CN103753465A - Variable-speed ratchet device for screwdriver and screwdriver - Google Patents
Variable-speed ratchet device for screwdriver and screwdriver Download PDFInfo
- Publication number
- CN103753465A CN103753465A CN201410035431.1A CN201410035431A CN103753465A CN 103753465 A CN103753465 A CN 103753465A CN 201410035431 A CN201410035431 A CN 201410035431A CN 103753465 A CN103753465 A CN 103753465A
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- CN
- China
- Prior art keywords
- ratchet
- screwdriver
- pawl seat
- transmission shaft
- gear
- 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.)
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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
- B25B15/00—Screwdrivers
- B25B15/02—Screwdrivers operated by rotating the handle
- B25B15/04—Screwdrivers operated by rotating the handle with ratchet action
Abstract
The invention discloses a variable-speed ratchet device for a screwdriver and the screwdriver. The problem that an existing screwdriver is inconvenient to operate and low in work efficiency is solved. The variable-speed ratchet device for the screwdriver comprises a ratchet seat, a rotary sleeve and a transmission shaft, wherein the transmission shaft is sleeved with the ratchet seat, and a ratchet transmission component is arranged in the ratchet seat. The transmission shaft is provided with a first mesh portion. The rotary sleeve is installed on the ratchet seat and controls separation and reunion of the ratchet transmission component and the first mesh portion. The variable-speed ratchet device further comprises a gear variable-speed mechanism. The gear variable-speed mechanism comprises an outer shell, a transmission gear sleeve and a variable gear set, wherein the variable gear set and the transmission gear sleeve are mutually meshed. The transmission shaft is provided with a second mesh portion meshed with the variable gear set. The transmission gear sleeve is connected to the ratchet seat and is driven by the ratchet seat to rotate. The variable-speed ratchet device can be applied to various regular screwdrivers and various electric screwdrivers.
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 conventionally, user in use, owing to gripping the hand of handle of a knife, be merely able to rotate a less angle, therefore when needs are during to a part continuous several times turn, needing is therebetween deadlocked allows hand turn round an angle in the other direction, sometimes be screwdriver temporarily to be withdrawn from part realize revolution in the other direction, this mode need to be again by screwdriver alignment element, sometimes be to unclamp handle of a knife realization revolution in the other direction with the auxiliary hand that grips handle of a knife that allows of another hand, obviously, adopt above-mentioned these two kinds of modes of operation to need constantly pine of user, tight palm is realized knife bar and is rotated, inconvenient operation, affect operating efficiency, also easily screw terminal is twisted bad.
For this reason, screwdriver with ratchet device is disclosed in prior art, this screwdriver is by ratchet, ratchet driving torque, during use, to a direction rotation handle of a knife handle of a knife in season, rotates to apply moment of torsion to part together with knife bar, and counter-rotate seasonal handle of a knife, relative to knife bar, rotate, so that knife bar is positioned on part, so user is when practical operation, only need to grip continuous the rotating back and forth of handle of a knife, do not need therebetween to pause, can reach the object that screws fast or unscrew part.
Realizing and using 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 to say, handle of a knife rotates how many angles, and knife bar is the same angle of rotating photo also.In some specific workplaces, for example need in the situation of fast assembling-disassembling screw, this screwdriver obviously can not meet the requirement of fast assembling-disassembling, generally can only accelerate hand spinning movement by operator and realize.
[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, can realize the speed output of driver bit, 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, in described pawl seat, be provided with ratchet driving assembly, described power transmission shaft is provided with the first engaging piece, described rotary sleeve is arranged on the clutch of controlling ratchet driving assembly and the first engaging piece on pawl seat, 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 being meshed with gear teeth wheels, described driving cog wheel case is connected to pawl seat and drives rotation by pawl seat.
Further, described gear teeth wheels comprise and are distributed in described driving cog wheel case some change-speed gearings around, 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, in described shell body, be provided with accommodating cavity, in described accommodating cavity, be provided with location-plate, 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 that holds 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 brake(-holder) blocks and is connected to the flexible member between described two ratchet brake(-holder) blocks, described base is provided with ratchet stopper slot, described ratchet brake(-holder) block is positioned at ratchet stopper slot, described rotary sleeve is provided with shifting block, and described shifting block can be stirred ratchet brake(-holder) block and move in ratchet stopper slot.
For solving the problems of the technologies described above, the invention allows for a kind of screwdriver, comprise 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, the rotating speed that makes knife bar can be the several times of handle of a knife rotating speed, thereby realized the speed output of driver bit, in some specific workplaces, for example need in the situation of 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 be below the specific embodiment, accompanying drawing in detailed exposure.
[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 blast structural representation of screwdriver in the preferred embodiment of the present invention;
Fig. 3 is the cooperation schematic diagram of pawl seat, rotary sleeve and the ratchet driving assembly of screwdriver in the preferred embodiment of the present invention;
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.
[specific embodiment]
Accompanying drawing below in conjunction with the embodiment of the present invention is explained and illustrated the technical scheme of the embodiment of the present invention, but following embodiment is only the preferred embodiments of the present invention, not all.Embodiment based in embodiment, those skilled in the art are other embodiment that obtains under the prerequisite of not making creative work, 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 that holds ratchet driving assembly 3 between base 11 and cover plate 12.With reference to Fig. 4, ratchet driving assembly 3 comprises two ratchet brake(-holder) blocks 31 and is connected to two flexible members 30 between ratchet brake(-holder) block 31, flexible member is spring normally, in cavity, form the ratchet stopper slot of two installation ratchet brake(-holder) blocks, and the sidewall of ratchet stopper slot is provided with inclined-plane 112, ratchet brake(-holder) block 31 can move along the inclined-plane 112 of ratchet stopper slot.On power transmission shaft 4, be provided with the normally axial bar shaped tooth of the first engaging piece 41, the first engaging pieces 41 that can be meshed with ratchet brake(-holder) block 31.
In conjunction with Fig. 5, rotary sleeve 2 is rotating to be enclosed within on pawl seat 1, is provided with two shifting blocks 21 in rotary sleeve 2, respectively corresponding two ratchet brake(-holder) blocks 31, and after having assembled, shifting block 21 extend in the cavity of base 11 through cover plate 12.
With reference to Fig. 3, under this state, if clockwise turn rotary sleeve 2, the shifting block 21b on right side promotes the ratchet brake(-holder) block 31b down sliding on right side, make the ratchet brake(-holder) block 31b on right side and the first engaging piece 41 of power transmission shaft separated, and the ratchet brake(-holder) block 31a in left side under the effect of flexible member 30 upward sliding and with the first engaging piece 41 engagement of power transmission shaft 4, thus, when pawl seat 1 rotates counterclockwise, ratchet brake(-holder) block 31a by left side drives power transmission shaft to rotate counterclockwise, stopping due to the ratchet stopper slot 111a in left side simultaneously, power transmission shaft cannot clockwise rotate.
If counterclockwise turn rotary sleeve 2, the shifting block 21a in left side promotes the ratchet brake(-holder) block 31a down sliding in left side, make the ratchet brake(-holder) block 31a in left side separated with the first engaging piece 41 of power transmission shaft, and the ratchet brake(-holder) block 31b on right side under the effect of flexible member 30 upward sliding and with the first engaging piece 41 engagement of power transmission shaft, thus, when pawl seat 1 clockwise rotates, ratchet brake(-holder) block 31b by right side drives power transmission shaft to clockwise rotate, simultaneously, due to the stopping of the ratchet stopper slot 111b on right side, power transmission shaft cannot clockwise rotate.
Known by above-mentioned principles illustrated, user, when practical operation, does not need screwdriver to remove part, can be constantly turn handle of a knife back and forth, and knife bar only can rotate toward the direction, thereby 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, by gear shift, can realize knife bar and rotate relative to handle of a knife rotating speed several times, thereby reach the object that screws fast or unscrew part.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 comprised 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, at the inner accommodating cavity that forms of main casing 511.
For convenience of assembling, above-mentioned several change-speed gearings 522 can first be assembled as a whole, concrete: two relative location-plates 521 are set, and change-speed gearing 522 is arranged between two 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 afterbodys, one flat axis body 501 is set, such as D oblique crank Z, flat axis body 501 is inserted to the cover plate 12 of aforementioned pawl seat 1, the connecting hole 121 coordinating with flat axis body 501 is set on cover plate 12, like this, when pawl seat 1 rotation, can be with nutating gear 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, the second engaging piece 42, can realize speed output, 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, when pawl seat 1 band nutating gear cover 50 rotates a circle, change-speed gearing 522 rotates two circles, power transmission shaft 4 rotates four circles, and has reached thus the object of four times of speed changes.Adjust gear ratio and can realize corresponding speed output, 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 ends are used for installing various driver bits, 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, can arrive the speed output of driver bit during use.If unclamp the shell body 51 of gear shift during operation,, for being switched to rated speed, handle of a knife rotates a circle, and knife bar 6 also rotates a circle, and user selects according to actual working condition.
The embodiment of the present invention can be applicable to various conventional screwdrivers, electric screw driver.
By above-described embodiment, object of the present invention is by fully effective having reached.The personage who is familiar with this skill should be understood that the content that the present invention includes but be not limited to accompanying drawing and describe in the specific embodiment above.Any modification that does not depart from function and structure principle of the present invention all will be included in the scope of claims.
Claims (8)
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, in described pawl seat, be provided with ratchet driving assembly, described power transmission shaft is provided with the first engaging piece, described rotary sleeve is arranged on the clutch of controlling ratchet driving assembly and the first engaging piece on pawl seat, 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 being meshed with gear teeth wheels, described driving cog wheel case is connected to pawl seat and drives rotation by pawl seat.
2. a kind of screwdriver speed change ratchet device as claimed in claim 1, it is characterized in that: described gear teeth wheels comprise and are distributed in described driving cog wheel case some change-speed gearings around, 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, is characterized in that: in described shell body, be provided with accommodating cavity, in described accommodating cavity, be provided with location-plate, described change-speed gearing is arranged on described location-plate by rotating shaft.
4. a kind of screwdriver speed change ratchet device as described in claim 1 or 2 or 3, is characterized in that: 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.
5. a kind of screwdriver speed change ratchet device as claimed in claim 4, is characterized in that: described pawl seat comprises base and cover plate, forms the cavity that holds described ratchet driving assembly between described base and cover plate, and described connecting hole is located on described cover plate.
6. a kind of screwdriver speed change ratchet device as claimed in claim 5, it is characterized in that: described ratchet driving assembly comprises two ratchet brake(-holder) blocks and is connected to the flexible member between described two ratchet brake(-holder) blocks, described base is provided with ratchet stopper slot, described ratchet brake(-holder) block is positioned at ratchet stopper slot, described rotary sleeve is provided with shifting block, and described shifting block can be stirred ratchet brake(-holder) block and move in ratchet stopper slot.
7. 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 claim 1 to 6 any one.
8. a kind of screwdriver as claimed in claim 7, 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 true CN103753465A (en) | 2014-04-30 |
| CN103753465B 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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| Country | Link |
|---|---|
| CN (1) | CN103753465B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493772A (en) * | 2014-12-29 | 2015-04-08 | 绍兴环洲工具制造有限公司 | Speed change head and screwdriver |
| CN105459002A (en) * | 2014-07-11 | 2016-04-06 | 杭州巨星工具有限公司 | Speed-increase bidirectional mechanical converter |
| CN109834634A (en) * | 2017-11-26 | 2019-06-04 | 乐山通目科技有限公司 | Mechanical bottle opener |
| US10589405B2 (en) | 2014-07-11 | 2020-03-17 | Hangzhou Great Star Tools Co., Ltd. | Speed increasing bidirectional mechanical converter |
| CN113770964A (en) * | 2021-09-24 | 2021-12-10 | 王富强 | Adjustable labor-saving screwdriver |
Citations (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 |
| CN102785206A (en) * | 2012-08-21 | 2012-11-21 | 浙江三鼎工具有限公司 | Ratchet gear of screw driver and screw driver using ratchet gear |
| CN202742290U (en) * | 2012-04-07 | 2013-02-20 | 刘鹤朋 | Fast rotating screwdriver |
| CN203390828U (en) * | 2013-05-27 | 2014-01-15 | 杭州巨星工具有限公司 | Screw driver |
| CN103522247A (en) * | 2013-10-23 | 2014-01-22 | 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 |
-
2014
- 2014-01-24 CN CN201410035431.1A patent/CN103753465B/en active Active
Patent Citations (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 |
| CN102785206A (en) * | 2012-08-21 | 2012-11-21 | 浙江三鼎工具有限公司 | Ratchet gear of screw driver and screw driver using ratchet gear |
| CN203390828U (en) * | 2013-05-27 | 2014-01-15 | 杭州巨星工具有限公司 | Screw driver |
| CN103522247A (en) * | 2013-10-23 | 2014-01-22 | 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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105459002A (en) * | 2014-07-11 | 2016-04-06 | 杭州巨星工具有限公司 | Speed-increase bidirectional mechanical converter |
| CN105459002B (en) * | 2014-07-11 | 2019-12-24 | 杭州巨星工具有限公司 | Screw driver |
| US10589405B2 (en) | 2014-07-11 | 2020-03-17 | Hangzhou Great Star Tools Co., Ltd. | Speed increasing bidirectional mechanical converter |
| CN104493772A (en) * | 2014-12-29 | 2015-04-08 | 绍兴环洲工具制造有限公司 | Speed change head and screwdriver |
| WO2016106796A1 (en) * | 2014-12-29 | 2016-07-07 | 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 |
| CN113770964A (en) * | 2021-09-24 | 2021-12-10 | 王富强 | Adjustable labor-saving screwdriver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103753465B (en) | 2016-02-10 |
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