CN200970762Y - Automatic locking mechanism for output shaft of electric tool - Google Patents
Automatic locking mechanism for output shaft of electric tool Download PDFInfo
- Publication number
- CN200970762Y CN200970762Y CN 200620125706 CN200620125706U CN200970762Y CN 200970762 Y CN200970762 Y CN 200970762Y CN 200620125706 CN200620125706 CN 200620125706 CN 200620125706 U CN200620125706 U CN 200620125706U CN 200970762 Y CN200970762 Y CN 200970762Y
- Authority
- CN
- China
- Prior art keywords
- cam
- fan
- output shaft
- retainer ring
- arc surface
- 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.)
- Expired - Fee Related
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- Drilling And Boring (AREA)
Abstract
An automatic locking machine for the output shaft of an electric tool relates to the automatic locking technology of the output shaft of the electric tool. Six fan shape lug bosses which have the equal distance to the center of a dial are arranged outside the middle hole of the dial. The inner circularity of a fixing ring is sleeved on the outer arc surface of the lug boss; the main body of a cam is arranged with an outer circularity arc surface, the outer edge of the cam is distributed evenly with three fan shape projections outwards radially; the cam is sleeved at the inner side of the fixing ring, and the outer arc surface of each fan shape projection is matched with the inner circularity surface of the fixing ring, fan shape lug bosses with two dials are arranged between the two adjacent projections; locking pins are respectively positioned in the space surrounded by two fan shape lug bosses, the plane of the cam and the inner circularity of the fixing ring. The output shaft can be driven to rotate synchronously by that a motor driving the dial; when the motor stops working, the output shaft can be rotated to form a locking, but not form a reversion for the main shaft of the motor, thereby forming the protection for the motor to achieve the convenient changes for different driving components.
Description
Technical field
The utility model relates to the device that a kind of electric tool output shaft automatically locks.
Background technology
Electric tool is a power with the motor normally, orders about the assembly that is driven that is combined in the electric tool chuck end and rotates, and realizes various manufacturing process.Because electric tool usually not only as simple function, after changing the different driving assembly, just can have different functions, becomes bottle opener as bit change-over, or is replaced with die nut.Or even, make that dismountings such as drill bit or bottle opener, spanner are inconvenient because this output shaft has indeterminate state free to rotate; Do the time spent at performance bottle opener or spanner, when particularly screw being unscrewed,, often can not change easily though the function of counter-rotating back-out is arranged usually with a subdivision desire.Reason is: the screw of having locked can not be got loose by the electric screw driver that quick counter-rotating drives under maximum static friction force, if rotary manipulation in addition obstinately often causes screw terminal to wreck, causes the screw of having locked can't to be drawn off fully.
The utility model content
The purpose of this utility model provides a kind of electric tool output shaft automatic locking mechanism that is convenient for changing the different driving assembly.
The utility model comprises a rotating disk, a retainer ring, a cam, an output shaft and three stop pins, the center of rotating disk is provided with mesopore, outside the rotating disk mesopore, be provided with and equidistant six the fan-shaped boss of center of turntable, the lower surface of described retainer ring is supported on the rotating disk in six fan-shaped boss outsides, and the interior circle of retainer ring is enclosed within outside the extrados of each fan-shaped boss; Described cam body is provided with exterior arc surface, and cam center is provided with the mounting hole that can connect output shaft, three outside fan-shaped protrusions of cam outer rim radial equipartition; Cam is nested with the inboard at retainer ring, and the extrados of each fan-shaped protrusion is engaged in the inner headed face of retainer ring, be provided with the fan-shaped boss of two rotating disks between adjacent two protrusions, the intrados of fan-shaped boss matches with the cam exterior arc surface, and a plane is arranged on the exterior arc surface between two fan-shaped protrusions; Stop pin is placed on respectively in the space that the interior circle by the plane of two fan-shaped boss, cam and retainer ring surrounds.
When being fixed on retainer ring on the casing, drive rotating disk, can drive output shaft and rotate synchronously by motor; When motor quit work, rotary output axis can form locking, can not form the counter-rotating to motor spindle, and motor is formed protection, reached the purpose that makes things convenient for the different driving unit replacement, but quick and convenient ground is dismantled, more bit change, tapered end or bottle opener are first-class.
Description of drawings
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is the exploded view of Fig. 1;
Fig. 3 is an end view drawing of the present utility model.
The specific embodiment
As shown in the figure, the utility model comprises a rotating disk 1, retainer ring 2, cam 3, output shaft 4 and three stop pins 5,6,7.
The center of rotating disk 1 is provided with mesopore 1-1, and equidistant six the fan-shaped boss 1-2 in center with rotating disk 1 are set outside rotating disk mesopore 1-1.
The lower surface of retainer ring 2 is supported on the rotating disk 1 in six fan-shaped boss 1-2 outsides, and the interior circle of retainer ring 2 is nested with outside the extrados of each fan-shaped boss 1-2.
Three stop pins 5,6,7 are separately positioned between two fan-shaped boss 1-2 in two adjacent fan-shaped protrusion 3-3 and between the interior circle of the plane 3-4 of cam 3 and retainer ring 2.
Claims (1)
1, a kind of electric tool output shaft automatic locking mechanism, comprise a rotating disk, a retainer ring, a cam, an output shaft and three stop pins, the center of rotating disk is provided with mesopore, it is characterized in that: outside the rotating disk mesopore, be provided with and equidistant six the fan-shaped boss of center of turntable, the lower surface of described retainer ring is supported on the rotating disk in six fan-shaped boss outsides, and the interior circle of retainer ring is enclosed within outside the extrados of each fan-shaped boss; Described cam body is provided with exterior arc surface, and cam center is provided with the mounting hole that can connect output shaft, three outside fan-shaped protrusions of cam outer rim radial equipartition; Cam is nested with the inboard at retainer ring, and the extrados of each fan-shaped protrusion is engaged in the inner headed face of retainer ring, be provided with the fan-shaped boss of two rotating disks between adjacent two protrusions, the intrados of fan-shaped boss matches with the cam exterior arc surface, and a plane is arranged on the exterior arc surface between two fan-shaped protrusions; Stop pin is placed on respectively in the space that the interior circle by the plane of two fan-shaped boss, cam and retainer ring surrounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620125706 CN200970762Y (en) | 2006-11-20 | 2006-11-20 | Automatic locking mechanism for output shaft of electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620125706 CN200970762Y (en) | 2006-11-20 | 2006-11-20 | Automatic locking mechanism for output shaft of electric tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200970762Y true CN200970762Y (en) | 2007-11-07 |
Family
ID=38882020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620125706 Expired - Fee Related CN200970762Y (en) | 2006-11-20 | 2006-11-20 | Automatic locking mechanism for output shaft of electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200970762Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102186632B (en) * | 2008-10-14 | 2016-01-20 | 罗伯特·博世有限公司 | There is the hand held power machine of automatic spindle locking |
-
2006
- 2006-11-20 CN CN 200620125706 patent/CN200970762Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102186632B (en) * | 2008-10-14 | 2016-01-20 | 罗伯特·博世有限公司 | There is the hand held power machine of automatic spindle locking |
| US10086507B2 (en) | 2008-10-14 | 2018-10-02 | Robert Bosch Gmbh | Hand-held machine tool having automatic shaft locking |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071107 Termination date: 20151120 |
|
| EXPY | Termination of patent right or utility model |