CN201067880Y - Impact electric wrench - Google Patents
Impact electric wrench Download PDFInfo
- Publication number
- CN201067880Y CN201067880Y CNU200720111923XU CN200720111923U CN201067880Y CN 201067880 Y CN201067880 Y CN 201067880Y CN U200720111923X U CNU200720111923X U CN U200720111923XU CN 200720111923 U CN200720111923 U CN 200720111923U CN 201067880 Y CN201067880 Y CN 201067880Y
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- China
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- steel ball
- impact
- impact block
- block
- hammer body
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- Expired - Fee Related
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Abstract
An impact type electric wrench is characterized in that the casing of the electric wrench is provided with a switch and a motor which drives a transmission mechanism which drives a centrifugal impact mechanism. The centrifugal impact mechanism comprises a hammer block, an impact block and a pin roll, and the corresponding position of the impact block and the hammer block is provided with a steel ball jamming device which comprises a steel ball pit and a chamber holding the steel ball and a pressure spring. The back end of the centrifugal impact mechanism is provided with a torque output shaft and the steel ball jamming device is provided with a spiral adjusting device to adjust the pressure of the pressure spring. By adjusting the pressure of the pressure spring, the jamming force of the steel ball to the impact block can be adjusted, thus leading to the corresponding change of the critical speed of the impact block in the process of impacting the torque output shaft, so as to eliminate the influence of the machining errors of all parts in the process of manufacture and ensure the consistency of output impact torque in the process of batch production.
Description
Technical field
The utility model relates to a kind of electric impact wrench.
Background technology
At present, electric impact wrench comprises: casing, switch, motor, transmission mechanism, hammer body, impact block, bearing pin, torsion output shaft and be provided with by steel ball hole on impact block and hammer body corresponding site and have the steel ball positioner that the cavity volume of steel ball and stage clip constitutes; Because the influence of component processing errors such as impact block, hammer body, bearing pin and stage clip, the output impulsive torque uniformity of criticizing electric wrench when producing is relatively poor, big is big, little is little, moment of torsion can only lean on the method for inconveniences such as shimming or replacing spring to regulate, production efficiency is low, is difficult to guarantee the uniformity of product lot quantity.
Summary of the invention
The purpose of this utility model is: a kind of electric impact wrench of regulating output torque when being convenient to produce in batches, guaranteeing the output torque size identical property is provided.
The utility model is achieved through the following technical solutions:
A kind of electric impact wrench, be provided with motor and switch in the casing of electric wrench, the driven by motor transmission mechanism, transmission mechanism drives centrifugal beater mechanism, centrifugal beater mechanism comprises: hammer body, impact block, bearing pin, impact block and hammer body corresponding site are provided with the steel ball positioner, the steel ball positioner comprises: the cavity volume of steel ball and stage clip is cheated and had to steel ball, centrifugal beater mechanism rear end is provided with the torsion output shaft, it is characterized in that: described steel ball positioner is provided with the spiral regulating device of regulating stage clip pressure.
Advantage of the present utility model is: because the steel ball positioner is provided with the spiral regulating device of regulating stage clip pressure, by regulating the pressure of stage clip, can regulate the screens power of steel ball impact piece, critical speed when making the impact torsion output shaft of impact block is done corresponding change, to eliminate the influence of component processing errors such as manufacturing process impact block, hammer body, bearing pin and stage clip, the uniformity of the impulsive torque of product output when guaranteeing to produce in batches.
In the utility model, described spiral regulating device comprise the screw thread be located in the cavity volume and with the adjusting bolt of this threads engaged.Above-mentioned spiral regulating device is simple in structure, regulates output torque when being convenient to produce in batches, in production and maintenance process, only needs just can adjust the moment of torsion of torsion output shaft output comparatively easily with revolving tool, so also just can satisfy industrial production requirement.
In the utility model, described cavity volume is arranged in the impact block, and correspondingly the steel ball hole is arranged on the hammer body sidewall.Certainly, cavity volume also can be arranged in the hammer body, and correspondingly the steel ball hole is arranged on the impact block sidewall.
In the utility model, described impact block is provided with extension spring or torsion spring.By extension spring or torsion spring are set at impact block, drag torque that stage clip or extension spring produce on impact block or torsional moment and less steel ball screens moment stack, impact block centrifugal moment when being offset the electric wrench running guarantees that the torsion output shaft has bigger output torque.
Description of drawings
Fig. 1 is the structural representation of embodiment 1 of the present utility model.
Fig. 2 is the A-A generalized section of Fig. 1.
The specific embodiment
In conjunction with Fig. 1, shown in Figure 2: the electric impact wrench of present embodiment comprises: a kind of electric impact wrench, be provided with motor 3 and switch 2 in the casing 1 of electric wrench, driven by motor transmission mechanism 4, transmission mechanism drives centrifugal beater mechanism, centrifugal beater mechanism comprises: hammer body 5, impact block 6, bearing pin 7, impact block and hammer body corresponding site are provided with the steel ball positioner, the steel ball positioner comprises: steel ball hole 9 and the cavity volume 12 that has steel ball 10 and stage clip 11, centrifugal beater mechanism rear end is provided with torsion output shaft 8, and the steel ball positioner is provided with the spiral regulating device of regulating stage clip pressure.Spiral regulating device comprises: be located in the cavity volume screw thread and with the adjusting bolt 13 of this threads engaged.Spiral regulating device can directly be regulated the pressure of stage clip.Transmission mechanism 4 is constituting by gear or clutch or they.
Among Fig. 1, Fig. 2, described cavity volume is arranged in the impact block, and correspondingly the steel ball hole is arranged on the hammer body sidewall.Certainly, cavity volume also can be arranged in the hammer body, and correspondingly the steel ball hole is arranged on the impact block sidewall.
The course of work of present embodiment is as follows: when pressing switch 2 and make switch 2 be in closed state, the starting of motor 3 forward or reverse, driving hammer body 5 by transmission mechanism 4 begins to rotate, the suffered centrifugal moment of impact block 6 this moment is less than by stage clip 11, steel ball 10, the steel ball hole 9 steel ball screens moments that apply, and impact block 6 can't fly out; When rotating speed reaches certain value, the suffered centrifugal moment of impact block 6 is greater than steel ball screens moment, the center of gravity of impact block 6 will fly out away from the pivot of bearing pin 7, the scope of attack of impact block 6 impact torsion output shafts 8, make 8 rotations of torsion output shaft or export certain torsion, reach the effect of elasticity bolt nut, this moment, cut-off switch 2 got final product, impact block 6 resets, and this has just finished the one-shot process.
Main points of the present utility model are: also be provided with the spiral regulating device of regulating stage clip pressure on the stage clip.This spiral regulating device can be directly to act on the stage clip, also can be that indirectly-acting is on stage clip.Steel ball hole can directly be done thereon as the part of impact block or hammer body, also can be separately be provided with part that steel ball cheats and impact block or hammer body as one and combines.The shape in steel ball hole can have varied, is not described further herein.
Certainly, also can be provided with extension spring or torsion spring on the impact block of present embodiment electric impact wrench.Guaranteeing under the certain prerequisite of torsion output shaft output torque, minimizing stage clip pressure can prolong stage clip and be subjected to load effect number of times, reduces the wearing and tearing of steel ball hole and steel ball, behind the assurance impact block impact torsion output shaft, reset smoothly, can extension spring or torsion spring be set at impact block.
Claims (5)
1. electric impact wrench, be provided with motor and switch in the casing of electric wrench, the driven by motor transmission mechanism, transmission mechanism drives centrifugal beater mechanism, centrifugal beater mechanism comprises: hammer body, impact block, bearing pin, impact block and hammer body corresponding site are provided with the steel ball positioner, the steel ball positioner comprises: the cavity volume of steel ball and stage clip is cheated and had to steel ball, centrifugal beater mechanism rear end is provided with the torsion output shaft, it is characterized in that: described steel ball positioner is provided with the spiral regulating device of regulating stage clip pressure.
2. electric impact wrench according to claim 1 is characterized in that: described spiral regulating device comprise the screw thread be located in the cavity volume and with the adjusting bolt of this threads engaged.
3. electric impact wrench according to claim 1 is characterized in that: described cavity volume is arranged in the impact block, and correspondingly the steel ball hole is arranged on the hammer body sidewall.
4. electric impact wrench according to claim 1 is characterized in that: described cavity volume is arranged in the hammer body, and correspondingly the steel ball hole is arranged on the impact block sidewall.
5. electric impact wrench according to claim 1 is characterized in that: described impact block is provided with extension spring or torsion spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720111923XU CN201067880Y (en) | 2007-07-14 | 2007-07-14 | Impact electric wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720111923XU CN201067880Y (en) | 2007-07-14 | 2007-07-14 | Impact electric wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201067880Y true CN201067880Y (en) | 2008-06-04 |
Family
ID=39489253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720111923XU Expired - Fee Related CN201067880Y (en) | 2007-07-14 | 2007-07-14 | Impact electric wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201067880Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104608099A (en) * | 2013-11-04 | 2015-05-13 | 南京德朔实业有限公司 | Electric tool for outputting torque |
-
2007
- 2007-07-14 CN CNU200720111923XU patent/CN201067880Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104608099A (en) * | 2013-11-04 | 2015-05-13 | 南京德朔实业有限公司 | Electric tool for outputting torque |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080604 Termination date: 20100714 |