CN103753465B - A kind of screwdriver speed change ratchet device and screwdriver thereof - Google Patents
A kind of screwdriver speed change ratchet device and screwdriver thereof Download PDFInfo
- Publication number
- CN103753465B CN103753465B CN201410035431.1A CN201410035431A CN103753465B CN 103753465 B CN103753465 B CN 103753465B CN 201410035431 A CN201410035431 A CN 201410035431A CN 103753465 B CN103753465 B CN 103753465B
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- ratchet
- screwdriver
- pawl seat
- gear
- power transmission
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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
- B25B15/00—Screwdrivers
- B25B15/02—Screwdrivers operated by rotating the handle
- B25B15/04—Screwdrivers operated by rotating the handle with ratchet action
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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 kind of screwdriver speed change ratchet device and screwdriver thereof, solve current screwdriver inconvenient operation, ineffective problem, screwdriver speed change ratchet device of the present invention comprises pawl seat, rotary sleeve and power transmission shaft, described pawl seat is sleeved on described power transmission shaft, ratchet driving assembly is provided with in described pawl seat, described power transmission shaft is provided with the first engaging piece, described rotary sleeve is arranged on clutch pawl seat controlling ratchet driving assembly and the first engaging piece, described speed change ratchet device also comprises gear shift, described gear shift comprises shell body, driving cog wheel case and gear teeth wheels, described gear teeth wheels are meshed with driving cog wheel case, described power transmission shaft is provided with the second engaging piece be meshed with gear teeth wheels, described driving cog wheel case is connected to pawl seat and is driven by pawl seat and rotates.The embodiment of the present invention can be applicable to various conventional screwdriver, electric screw driver.
Description
[technical field]
The present invention relates to a kind of screwdriver, especially the ratchet device of screwdriver.
[background technology]
Existing screwdriver mainly comprises handle of a knife, knife bar and cutter head, handle of a knife and knife bar are fixed together usually, user in use, because the hand gripping handle of a knife is merely able to the less angle of rotation one, therefore when needs are to a part continuous several times turn, needing therebetween is deadlocked allows hand turn round an angle in the other direction, sometimes be screwdriver is temporarily withdrawn from part realize revolution in the other direction, this mode needs again by screwdriver alignment element, sometimes be allow the hand gripping handle of a knife unclamp handle of a knife with another Hand supplementary realize revolution in the other direction, obviously, these two kinds of modes of operation above-mentioned are adopted to need user constantly loose, tight palm realizes knife bar and rotates, inconvenient operation, affect operating efficiency, also easy screw terminal is twisted bad.
For this reason, the screwdriver with ratchet device is disclosed in prior art, this screwdriver is by ratchet, ratchet driving torque, during use, rotates handle of a knife handle of a knife in season rotate to apply moment of torsion to part together with knife bar to a direction, and reversely rotate seasonal handle of a knife relative to knife bar and rotate, to be positioned on part by knife bar, therefore user is when practical operation, only needs to grip handle of a knife continuous print and rotates back and forth, do not need therebetween to pause, the object screwing or unscrew part fast can be reached.
In realization with use in the process of above-mentioned screwdriver, at least also there are the following problems: no matter be traditional screwdriver, or with the screwdriver of ratchet device, handle of a knife and knife bar are all that synchronous same-speed rotates, that is, handle of a knife rotates how many angles, and knife bar also rotates identical angle.In some specific workplaces, such as, when needing fast assembling-disassembling screw, this screwdriver obviously can not meet the requirement of fast assembling-disassembling, generally can only accelerate hand spinning movement to realize by operator.
[summary of the invention]
Problem to be solved by this invention is just to provide a kind of screwdriver speed change ratchet device and screwdriver thereof, and the speed that can realize driver bit exports, and increases work efficiency.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of screwdriver speed change ratchet device, comprise pawl seat, rotary sleeve and power transmission shaft, described pawl seat is sleeved on described power transmission shaft, ratchet driving assembly is provided with in described pawl seat, described power transmission shaft is provided with the first engaging piece, described rotary sleeve is arranged on clutch pawl seat controlling ratchet driving assembly and the first engaging piece, described speed change ratchet device also comprises gear shift, described gear shift comprises shell body, driving cog wheel case and gear teeth wheels, described gear teeth wheels are meshed with driving cog wheel case, described power transmission shaft is provided with the second engaging piece be meshed with gear teeth wheels, described driving cog wheel case is connected to pawl seat and is driven by pawl seat and rotates.
Further, described gear teeth wheels comprise the some change-speed gearings be distributed in around described driving cog wheel case, described change-speed gearing comprises small-diameter gear and large diameter gear, and described small-diameter gear is meshed with driving cog wheel case, and described large diameter gear is meshed with the second engaging piece.
Further, be provided with accommodating cavity in described shell body, be provided with location-plate in described accommodating cavity, described change-speed gearing is arranged on described location-plate by rotating shaft.
Further, described driving cog wheel case afterbody is provided with flat axis body, and described pawl seat is provided with connecting hole, and described flat axis body inserts in described connecting hole.
Further, described pawl seat comprises base and cover plate, forms the cavity holding described ratchet driving assembly between described base and cover plate, and described connecting hole is located on described cover plate.
Further, described ratchet driving assembly comprises two ratchet gear brake sheets and is connected to the flexible member between described two ratchet gear brake sheets, described base is provided with ratchet stopper slot, described ratchet gear brake sheet is positioned at ratchet stopper slot, described rotary sleeve is provided with shifting block, and described shifting block can be stirred ratchet gear brake sheet and move in ratchet stopper slot.
For solving the problems of the technologies described above, the invention allows for a kind of screwdriver, comprising knife bar and handle of a knife, described handle of a knife is provided with the screwdriver speed change ratchet device described in above-mentioned arbitrary technical scheme.
Further, described knife bar is connected on described power transmission shaft, and described handle of a knife is connected on described pawl seat.
Beneficial effect of the present invention:
The present invention increases gear shift on the basis of existing screw driver ratchet device, by the effect of gear shift, make the rotating speed of knife bar can be the several times of handle of a knife rotating speed, thus the speed achieving driver bit exports, in some specific workplaces, such as, when needing fast assembling-disassembling screw, screwdriver of the present invention can well meet the requirement of fast assembling-disassembling.
These features of the present invention and advantage will detailed description of the invention below, exposure detailed in accompanying drawing.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing, the present invention is described further:
Fig. 1 is the package assembly schematic diagram of screwdriver in the preferred embodiment of the present invention;
Fig. 2 is the detonation configuration schematic diagram of screwdriver in the preferred embodiment of the present invention;
Fig. 3 is the cooperation schematic diagram of the pawl seat of screwdriver in the preferred embodiment of the present invention, rotary sleeve and ratchet driving assembly;
Fig. 4 is the structural representation of ratchet driving assembly in the preferred embodiment of the present invention;
Fig. 5 is the structural representation of rotary sleeve in the preferred embodiment of the present invention.
[detailed description of the invention]
The technical scheme of accompanying drawing to the embodiment of the present invention below in conjunction with the embodiment of the present invention is explained and illustrated, but following embodiment is only the preferred embodiments of the present invention, and not all.Based on the embodiment in embodiment, those skilled in the art under the prerequisite not making creative work obtain other embodiments, all belong to protection scope of the present invention.
With reference to Fig. 1,2,3, the screwdriver speed change ratchet device of the present embodiment, comprises pawl seat 1, rotary sleeve 2 and power transmission shaft 4, and pawl seat 1 is sleeved on power transmission shaft 4, pawl seat 1 comprises base 11 and cover plate 12, forms the cavity holding ratchet driving assembly 3 between base 11 and cover plate 12.With reference to Fig. 4, the flexible member 30 that ratchet driving assembly 3 comprises two ratchet gear brake sheets 31 and is connected between two ratchet gear brake sheets 31, flexible member is spring normally, the ratchet stopper slot that two are installed ratchet gear brake sheet is formed in cavity, and the sidewall of ratchet stopper slot is provided with inclined-plane 112, ratchet gear brake sheet 31 can move along the inclined-plane 112 of ratchet stopper slot.Power transmission shaft 4 is provided with the bar shaped tooth that first engaging piece 41, first engaging piece 41 that can be meshed with ratchet gear brake sheet 31 is normally axial.
Composition graphs 5, rotary sleeve 2 is rotating to be enclosed within pawl seat 1, is provided with two shifting blocks 21 in rotary sleeve 2, respectively corresponding two ratchet gear brake sheets 31, and after having assembled, shifting block 21 extend in the cavity of base 11 through cover plate 12.
With reference to Fig. 3, in this case, if turn rotary sleeve 2 clockwise, the shifting block 21b on right side promotes the ratchet gear brake sheet 31b slide downward on right side, the ratchet gear brake sheet 31b on right side is separated with the first engaging piece 41 of power transmission shaft, and the ratchet gear brake sheet 31a in left side upward sliding engaging with the first engaging piece 41 of power transmission shaft 4 under the effect of flexible member 30, thus, when pawl seat 1 rotates counterclockwise, power transmission shaft is driven to rotate counterclockwise by the ratchet gear brake sheet 31a in left side, simultaneously due to the stop of the ratchet stopper slot 111a in left side, power transmission shaft cannot rotate clockwise.
If turn rotary sleeve 2 counterclockwise, the shifting block 21a in left side promotes the ratchet gear brake sheet 31a slide downward in left side, the ratchet gear brake sheet 31a in left side is separated with the first engaging piece 41 of power transmission shaft, and the ratchet gear brake sheet 31b on right side upward sliding engaging with the first engaging piece 41 of power transmission shaft under the effect of flexible member 30, thus, when pawl seat 1 rotates clockwise, power transmission shaft is driven to rotate clockwise by the ratchet gear brake sheet 31b on right side, simultaneously due to the stop of the ratchet stopper slot 111b on right side, power transmission shaft cannot rotate clockwise.
Known by above-mentioned principles illustrated, user, when practical operation, does not need screwdriver to remove part, can continuous turn handle of a knife back and forth, and knife bar only can rotate toward the direction, thus solves the unhandy problem of conventional screw-driver in order.
For the present embodiment, on the basis of current ratchet screwdriver, be also provided with gear shift, knife bar can be realized by gear shift and rotate relative to handle of a knife rotating speed several times, thus reach the object screwing or unscrew part fast.With reference to Fig. 1,2, concrete: gear shift comprises shell body 51, driving cog wheel case 50 and gear teeth wheels 52, gear teeth wheels 52 are made up of several change-speed gearings 522, the number of change-speed gearing 522 can be determined according to the design of instrument, and change-speed gearing 522 has small-diameter gear 5221 and large diameter gear 5222.Shell body 51 comprises main casing 511 and bonnet 510, forms accommodating cavity in main casing 511 inside.
For convenience of assembling, several change-speed gearings 522 above-mentioned can first be assembled as a whole, concrete: arrange two pieces of relative location-plates 521, change-speed gearing 522 is arranged between two pieces of location-plates 521 by rotating shaft 5220, and according to the formal distribution of circumference array, form gear teeth wheels.With reference to Fig. 2, driving cog wheel case 50 is installed on power transmission shaft 4, at driving cog wheel case 50 afterbody, one flat axis body 501 is set, such as D oblique crank Z, flat axis body 501 is inserted the cover plate 12 of aforementioned pawl seat 1, cover plate 12 is arranged the connecting hole 121 coordinated with flat axis body 501, like this, nutating gear can be with when pawl seat 1 rotates to overlap 50 synchronous rotaries; Fit on bonnet 510, gear teeth wheels 52, shell body 51 successively, gear teeth wheels 52 are contained in the accommodating cavity of shell body 51, the small-diameter gear 5221 of change-speed gearing 522 is meshed with driving cog wheel case 50, and the large diameter gear 5222 of change-speed gearing 522 is meshed with the second engaging piece 42 of power transmission shaft 4.
By the adjustment of gear ratio between gear teeth wheels 52, driving cog wheel case 50, second engaging piece 42, speed can be realized export, such as in the present embodiment, driving cog wheel case 50 is 2:1 with the gear ratio of the small-diameter gear 5221 of change-speed gearing 522, the large diameter gear 5222 of change-speed gearing 522 and the gear ratio of the second engaging piece are 2:1, so in actual mechanical process, be with nutating gear to overlap 50 when pawl seat 1 to rotate a circle, change-speed gearing 522 rotates two circles, power transmission shaft 4 then rotates four circles, and reaches the object of four times of speed changes thus.Adjustment gear ratio can realize corresponding speed and export, and other embodiment no longer describes in detail.
With reference to Fig. 1, the screwdriver that the present embodiment provides has knife bar 6 and handle of a knife, wherein knife bar 6 is connected on above-mentioned power transmission shaft 4, handle of a knife (not shown) is connected on pawl seat 1, knife bar 6 end for installing various driver bit, such as a word bolt cutter head, cross screw bolt cutter head, die nut etc.User, when practical operation, grips handle of a knife on the other hand, and another hand grips the shell body 51 of gear shift, and the speed that can arrive driver bit during use exports.If unclamp the shell body 51 of gear shift during operation, then for being switched to rated speed, namely handle of a knife rotates a circle, and knife bar 6 also rotates a circle, and user selects according to the working condition of reality.
The embodiment of the present invention can be applicable to various conventional screwdriver, electric screw driver.
By above-described embodiment, object of the present invention is reached by fully effective.The personage being familiar with this skill should be understood that and the present invention includes but the content being not limited to accompanying drawing and describing in detailed description of the invention above.Any amendment not departing from function and structure principle of the present invention all will comprise within the scope of the appended claims.
Claims (7)
1. a screwdriver speed change ratchet device, comprise pawl seat, rotary sleeve and power transmission shaft, described pawl seat is sleeved on described power transmission shaft, ratchet driving assembly is provided with in described pawl seat, described power transmission shaft is provided with the first engaging piece, described rotary sleeve is arranged on clutch pawl seat controlling ratchet driving assembly and the first engaging piece, it is characterized in that: described speed change ratchet device also comprises gear shift, described gear shift comprises shell body, driving cog wheel case and gear teeth wheels, described gear teeth wheels are meshed with driving cog wheel case, described power transmission shaft is provided with the second engaging piece be meshed with gear teeth wheels, described driving cog wheel case is connected to pawl seat and is driven by pawl seat and rotates, described driving cog wheel case afterbody is provided with flat axis body, described pawl seat is provided with connecting hole, described flat axis body inserts in described connecting hole.
2. a kind of screwdriver speed change ratchet device as claimed in claim 1, it is characterized in that: described gear teeth wheels comprise the some change-speed gearings be distributed in around described driving cog wheel case, described change-speed gearing comprises small-diameter gear and large diameter gear, described small-diameter gear is meshed with driving cog wheel case, and described large diameter gear is meshed with the second engaging piece.
3. a kind of screwdriver speed change ratchet device as claimed in claim 2, it is characterized in that: be provided with accommodating cavity in described shell body, be provided with location-plate in described accommodating cavity, described change-speed gearing is arranged on described location-plate by rotating shaft.
4. a kind of screwdriver speed change ratchet device as claimed in claim 1, it is characterized in that: described pawl seat comprises base and cover plate, form the cavity holding described ratchet driving assembly between described base and cover plate, described connecting hole is located on described cover plate.
5. a kind of screwdriver speed change ratchet device as claimed in claim 4, it is characterized in that: described ratchet driving assembly comprises two ratchet gear brake sheets and is connected to the flexible member between described two ratchet gear brake sheets, described base is provided with ratchet stopper slot, described ratchet gear brake sheet is positioned at ratchet stopper slot, described rotary sleeve is provided with shifting block, and described shifting block can be stirred ratchet gear brake sheet and move in ratchet stopper slot.
6. a screwdriver, comprises knife bar and handle of a knife, it is characterized in that: described handle of a knife is provided with the screwdriver speed change ratchet device as described in any one of claim 1 to 5.
7. a kind of screwdriver as claimed in claim 6, is characterized in that: described knife bar is connected on described power transmission shaft, and described handle of a knife is connected on described pawl seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410035431.1A CN103753465B (en) | 2014-01-24 | 2014-01-24 | A kind of screwdriver speed change ratchet device and screwdriver thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410035431.1A CN103753465B (en) | 2014-01-24 | 2014-01-24 | A kind of screwdriver speed change ratchet device and screwdriver thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103753465A CN103753465A (en) | 2014-04-30 |
| CN103753465B true CN103753465B (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410035431.1A Active CN103753465B (en) | 2014-01-24 | 2014-01-24 | A kind of screwdriver speed change ratchet device and screwdriver thereof |
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| CN (1) | CN103753465B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6410917B2 (en) | 2014-07-11 | 2018-10-24 | 杭州巨星工具有限公司 | screwdriver |
| CN105459002B (en) * | 2014-07-11 | 2019-12-24 | 杭州巨星工具有限公司 | Screw driver |
| CN104493772B (en) * | 2014-12-29 | 2017-01-18 | 绍兴环洲工具制造有限公司 | Speed change head and screwdriver |
| CN109834634A (en) * | 2017-11-26 | 2019-06-04 | 乐山通目科技有限公司 | Mechanical bottle opener |
| CN109877752A (en) * | 2019-04-15 | 2019-06-14 | 宁波泓谊塑胶科技有限公司 | A kind of internal-gear type ratchet screwdriver |
| CN113770964A (en) * | 2021-09-24 | 2021-12-10 | 王富强 | Adjustable labor-saving screwdriver |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5406866A (en) * | 1992-02-06 | 1995-04-18 | Badiali; John A. | Speed-selectable screwdriver |
| DE20213754U1 (en) * | 2002-09-05 | 2002-10-31 | Huang Chin Tan | Ratchet device for screwdrivers |
| CN202742290U (en) * | 2012-04-07 | 2013-02-20 | 刘鹤朋 | Fast rotating screwdriver |
| CN102785206B (en) * | 2012-08-21 | 2015-10-21 | 浙江三鼎工具有限公司 | A kind of screw driver ratchet device and use this ratchet device screwdriver |
| CN203390828U (en) * | 2013-05-27 | 2014-01-15 | 杭州巨星工具有限公司 | Screw driver |
| CN103522247B (en) * | 2013-10-23 | 2016-06-29 | 浙江三鼎工具有限公司 | Multiple rotation ratchet wheel screwdriver handle |
| CN203765536U (en) * | 2014-01-24 | 2014-08-13 | 浙江斐凌工具有限公司 | Screwdriver speed change ratchet device and screwdriver thereof |
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2014
- 2014-01-24 CN CN201410035431.1A patent/CN103753465B/en active Active
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| Publication number | Publication date |
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| CN103753465A (en) | 2014-04-30 |
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