CN104985572A - Self-locking device for electric tool and rotating shaft - Google Patents
Self-locking device for electric tool and rotating shaft Download PDFInfo
- Publication number
- CN104985572A CN104985572A CN201510338046.9A CN201510338046A CN104985572A CN 104985572 A CN104985572 A CN 104985572A CN 201510338046 A CN201510338046 A CN 201510338046A CN 104985572 A CN104985572 A CN 104985572A
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- CN
- China
- Prior art keywords
- self
- output
- main shaft
- locking
- gear
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
- B23D45/16—Hand-held sawing devices with circular saw blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Portable Power Tools In General (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Sawing (AREA)
Abstract
The invention discloses a self-locking device for an electric tool and a rotating shaft. The self-locking device comprises an output main shaft and an output gear arranged on the output main shaft; the output gear is arranged in a gear case, the output main shaft penetrates out from an output hole of the gear case, and a circumferential angle locking structure is arranged between the output main shaft and an inner hole of the output gear; and through the circumferential angle locking structure, the output main shaft can freely rotate within a certain angle scope relative to the output gear, and a self-locking driving structure is arranged on the outer circle of the output main shaft and drives a self-locking pin shaft to lock the output main shaft and the output gear when the output main shaft serves as a driving piece. By means of self-locking device for the electric tool and the rotating shaft, when working heads such as a saw web or a grinding wheel is replaced, operation is rapider, more convenient and more reliable, and one-hand operation can be achieved.
Description
Technical field
The present invention relates to electric tool, particularly relate to a kind of rotating shaft self-locking device being applied to AC and DC electric circular saw, angle grinding machine type electric tool product.
Background technology
Current AC and DC product, when changing saw blade or grinding wheel, all by locking by electric circular saw, angle grinding machine type electric tool button with hand lower rotary shaft, output main axis is pinned in the locating slot (or locating hole) inserting output gear with rotating shaft clamping block (or stop pin), unclamp the clamping screw exporting spindle end again with die nut, thus reach the object realizing changing saw blade or grinding wheel.This mode of operation hand will hold machine simultaneously also will by lower rotary shaft locking press button, another hand die nut unclamps clamping screw, operate not very convenient, and likely export main shaft and need rotate a circle and rotating shaft clamping block (or stop pin) could be inserted in the locating slot (or locating hole) of output gear, and rotating shaft clamping block (or stop pin) is easy to wear.
Summary of the invention
Technical problem to be solved by this invention is just to provide a kind of electric tool and rotating shaft self-locking device, make AC and DC electric circular saw, angle grinding machine type electric tool product that rotating shaft self-locking device is installed, when changing the working head such as saw blade or grinding wheel, operation is more reliably quick and easy, and can realize one-handed performance.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of electric tool rotating shaft self-locking device, comprise and export main shaft and be located at the output gear exported on main shaft, described output gear is located in gear-box, described output main shaft passes from gear-box delivery outlet, circumferential angle locking structure is provided with between described output main shaft and output gear endoporus, described circumferential angle locking structure makes output main shaft free to rotate within the scope of certain angle relative to output gear, described output main shaft cylindrical is provided with self-locking drives structure, described self-locking drives structure at output main shaft as driving self-locking bearing pin to export main shaft during driving link and output gear is locked.
Preferably, described circumferential angle locking structure comprises the lock plane exporting and main shaft cylindrical is arranged, and the corresponding lock plane of described output gear endoporus is provided with V-type convex surface.
Preferably, described self-locking drives structure is export the self-locking wedge surface that main shaft cylindrical is arranged.
Preferably, the corresponding described self-locking bearing pin of described output gear is provided with pin groove, and described self-locking bearing pin is positioned at pin groove.
Preferably, axle retainer is provided with in described gear-box delivery outlet.
Preferably, described axle retainer is provided with positioning tooth along cylindrical side, and the corresponding described positioning tooth of described gear-box delivery outlet endoporus is provided with locating slot.
In addition, a kind of electric tool, comprises electric machine assembly and output mechanism, and described electric machine assembly is provided with motor output shaft, and described motor output shaft drives described output mechanism, and described output mechanism arranges above-mentioned rotating shaft self-locking device.
Preferably, described electric tool is electric circular saw or angle grinding machine type electric tool.
Preferably, described motor output shaft and output gear direct-drive, described motor output shaft directly processes the output gear engaged with output gear.
Preferably, described output front-end of spindle passes from gear-box, and described output front-end of spindle is provided with clip plate and outer plate, and described saw blade or grinding wheel to be located between outer plate and clip plate and to be locked by clamping screw.
The present invention is owing to adopting technique scheme, compared with prior art have the following advantages: AC and DC electric circular saw, angle grinding machine type electric tool product, after rotating shaft self-locking device described in employing, when making to change the working head such as saw blade or grinding wheel, operation is more reliably quick and easy, and can realize one-handed performance.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is electric tool overall construction drawing (for electric circular saw) of the present invention;
Fig. 2 is rotating shaft self-locking device position sectional structure chart;
Fig. 3 is locking process state one schematic diagram of rotating shaft self-locking device when working;
Fig. 4 is locking process state two schematic diagram of rotating shaft self-locking device when working;
Fig. 5 is locking process state three schematic diagram of rotating shaft self-locking device when working;
Fig. 6 is locking process state four schematic diagram of rotating shaft self-locking device when working.
Detailed description of the invention
See the electric circular saw shown in Fig. 1 to Fig. 6, angle grinding machine type electric tool and rotating shaft self-locking device thereof.
Rotating shaft self-locking device wherein, comprise and export main shaft 11 and be located at the output gear 12 exported on main shaft 11, described output gear 12 is located in gear-box 10, this gear-box 10 comprises gear housing 101 and gear box cover 102, described output main shaft 11 passes from gear-box delivery outlet, be provided with circumferential angle locking structure between described output main shaft 11 and output gear endoporus, described output main shaft cylindrical is provided with self-locking drives structure.
Wherein said circumferential angle locking structure makes output main shaft 11 free to rotate within the scope of certain angle relative to output gear 12, and described self-locking drives structure is locked with output gear 12 as driving self-locking bearing pin 14 will export main shaft 11 during driving link at output main shaft 11.
Concrete, described circumferential angle locking structure comprises the lock plane 111 exporting and main shaft 11 cylindrical is arranged, and the corresponding lock plane of described output gear endoporus is provided with V-type convex surface 121.By arranging the angle of V-type convex surface 121, export main shaft 11 and freely can rotate in the angular range of setting relative to output gear 12, this circumferential angle locking structure is relatively simple, and locking angle is accurate, and locking effect is good.And described self-locking drives structure is export the self-locking wedge surface 112 that main shaft cylindrical is arranged, in output main shaft 11 active rotation process, it is locked with output gear 12 that self-locking wedge surface 112 drives self-locking bearing pin 14 motion will export main shaft 11, and this self-locking structure is relatively simple, and self-locking is effective.Wherein lock plane 111, self-locking wedge surface 112 all arrange two, and both all 180 degree, interval settings on output main shaft cylindrical, and lock plane 111, self-locking wedge surface 112 stagger exporting on main shaft cylindrical.
The corresponding described self-locking bearing pin 14 of described output gear 12 is provided with pin groove 122, and described self-locking bearing pin 14 is positioned at pin groove 122, and two arc boss 123 that pin groove 122 is protruded forward by output gear 12 enclose and form.Axle retainer 13 is provided with in described gear-box delivery outlet.Described axle retainer 13 is provided with positioning tooth 131 along cylindrical side, and the corresponding described positioning tooth of described gear-box delivery outlet endoporus is provided with locating slot, and positioning tooth 131 is positioned in locating slot.Two arc boss 123 can drive self-locking bearing pin 14 to rotate between axle retainer 13 and output main shaft 11 with output gear 12.
A kind of electric tool of concrete above-mentioned rotating shaft self-locking device, comprises electric machine assembly 2 and output mechanism 1, and described electric machine assembly 2 is provided with motor output shaft 21, and described motor output shaft 21 drives described output mechanism 1.Described electric tool is electric circular saw or angle grinding machine type electric tool.
Described motor output shaft 21 and output gear 12 direct-drive, described motor output shaft 21 directly processes the output gear 211 engaged with output gear, and structure is simple, avoids increasing gear on motor output shaft.Described output main shaft 11 front end passes from gear-box, axle retainer 13 is arranged on gear box cover 102, can not rotate with gear box cover 102 is fixing, described output main shaft 11 front end is provided with clip plate 15 and outer plate 16, and described saw blade or grinding wheel 3 to be located between outer plate 16 and clip plate 15 and to be locked by clamping screw 17.
Owing to being provided with circumferential angle locking structure, export main shaft 11 and freely can rotate in the scope of ± 7.5 ° relative to output gear 12, certainly concrete angular range can do further change; The output torque of motor can be delivered to by output gear 12 and export main shaft 11 by rotating shaft self-locking device, but conversely when the moment of torsion back transfer of output main shaft 11 is to output gear 12, described rotating shaft self-locking device can locked output main shaft 11, output main shaft 11 can not be rotated, thus realize unclamping clamping screw 17 and inside and outside pressing plate to change the working head such as saw blade or grinding wheel.
When from outside clockwise or rotate counterclockwise export main shaft 11 time, exporting main shaft 11 is driving link, output gear 12 falls behind output 7.5 °, main shaft and rotates with output main shaft 11, export between main shaft 11 and axle retainer 13 and form self-locking wedge surface 112, self-locking bearing pin 14 is positioned at the small end of self-locking wedge surface 112 by drag effect, and oriented small end continues the trend of motion, when the small end of self-locking wedge surface 112 is less than the diameter of self-locking bearing pin 14, pinning is exported main shaft 11 and can not rotate by this rotating shaft self-locking device, thus the tight bolt of realization die nut releasable lock 17 and interior, outer plate changes the working head such as saw blade or grinding wheel.
As shown in Figure 5 and Figure 6, when motor output shaft 211 rotation drives output gear 12 to rotate, output gear 12 is driving link, output gear 12 is after output main shaft 11 freely rotates 7.5 °, output main shaft 11 can be driven to rotate together, two arc boss 123 simultaneously on output gear 12 promote two self-locking bearing pins 14 and rotate together in axle retainer 13 and be not lockable, and so just can realize power and be delivered to output main shaft 11 from output gear 12.
Rotating shaft self-locking device of the present invention is applied to AC and DC electric circular saw, angle grinding machine type electric tool product, makes the operation when changing the working head such as saw blade or grinding wheel of this series products more reliably quick and easy, and can one-handed performance be realized.
Claims (10)
1. an electric tool rotating shaft self-locking device, comprise and export main shaft and be located at the output gear exported on main shaft, described output gear is located in gear-box, described output main shaft passes from gear-box delivery outlet, it is characterized in that: between described output main shaft and output gear endoporus, be provided with circumferential angle locking structure, described circumferential angle locking structure makes output main shaft free to rotate within the scope of certain angle relative to output gear, described output main shaft cylindrical is provided with self-locking drives structure, described self-locking drives structure at output main shaft as driving self-locking bearing pin to export main shaft during driving link and output gear is locked.
2. a kind of electric tool rotating shaft self-locking device according to claim 1, is characterized in that: described circumferential angle locking structure comprises the lock plane exporting and main shaft cylindrical is arranged, and the corresponding lock plane of described output gear endoporus is provided with V-type convex surface.
3. a kind of electric tool rotating shaft self-locking device according to claim 2, is characterized in that: described self-locking drives structure is export the self-locking wedge surface that main shaft cylindrical is arranged.
4. a kind of electric tool rotating shaft self-locking device according to claim 3, is characterized in that: the corresponding described self-locking bearing pin of described output gear is provided with pin groove, and described self-locking bearing pin is positioned at pin groove.
5. a kind of electric tool rotating shaft self-locking device according to Claims 1-4 any one, is characterized in that: be provided with axle retainer in described gear-box delivery outlet.
6. a kind of electric tool rotating shaft self-locking device according to claim 5, is characterized in that: described axle retainer is provided with positioning tooth along cylindrical side, and the corresponding described positioning tooth of described gear-box delivery outlet endoporus is provided with locating slot.
7. an electric tool, comprise electric machine assembly and output mechanism, described electric machine assembly is provided with motor output shaft, and described motor output shaft drives described output mechanism, it is characterized in that: described output mechanism arranges the rotating shaft self-locking device described in claim 1 to 6 any one.
8. a kind of electric tool according to claim 7, is characterized in that: described electric tool is electric circular saw or angle grinding machine type electric tool.
9. a kind of electric tool according to claim 7, is characterized in that: described motor output shaft and output gear direct-drive, described motor output shaft directly processes the output gear engaged with output gear.
10. a kind of electric tool according to claim 7, it is characterized in that: described output front-end of spindle passes from gear-box, described output front-end of spindle is provided with clip plate and outer plate, and described saw blade or grinding wheel to be located between outer plate and clip plate and to be locked by clamping screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510338046.9A CN104985572A (en) | 2015-06-17 | 2015-06-17 | Self-locking device for electric tool and rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510338046.9A CN104985572A (en) | 2015-06-17 | 2015-06-17 | Self-locking device for electric tool and rotating shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104985572A true CN104985572A (en) | 2015-10-21 |
Family
ID=54297525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510338046.9A Pending CN104985572A (en) | 2015-06-17 | 2015-06-17 | Self-locking device for electric tool and rotating shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104985572A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108908027A (en) * | 2018-06-06 | 2018-11-30 | 浙江开创电气有限公司 | Hand-held angle grinder |
| CN109715346A (en) * | 2016-07-26 | 2019-05-03 | 罗伯特·博世有限公司 | Guidance attachment for rotary power tool |
| WO2021031323A1 (en) * | 2019-08-22 | 2021-02-25 | 锐奇控股股份有限公司 | Device for preventing false triggering of self-locking mechanism of spindle of electric tool |
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| US20020101106A1 (en) * | 2001-02-01 | 2002-08-01 | Kim Stephen E. | No-back drive mechanism for use with aircraft seat actuators |
| CN1375381A (en) * | 2001-03-14 | 2002-10-23 | 中村大治郎 | Power tool and spindle locking system |
| CN1437522A (en) * | 2000-04-18 | 2003-08-20 | 布莱克-德克尔公司 | Power driven rotary device |
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Patent Citations (11)
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| CN1437522A (en) * | 2000-04-18 | 2003-08-20 | 布莱克-德克尔公司 | Power driven rotary device |
| US20020101106A1 (en) * | 2001-02-01 | 2002-08-01 | Kim Stephen E. | No-back drive mechanism for use with aircraft seat actuators |
| CN1375381A (en) * | 2001-03-14 | 2002-10-23 | 中村大治郎 | Power tool and spindle locking system |
| CN1789741A (en) * | 2004-11-16 | 2006-06-21 | 罗伯特·博世有限公司 | Slaving and blocking device |
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| JP2008121848A (en) * | 2006-11-15 | 2008-05-29 | Ntn Corp | Reverse input prevention clutch |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109715346A (en) * | 2016-07-26 | 2019-05-03 | 罗伯特·博世有限公司 | Guidance attachment for rotary power tool |
| CN109715346B (en) * | 2016-07-26 | 2022-05-24 | 罗伯特·博世有限公司 | Guide attachment for rotary power tool |
| CN108908027A (en) * | 2018-06-06 | 2018-11-30 | 浙江开创电气有限公司 | Hand-held angle grinder |
| WO2021031323A1 (en) * | 2019-08-22 | 2021-02-25 | 锐奇控股股份有限公司 | Device for preventing false triggering of self-locking mechanism of spindle of electric tool |
| US12030167B2 (en) | 2019-08-22 | 2024-07-09 | Ken Holding Co., Ltd. | False triggering prevention device for spindle self-locking mechanism of electric tool |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151021 |
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| RJ01 | Rejection of invention patent application after publication |