelerator and knife bar is connected.Combination train decelerator is comprised of one-level planet circular system and secondary planet train, comprises the first driving gear 9, the first sun gear 3, the first row star-wheel 4, the second driving gear 8, the second sun gear 5, the first planet pin 51, the second planetary gear 6; The first sun gear 3 and the second sun gear 5 are ring gear gear; The first driving gear 9 is fixedly connected with motor output shaft 2, and the first row star-wheel identical with three 4 engagements respectively, the first driving gear 9 and three the first row star-wheels 4 are positioned at the first sun gear 3 gear rings, and three the first row star-wheels 4 mesh with the first sun gear 3 internal tooths respectively; The second driving gear 8 is positioned at the first driving gear 9 front portions and is fixedly connected with motor output shaft 2 ends, and second planetary gear 6 engagements identical with three respectively, the second driving gear 8 and three the second planetary gears 6 are positioned at the second sun gear 5 gear rings, and three the second planetary gears 6 mesh with the second sun gear 5 internal tooths respectively; Second the first uniform planet pin 51 of sun gear 5 outboard end You Sangerao centers, three the first row star-wheels 4 are fixedly connected with the first planet pin 51 respectively, and three the second planetary gears 6 are fixedly connected with the second planet pin 71 of knife bar driving shaft 7 ends respectively.
As shown in Figure 3, knife bar driving shaft 7 links have center positioning hole, and motor output shaft 2 is connected by bearing with knife bar driving shaft 7 center positioning holes, with this, knife bar driving shaft 7 is carried out to center axial location; Around uniform three the second planet pins 71 of center positioning hole, knife bar driving shaft 7 other ends are for revolving tool hole fixed installation driver bit.
The first sun gear 3 and the second sun gear 5 outside anchor rings have rubber layer, during work for increasing and user's palm between frictional force.
In use, with hand, fix the first sun gear 3 respectively or the second sun gear 5 can obtain two kinds of gearratios.The number of teeth of setting the second driving gear 8, planetary gear 26, the second sun gear 5, the first driving gear 9, the first row star-wheel 4, the first sun gear 3 is respectively z
1, z
2, z
3, z
4, z
5, z
6, calculating while fixing the first sun gear 3, the gearratio of combination train is
while fixing the second sun gear 5, the gearratio of combination train is
get z
1=10, z
4=30, z
3=z
6=60, while fixing the second sun gear 5, gearratio is 7, and while fixing the first sun gear 3, gearratio is that between 2.33, two gearratios, multiple is 3 times.According to the actual requirements, the planetary reducer of other fixed drive ratio that can also be installed in series between motor 1 and combination train decelerator, in order to expand slewing range.
Claims (2)
1. the electric screw driver that rotating speed is adjustable, it is characterized in that: comprise motor, combination train decelerator, knife bar driving shaft, combination train decelerator is fixed on electric screw driver middle part, motor is positioned at combination train decelerator side, and knife bar driving shaft is fixed on combination train another side of decelerator and knife bar is connected; Described combination train decelerator comprises the first driving gear, the first sun gear, the first row star-wheel, the second driving gear, the second sun gear, the first planet pin, the second planetary gear, and described the first sun gear and described the second sun gear are ring gear gear; The first driving gear and motor output shaft are connected, and the first row star-wheel identical with three engagement respectively, and the first driving gear and three the first row star-wheels are positioned at the first sun gear gear ring, and three the first row star-wheels mesh with the first sun gear internal tooth respectively; The second driving gear is positioned at the first driving gear front portion and is connected with motor output shaft, and the second planetary gear engagement identical with three respectively, the second driving gear and three the second planetary gears are positioned at the second sun gear gear ring, and three the second planetary gears mesh with the second sun gear internal tooth respectively; Second the first uniform planet pin of sun gear outboard end You Sangerao center, three the first row star-wheels are connected with the first planet pin respectively, and three the second planetary gears are connected with the second planet pin of knife bar driveshaft end respectively;
Described knife bar driving shaft link has center positioning hole, and around uniform three the second planet pins of center positioning hole, the knife bar driving shaft other end is for revolving tool hole fixed screw jet blade.
2. the adjustable electric screw driver of rotating speed according to claim 1, is characterized in that: outside described the first sun gear and described the second sun gear, anchor ring has rubber layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310431986.3A CN103600327A (en) | 2013-09-18 | 2013-09-18 | Electric screw driver with adjustable rotating speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310431986.3A CN103600327A (en) | 2013-09-18 | 2013-09-18 | Electric screw driver with adjustable rotating speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103600327A true CN103600327A (en) | 2014-02-26 |
Family
ID=50118623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310431986.3A Pending CN103600327A (en) | 2013-09-18 | 2013-09-18 | Electric screw driver with adjustable rotating speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103600327A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105437137A (en) * | 2014-07-23 | 2016-03-30 | 国际商业机器公司 | Screw screw-in method and device |
| WO2016127472A1 (en) * | 2015-02-11 | 2016-08-18 | 徐新生 | Speed change gear box applicable to battery-type electric tool |
| GB2597032A (en) * | 2019-10-28 | 2022-01-12 | Snap On Tools Corp | Double reduction gear train |
| CN117158759A (en) * | 2023-10-10 | 2023-12-05 | 广东常明机电有限公司 | Curtain retraction device of electric curtain and electric curtain |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1059450A (en) * | 1909-08-28 | 1913-04-22 | Foote Bros Gear & Machine Co | Speed-reducing mechanism. |
| US4825727A (en) * | 1985-05-29 | 1989-05-02 | Canon Kabushiki Kaisha | Speed reducer |
| CN2207479Y (en) * | 1994-10-19 | 1995-09-13 | 华北石油管理局水电厂 | 3-speed planetary speed reducer |
| CN2244116Y (en) * | 1995-09-05 | 1997-01-01 | 杨文明 | Planet gear series high transmission ratio speed reducer |
| US6758783B1 (en) * | 2003-03-22 | 2004-07-06 | Power Network Industry Co., Ltd. | Automatic speed shifting device |
| CN101743375A (en) * | 2007-05-15 | 2010-06-16 | 实耐宝公司 | Planetary gear set centering ring |
| CN201744959U (en) * | 2010-06-22 | 2011-02-16 | 深圳市协合欣电子有限公司 | Electric screw driver with planetary gear set speed reduction drive device |
-
2013
- 2013-09-18 CN CN201310431986.3A patent/CN103600327A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1059450A (en) * | 1909-08-28 | 1913-04-22 | Foote Bros Gear & Machine Co | Speed-reducing mechanism. |
| US4825727A (en) * | 1985-05-29 | 1989-05-02 | Canon Kabushiki Kaisha | Speed reducer |
| CN2207479Y (en) * | 1994-10-19 | 1995-09-13 | 华北石油管理局水电厂 | 3-speed planetary speed reducer |
| CN2244116Y (en) * | 1995-09-05 | 1997-01-01 | 杨文明 | Planet gear series high transmission ratio speed reducer |
| US6758783B1 (en) * | 2003-03-22 | 2004-07-06 | Power Network Industry Co., Ltd. | Automatic speed shifting device |
| CN101743375A (en) * | 2007-05-15 | 2010-06-16 | 实耐宝公司 | Planetary gear set centering ring |
| CN201744959U (en) * | 2010-06-22 | 2011-02-16 | 深圳市协合欣电子有限公司 | Electric screw driver with planetary gear set speed reduction drive device |
Non-Patent Citations (1)
| Title |
|---|
| 王玉，高桂仙: "《机械设计基础》", 31 July 2011, 北京理工大学出版社 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105437137A (en) * | 2014-07-23 | 2016-03-30 | 国际商业机器公司 | Screw screw-in method and device |
| WO2016127472A1 (en) * | 2015-02-11 | 2016-08-18 | 徐新生 | Speed change gear box applicable to battery-type electric tool |
| GB2597032A (en) * | 2019-10-28 | 2022-01-12 | Snap On Tools Corp | Double reduction gear train |
| AU2020260376B2 (en) * | 2019-10-28 | 2022-06-30 | Snap-On Incorporated | Double reduction gear train |
| GB2590778B (en) * | 2019-10-28 | 2022-09-07 | Snap On Tools Corp | Double reduction gear train |
| GB2597032B (en) * | 2019-10-28 | 2022-09-28 | Snap On Incorporated | Double reduction gear train |
| US11565394B2 (en) | 2019-10-28 | 2023-01-31 | Snap-On Incorporated | Double reduction gear train |
| CN117158759A (en) * | 2023-10-10 | 2023-12-05 | 广东常明机电有限公司 | Curtain retraction device of electric curtain and electric curtain |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140226 |