CN201061873Y - High torque force impact structure of power tool - Google Patents
High torque force impact structure of power tool Download PDFInfo
- Publication number
- CN201061873Y CN201061873Y CNU2007201553680U CN200720155368U CN201061873Y CN 201061873 Y CN201061873 Y CN 201061873Y CN U2007201553680 U CNU2007201553680 U CN U2007201553680U CN 200720155368 U CN200720155368 U CN 200720155368U CN 201061873 Y CN201061873 Y CN 201061873Y
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- China
- Prior art keywords
- hammering
- output shaft
- hammer
- piece
- seat
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Abstract
The utility model relates to a high torsion impact structure of an electric tool, comprising a hammer base, a hammer block, a drive shaft, and an output shaft. The hammer block and the hammer base are mutually combined, which enables the hammer block to relatively axially move in the hammer base. A return spring is arranged between the hammer base and the hammer block. The hammer block is driven by the drive shaft to rotate, which can simultaneously drive the hammer base to rotate when rotating, and an impact block which is arranged on the hammer block strikes a projection on the output shaft to force the output shaft to rotate continuously, the hammer block stops to rotate as a result of transient hindering in the process of striking, the hammer block axially moves along the hammer base and compresses the return spring as the drive shaft is under the continuous rotation state through the special connection structure of the hammer block and the drive shaft, the hammer block separates from the projection of the output shaft, and the hammer block is driven to rotate again, and generates impact to the output shaft when the return spring pushes the hammer block to the original position again.
Description
Technical field
The utility model relates to a kind of electric tool, refers in particular to a kind of high torsion impact structure that can produce bigger outputting torsion under the product of equal volume that has.
Background technology
Existing be used to bore, the electric tool of work such as lock, its structure is that the power with motor is delivered to output shaft via gear train, slows down or the speed changing function of speedup to reach; In addition, in order to allow screw lock tightlyer, or the screw of locking can successfully be unloaded, some bores, electric tool of lock usefulness also possesses impact function, thereby can lock screw tighter in the moment of lock screw, or make screw lax so that unload in the moment of unloading screw.
Fig. 1 and Fig. 2 produce the mechanism of torsion and percussion action for showing existing electric tool, and it includes: a power transmission shaft 1, a hammering piece A, a back-moving spring B, with an output shaft 5; Wherein, this hammering piece A is the circular metal piece with suitable quality, and its front end face is provided with the impact block A1 that protrudes in relative both sides, and forms an internal diameter in the central authorities of hammering piece A, and this internal diameter then is provided with helical groove A2.Output shaft 5 is provided with positioning bead 53 near the set hole 52 of the sidewall of front end, and the front end of output shaft 5 can be for plugging such as the first-class instrument of screwdriver, and by positioning bead 53 instrument is fixed, and the rear end of output shaft 5 then is provided with the projection 51 that is positioned at relative both sides.Be connected to actuating unit behind the rear end compound gasket 14 of power transmission shaft 1 and the bearing 15, its external diameter surface is provided with spiral goove 11, this power transmission shaft 1 passes a pad 12, a back-moving spring B, a pad 12A and described hammering piece A in regular turn, and insert ball A3 between this spiral goove 11 and the helical groove A2 and form one cooperate right.In addition, be provided with a plurality of balls 13 between the rear end of hammering piece A and the pad 12A; The two ends of back-moving spring B are butted on pad 12 and 12A respectively, as the bearing between pad 12A and the hammering piece A, make hammering piece A to rotate with respect to back-moving spring B by ball 13.
When described power transmission shaft 1 is subjected to actuating unit and drives rotation, can rotate by placing ball A3 between spiral goove 11 and helical groove A2 to drive hammering piece A, because of the projection 51 of impact block A1 on the hammering piece A and output shaft 5 chimeric mutually, so output shaft 5 is driven in rotation.Output shaft 5 stops the rotation because of resistance strengthens gradually in work, the projection 51 that this moment, impact block A1 can high speed impact output shaft both sides, and then produce great impact torsion and force output shaft to continue rotation.Hammering piece A stops operating because of of short duration being obstructed in impact process, and main shaft continues rotation, its chimeric mutually spiral goove 11 makes hammering piece A move axially and compression reseting spring B towards the direction of power transmission shaft 1 with helical groove A2 generation effect, when making impact block A1, separates hammering piece A shift length with output shaft 5 both sides projections 51, hammering piece A is subjected to the elastic force effect of back-moving spring B again and after the homing, produces impact next time then.
The torsion impact structure of aforementioned existing electric tool, because must moving axially big distance, its hammering piece A just can make impact block A1 break away from the projection 51 of output shaft 5, therefore must in electric tool, reserve bigger displacement space S1 (consulting shown in Figure 2), thus, the stool and urine of this hammering piece A can be subjected to the restriction on the space.
The utility model content
Main purpose of the present utility model is to provide a kind of torsion impact structure of improveing aforementioned electric tool, making the hammering piece can make full use of usage space allows volume be increased to maximum, reduce the space that the hammering piece moves simultaneously, gross weight by the hammering piece strengthens, and makes under the product of equal volume and can obtain bigger outputting torsion.
Based on this, technological means of the present utility model includes a hammering seat, has space in, and front end in space forms an opening in this, and the rear end has the bottom surface, and the two lateral walls of this hammering seat is provided with the notch that extends axially a degree of depth;
One back-moving spring places the interior space of this hammering seat;
One hammering piece, the relative both sides of its external diameter are respectively equipped with the impact block that moves freely in the notch that can be matched with described hammering seat;
One output shaft, its rear end have two projections that are positioned at relative both sides;
One power transmission shaft passes described hammering seat, back-moving spring and hammering piece, and is connected in this hammering piece and can drives the rotation of this output shaft.
The external diameter of described power transmission shaft is provided with spiral goove, and this hammering piece has an internal diameter, and this internal diameter is provided with helical groove, and this spiral goove and this helical groove form one and cooperate rightly, are provided with ball between this spiral goove and the helical groove.
Described back-moving spring is not when being under pressure, and the part of this impact block is given prominence to described notch, when this hammering piece when rotated, mutually chimeric being allowed of the impact block on the hammering piece and the projection of output shaft makes described output shaft rotation; When output shaft stopped the rotation, the main shaft that continues rotation can make described hammering piece move axially and compression reseting spring with respect to described hammering seat, makes this impact block break away from described projection.
In the high torsion impact structure of the utility model electric tool, described hammering piece and hammering seat make up mutually, the hammering piece can relatively be moved axially in the hammering seat, be provided with back-moving spring between hammering seat and the hammering piece, this back-moving spring can promote the hammering piece and make its impact block give prominence to the hammering seat under the state that is not under pressure; Described hammering piece is subjected to power transmission shaft driving and rotates, this hammering piece can drive the rotation of hammering seat when rotated simultaneously, when output shaft is subjected to resistance and stops the rotation, the impact block of being located on the hammering piece is impacted the projection on the output shaft and forces output shaft to continue rotation, the hammering piece stops operating because of of short duration being obstructed in impact process, by the special syndeton between itself and the power transmission shaft, make power transmission shaft under the state that continues rotation, the hammering piece moves axially with respect to the hammering seat and compresses this back-moving spring, cause impact block to break away from the projection of output shaft, treat back-moving spring with the hammering piece once more during pushed home, then the hammering piece is activated rotation once more and output shaft is produced and impacts.
The beneficial effects of the utility model are, the utility model makes up mutually with a hammering seat and a hammering piece and replaces existing single hammering piece, hammering seat wherein only can rotate and can't move axially, the hammering piece then can be subjected to the hammering seat and drive rotation, and can move axially with respect to the hammering seat, thereby the space that moves down of hammering piece is reduced, relatively needing to reserve its displacement space also can reduce, therefore can obtain maximum volume after this hammering piece and the addition of hammering seat, cause gross weight to increase, can under the product of equal volume, obtain bigger outputting torsion.
Description of drawings
Fig. 1 is the three-dimensional exploded view of each combination of components relation of the impact type drive mechanism of existing electric tool;
Fig. 2 is the section plan of the impact type drive mechanism of existing electric tool;
Fig. 3 is the embodiment three-dimensional exploded view that each combination of components of the high torsion impact structure of the utility model electric tool concerns;
Fig. 4 is the embodiment section plan of the high torsion impact structure of the utility model electric tool.
Wherein, description of reference numerals is as follows:
1 power transmission shaft
11 spiral gooves
12 pads
The 12A pad
13 balls
14 pads
15 bearings
2 hammering seats
Space in 21
22 notches
3 hammering pieces
31 impact blocks
32 helical grooves
33 balls
4 back-moving springs
5 output shafts
51 projections
52 holes
53 positioning beads
The S1 displacement space
The S2 displacement space
A hammering piece
The A1 impact block
The A2 helical groove
The A3 ball
The B back-moving spring
The specific embodiment
Below cooperate graphic and component symbol is done more detailed description to embodiment of the present utility model, after studying this specification carefully, can implement according to this so that be familiar with these those skilled in the art, wherein, components identical symbology components identical.
Consult Fig. 3 and Fig. 4, the utility model is used for the high torsion impact structure of electric tool, and its preferred embodiment includes a power transmission shaft 1, a hammering seat 2, a hammering piece 3, a back-moving spring 4 and an output shaft 5.Wherein, the cylindrical metal seat of hammering seat 2 for having suitable quality, it has space 21 in, and front end in space 21 forms an opening in this, and the rear end has the bottom surface, and the two lateral walls of this hammering seat 2 is provided with the notch 22 that extends axially a degree of depth.
The preferred embodiment of described hammering piece 3 is a cylindrical body, and the relative both sides of its external diameter are respectively equipped with the impact block 31 that moves freely in the notch 22 that can be matched with hammering seat 2, and its internal diameter then is provided with helical groove 32; When back-moving spring 4 when not being under pressure, the part of impact block 31 is given prominence to described notch 22.Preferred embodiment, this helical groove include two helical grooves 32 that are positioned at relative both sides.
The external diameter of described power transmission shaft 1 is provided with spiral goove 11, this spiral goove 11 preferably includes two, and be located at the position of relative both sides, it is right that this spiral goove 11 cooperates with described helical groove 32 formation one, this spiral goove 11 and helical groove 32 are formed cooperate between ball 33 then is set, make power transmission shaft 1 to drive 3 rotations of hammering pieces via being embedded in the ball 33 of spiral goove 11 with helical groove 32.
Described output shaft 5 is provided with positioning bead 53 near the set hole 52 of the sidewall of front end, and the front end of output shaft 5 can be for plugging such as the first-class instrument of screwdriver, and by positioning bead 53 instrument is fixed, and the rear end of output shaft 5 then is provided with the projection 51 that is positioned at relative both sides.
Be connected to actuating unit behind the rear end compound gasket 14 of power transmission shaft 1 and the bearing 15; The rear end of hammering seat 2 is provided with a plurality of balls 13 back recombinant one pads 12, and power transmission shaft 1 passes this pad 12, hammering seat 2, back-moving spring 4 and hammering piece 3 in regular turn, and between this spiral goove 11 and helical groove 32, insert ball 33 and form one cooperate right.When power transmission shaft 1 is subjected to actuating unit and drives rotation, can drive 3 rotations of hammering pieces by the ball 33 that places 32 of spiral goove 11 and helical grooves, because of the projection 51 of impact block on the hammering piece 3 31 and output shaft 5 chimeric mutually, so output shaft 5 is driven in rotation.Output shaft 5 stops the rotation because of resistance strengthens gradually in work, the projection 51 that this moment, impact block 31 can high speed impact output shaft both sides, and then produce great impact torsion and force output shaft 5 to continue rotation.Hammering piece 3 stops operating because of of short duration being obstructed in impact process, and main shaft continues rotation, its chimeric mutually spiral goove 11 makes hammering piece 3 move axially and compression reseting spring 4 towards the direction of power transmission shaft 1 with helical groove 32 generation effects, when making impact block 31, separate hammering piece 3 shift lengths with output shaft 5 both sides projections 51, hammering piece 3 is subjected to the elastic force effect of back-moving spring 4 again and after the homing, produces impact next time then.
The utility model is owing to increase gross weight in the Calais by the hammering seat mutually with the hammering piece, so can promote whole outputting torsion, again because hammering piece 3 only need be done short-range moving in hammering seat 2, so the space that electric tool will be reserved is less, making hammering piece of the present utility model can make full use of the space allows volume be increased to maximum, reduce the space that the hammering piece moves simultaneously, make under the product of equal volume and can obtain bigger outputting torsion.
The above only is in order to explain preferred embodiment of the present utility model; be not that attempt is done any pro forma restriction to the utility model according to this; therefore; everyly do relevant any modification of the present utility model or change in that identical creation spirit is following, all must be included within the scope of patent protection of the present utility model.
Claims (2)
1. the high torsion impact structure of an electric tool is characterized in that, includes a hammering seat, has space in, and front end in space forms an opening in this, and the rear end has the bottom surface, and the two lateral walls of this hammering seat is provided with the notch that extends axially a degree of depth;
One back-moving spring places the interior space of this hammering seat;
One hammering piece, the relative both sides of its external diameter are respectively equipped with the impact block that moves freely in the notch that can be matched with described hammering seat;
One output shaft, its rear end have two projections that are positioned at relative both sides;
One power transmission shaft passes described hammering seat, back-moving spring and hammering piece, and is connected in this hammering piece and can drives the rotation of this output shaft;
Described back-moving spring is not when being under pressure, and the part of this impact block is given prominence to described notch, when this hammering piece when rotated, mutually chimeric being allowed of the impact block on the hammering piece and the projection of output shaft makes described output shaft rotation; When output shaft stopped the rotation, the main shaft that continues rotation can make described hammering piece move axially and compression reseting spring with respect to described hammering seat, makes this impact block break away from described projection.
2. according to the high torsion impact structure of right 1 described electric tool, it is characterized in that, the external diameter of described power transmission shaft is provided with spiral goove, and this hammering piece has an internal diameter, this internal diameter is provided with helical groove, it is right that this spiral goove cooperates with this helical groove formation one, is provided with ball between this spiral goove and the helical groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201553680U CN201061873Y (en) | 2007-07-17 | 2007-07-17 | High torque force impact structure of power tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201553680U CN201061873Y (en) | 2007-07-17 | 2007-07-17 | High torque force impact structure of power tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201061873Y true CN201061873Y (en) | 2008-05-21 |
Family
ID=39450241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201553680U Expired - Fee Related CN201061873Y (en) | 2007-07-17 | 2007-07-17 | High torque force impact structure of power tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201061873Y (en) |
-
2007
- 2007-07-17 CN CNU2007201553680U patent/CN201061873Y/en not_active Expired - Fee Related
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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: 20080521 Termination date: 20100717 |