CN1792561A - Hammer mechanism for a power tool - Google Patents
Hammer mechanism for a power tool Download PDFInfo
- Publication number
- CN1792561A CN1792561A CN200510135807.7A CN200510135807A CN1792561A CN 1792561 A CN1792561 A CN 1792561A CN 200510135807 A CN200510135807 A CN 200510135807A CN 1792561 A CN1792561 A CN 1792561A
- Authority
- CN
- China
- Prior art keywords
- hollow piston
- crank
- electric tool
- guide rods
- hammer
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims description 13
- 210000000038 chest Anatomy 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/06—Hammer pistons; Anvils ; Guide-sleeves for pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D11/00—Portable percussive tools with electromotor or other motor drive
- B25D11/06—Means for driving the impulse member
- B25D11/12—Means for driving the impulse member comprising a crank mechanism
- B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
- B25D2216/0007—Details of percussion or rotation modes
- B25D2216/0015—Tools having a percussion-only mode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
- B25D2216/0007—Details of percussion or rotation modes
- B25D2216/0023—Tools having a percussion-and-rotation mode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
- B25D2216/0007—Details of percussion or rotation modes
- B25D2216/0038—Tools having a rotation-only mode
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
An output shaft (18) of a motor (16) rotates a pinion (20). The pinion (20) has gear teeth (not shown) which are intermeshed with the gear teeth (not shown) of a second gear (24). As a result, the second gear (24) which is mounted to a drive shaft (28) rotates. A crank plate (38) having an eccentrically disposed crank pin (40) is mounted to the top of the drive shaft (28). A crank arm (42) is pivotally connected to the crank pin (40) and to the underside of a hollow piston (44). A hollow piston (44) comprises an internal bore (46), and the hollow piston (44) is slidably mounted to guide rods (48, 50). Consequently, on rotation of the second drive shaft (28) and a crank plate (38), the eccentric motion of the crank pin (40) drives a crank arm (42), and due to the pivotal connection between the crank arm (42) and the underside of the hollow piston (44), the hollow piston is caused to reciprocate back and forth along guide rods (48, 50).
Description
Technical field
The present invention relates to a kind of hammer mechanism of electric tool, and the electric tool that is combined with this mechanism.The present invention especially but not exclusively relate to a kind of have hammering pattern, rotation mode and hammering, rotation the combine hammer mechanism that is used for hammer drill of pattern and the electric tool that is combined with this mechanism.
Background technology
Hammer drill belongs to electric tool, usually can be with a kind of operation the in three kinds of mode of operations.Usually, hammer drill has the cutter head that can operate with the pattern that hammering pattern, drill mode and hammering combine with drilling.
European patent application EP 0775556 has been described a kind of driving mechanism of this hammer drill.This mechanism comprises hollow piston, wherein has been mounted slidably plunger member.Hollow piston is slidably mounted on the pair of guide rods, and the rear portion of hollow piston is connected in the pendulum plate, thereby when starting the motor of hammer drill, hollow piston just can move back and forth along guide rod to and fro by the pendulum plate.The reciprocating motion of hollow piston causes plunger member to move with piston, and the air in the piston is compressed, this then cause plunger member on an end of cutter head, to apply impact, thereby form the hammer action of electric tool.Cutter head also is installed in the main shaft, and this main shaft is rotated by the motor of instrument under drill mode.
The defective of EP0775556 is, because hollow piston is driven by the pendulum plate that is installed on the hollow piston back and moves back and forth, be used for producing this reciprocating mechanism along relatively large on the reciprocating direction, be difficult in therefore that this side up and obtain the mechanism of compact.
DE19856638 discloses a kind of hammer drill, and wherein piston back and forth drives by the pendulum plate that is connected in piston one side, to apply impact to cutter head.Though this set can make it than being arranged on along compact more on the direction of reciprocating motion of the pistons of EP0775556, put plate and hinder the hammer drill compactness that becomes on transverse to reciprocating direction in the layout of piston one side.
Summary of the invention
The preferred embodiments of the present invention manage to overcome the above-mentioned shortcoming of prior art.
According to an aspect of the present invention, provide a kind of hammer mechanism of electric tool, this electric tool has shell and is arranged in the described shell and has and is used for the motor of output shaft of driven tool cutter head, and this hammer mechanism comprises:
A plurality of guide rods;
At least one hollow piston, this hollow piston are fit to be installed on a plurality of described guide rods and are adapted to pass through at least one actuator makes it move back and forth along described guide rod with described hollow piston one combining of side; And
At least one plunger member, this plunger member are slidably mounted in the described hollow piston and are suitable for because the reciprocating motion of described hollow piston and apply impact to the head of described instrument.
Be adapted to pass through at least one actuator and on described guide rod, carry out reciprocating hollow object by at least one is set with described hollow object one combining of side, described guide rod provides the advantage that can make this mechanism structure light firm, and the structure that described actuator and combining of described hollow object one side can make this mechanism is along compact more on the reciprocating direction.
In a preferred embodiment, at least one described hollow piston is slidably mounted on two guide rods with mutually substantially parallel longitudinal axis.
At least one described actuator can a bit locating in conjunction with at least one described hollow piston between described respective guide rod.
In a preferred embodiment, at least one described actuator at the downside of hollow piston in conjunction with at least one hollow piston.
By the guiding piece that can be incorporated into described hollow piston downside is set, can obtain to reduce the advantage of described hammer mechanism length and width.Consider from the ergonomics angle, preferably reduce the length and the width of instrument, rather than the height of instrument, more easily operation tool.
This mechanism can also comprise at least one crank element, is fit to be incorporated into a side of described hollow piston, and rotates to cause described hollow piston to move back and forth around axis.
Its advantage is to make the structure of this mechanism compacter more than the mechanism that is combined with one or more pendulum plates.
This mechanism can also comprise that at least one is suitable for the crank disc that is rotated by described output shaft, and the eccentric corresponding crank-pin that is installed at least one described crank disc and is pivotally connected to corresponding described crank element, thereby the rotation of described crank disc causes described hollow piston to move back and forth along a plurality of described guide rods.
This mechanism can also comprise the tumbler that tool insert is rotated by described motor.Described tumbler can comprise the power transmission shaft that extends transverse to described cutter head pivot center.Its advantage is to make the structure of the electric tool that is combined with this mechanism compact more.
According to a further aspect in the invention, provide a kind of electric tool, comprised shell, be arranged in the described shell and have and be used for the motor of output shaft of driven tool cutter head and aforesaid hammer mechanism.
In a preferred embodiment, this electric tool is a hammer drill.
Description of drawings
Only nonrestrictive mode is described in detail the preferred embodiments of the present invention with example referring now to accompanying drawing, in the drawings:
Fig. 1 is the side view that the part of enforcement hammer drill of the present invention is dissectd;
Fig. 2 is the perspective view of the hammer mechanism of hammer drill among Fig. 1;
Fig. 3 is the rearview of hammer drill among Fig. 1;
Fig. 4 is the sectional view of the hammer drill of Fig. 1 of being intercepted along Fig. 3 center line A-A;
Fig. 5 is the sectional view from the top view of hollow piston of the present invention and guide rod that is intercepted along Fig. 4 center line B-B; And
Fig. 6 is the decomposition vertical view of hammer drill among Fig. 1.
The specific embodiment
With reference to figure 1, as understood by those skilled in the art, shown in hammer drill 2 comprise the shell 4 that clam formula half shell made by two durability plastics is formed.What extend from shell 4 front ends is to be used for the chuck 6 or the similar device of clamping cutter head.Rechargeable battery group 8 is installed on outer casing bottom in separable mode, and can come to unload divided by charging again from shell 4 by depressing clasp 10.Shell 4 comprises handle portion 12, and it has the trigger 14 that is used for activating by setting motor 16 in the enclosure hammer drill.Output shaft 18 extends out from motor 16, and this output shaft 18 has moulding pinion 20 thereon.Pinion 20 has a plurality of gear teeth (not shown) that take shape on its outer surface.
With reference to figure 1,2 and 4, the pinion 20 of output shaft 18 is meshed with first gear 22 and second gear 24.Like this, when output shaft 18 was activated rotation, gear 22 and 24 also can rotate.First power transmission shaft 26 is fixed in gear 22 so that first power transmission shaft 26 and first gear 22 together rotate, and second power transmission shaft 28 is fixed in second gear 24 so that second power transmission shaft 28 and second gear 24 together rotate.
The operation of hammer drill 2 rotation modes is described referring now to Fig. 2 and 4.
When starting motor 16, power transmission shaft 18 rotates and causes pinion 20 to rotate.First power transmission shaft 26 that pinion 20 drives first gear 22 and supported by bearing 30.First bevel gear 32 be installed on first power transmission shaft 26 the upper end so that first bevel gear 32 together rotate with power transmission shaft 26.Second bevel gear 34 is installed on and is used for the main shaft 36 of receiving drill bit (not shown), and main shaft 36 is rotatably installed in the shell around axis 37.Bevel gear 32,34 is meshing with each other, thereby the rotation of first bevel gear 32 causes second bevel gear 34 to rotate around axis 37.This provides the drilling effect.
The hammering pattern of hammer drill 2 is described with reference to figure 2,4 and 5 again.
When by trigger switch 14 starter motors 16, the output shaft 18 of motor rotates together with pinion 20.Pinion 20 has the gear teeth (not shown) that is meshed with the gear teeth (not shown) of second gear 24.Second gear 24 that is installed on power transmission shaft 28 is rotated.Crank disc 38 with eccentric crank-pin 40 (Fig. 4) that is provided with is installed on the top of power transmission shaft 28.Crank arm 42 is pivotally connected to the downside of crank-pin 40 and hollow piston 44.Hollow piston 44 comprises interior thorax 46 (Fig. 5), and hollow piston 44 is slidably mounted on guide rod 48,50.Therefore, when the rotation of second power transmission shaft 28 and crank disc 38, the eccentric motion of crank-pin 40 drives crank arm 42, because pivotally connected between crank arm 42 and hollow piston 44 downsides causes hollow piston 44 to move back and forth to and fro along guide rod 48,50.
Plunger member 52 is mounted slidably in the interior thorax 46 of hollow piston 44, and O shape ring 53 (Fig. 5) are arranged between plunger member 52 and piston 44 inner surfaces.Plunger member 52 seals with hollow piston 44 inner formation, thereby when hollow piston 44 moved back and forth, plunger member 52 was vibrated with respect to piston 44 under the air spring effect.Plunger member comprises the front end 54 that feeds main shaft 36.When plunger member 52 vibrations, the front end 54 of plunger member 52 will clash into the rear portion of cutter head (not shown) so that the hammer action of hammer drill to be provided.
Mode altering mechanism (not shown) can allow the user go to select hammering pattern, rotation mode or hammering and rotate a kind of in the pattern that combines.For example, by gear 22 is broken away from the hammering pattern of selecting from pinion 20,, gear 24 selects rotation mode by being broken away from from pinion 20.When gear 22 and 24 all keeps engagement with pinion, selection be exactly the pattern that hammering combines with rotation.
By hollow piston 44 that is slidably mounted on guide rod 48,50 and the crank-pin 40 that engages hollow piston 44 downsides are provided, can make the structure of hammer drill compacter more than prior art to a great extent.
For a person skilled in the art, should be understood that the foregoing description only is, not deviate from the basis of the scope of the invention that limits as accessory claim without any limited as example, can carry out variations and modifications to the present invention.
Claims (10)
1. the hammer mechanism of an electric tool, this electric tool have shell and are arranged in the described shell and have and be used for the motor of output shaft of driven tool cutter head, and this hammer mechanism comprises:
A plurality of guide rods;
At least one hollow piston, this hollow piston are fit to be installed on a plurality of described guide rods and are fit to makes it move back and forth along described guide rod by at least one actuator with combining of described hollow piston one side; And
At least one plunger member, this plunger member are slidably mounted in the described hollow piston and are suitable for applying impact owing to the reciprocating motion of described hollow piston to described tool insert.
2. mechanism as claimed in claim 1, at least one described hollow piston is slidably mounted on two guide rods with mutually substantially parallel longitudinal axis.
3. mechanism as claimed in claim 2, some place of at least one described actuator between described respective guide rod is in conjunction with at least one described hollow piston.
4. mechanism as claimed in claim 2, at least one described actuator at the downside of hollow piston in conjunction with at least one hollow piston.
5. mechanism as claimed in claim 1 also comprises at least one crank element, is fit to be incorporated into a side of described hollow piston, and rotates to cause described hollow piston to move back and forth around axis.
6. mechanism as claimed in claim 5, comprise that also at least one is suitable for the crank disc that is rotated by described output shaft, and the eccentric corresponding crank-pin that is installed at least one described crank disc and is pivotally connected to corresponding described crank element, thereby the rotation of described crank disc causes described hollow piston to move back and forth along a plurality of described guide rods.
7. mechanism as claimed in claim 1 also comprises the tumbler by described motor turning tool cutter head.
8. mechanism as claimed in claim 7 is characterized in that, described tumbler can comprise the power transmission shaft that extends transverse to the cutter head pivot center.
9. an electric tool comprises shell, be arranged in the described shell and have to be used for the motor of output shaft of driven tool cutter head, and as above claim in any one described hammer mechanism.
10. electric tool as claimed in claim 10 is characterized in that, this electric tool is a hammer drill.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0428215.8A GB0428215D0 (en) | 2004-12-23 | 2004-12-23 | Piston Drive Mechanism |
| GB0428215.8 | 2004-12-23 | ||
| GB0516506.3 | 2005-08-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1792561A true CN1792561A (en) | 2006-06-28 |
Family
ID=34113152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510135807.7A Pending CN1792561A (en) | 2004-12-23 | 2005-12-23 | Hammer mechanism for a power tool |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1792561A (en) |
| GB (2) | GB0428215D0 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106335031A (en) * | 2015-07-15 | 2017-01-18 | 苏州宝时得电动工具有限公司 | Electric hammer |
| CN108430712A (en) * | 2015-12-22 | 2018-08-21 | 罗伯特·博世有限公司 | Hand tool and method for manufacturing hand tool |
| CN109590950A (en) * | 2017-09-30 | 2019-04-09 | 苏州宝时得电动工具有限公司 | Fullering tool |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9524180D0 (en) * | 1995-11-27 | 1996-01-31 | Black & Decker Inc | Hammer mechanism |
| DE10103141A1 (en) * | 2001-01-24 | 2002-07-25 | Hilti Ag | Electrical hand tool appliance e.g. hammer drill, has pneumatic striking tool and valve openings sealed off to vent pneumatic spring through riveting header |
| DE10260710A1 (en) * | 2002-12-23 | 2004-07-01 | Robert Bosch Gmbh | Hammer or percussion hammer |
-
2004
- 2004-12-23 GB GBGB0428215.8A patent/GB0428215D0/en not_active Ceased
-
2005
- 2005-08-11 GB GB0516506A patent/GB2421465A/en not_active Withdrawn
- 2005-12-23 CN CN200510135807.7A patent/CN1792561A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106335031A (en) * | 2015-07-15 | 2017-01-18 | 苏州宝时得电动工具有限公司 | Electric hammer |
| CN108430712A (en) * | 2015-12-22 | 2018-08-21 | 罗伯特·博世有限公司 | Hand tool and method for manufacturing hand tool |
| CN109590950A (en) * | 2017-09-30 | 2019-04-09 | 苏州宝时得电动工具有限公司 | Fullering tool |
| CN109590950B (en) * | 2017-09-30 | 2022-07-12 | 苏州宝时得电动工具有限公司 | Hammering tool |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2421465A (en) | 2006-06-28 |
| GB0516506D0 (en) | 2005-09-14 |
| GB0428215D0 (en) | 2005-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1674206A1 (en) | Hammer mechanism for power tool | |
| CN1572433A (en) | Rotary hammer | |
| CN101898352B (en) | Vibration reduction apparatus for power tool and power tool incorporating such apparatus | |
| CN1290656C (en) | Reciprocating-type saw | |
| CN1807026A (en) | Power tool | |
| EP2138278B1 (en) | Handle for a power tool | |
| EP1150036A2 (en) | Adjustable stroke mechanism for a scotch yoke assembly | |
| CN1699027A (en) | Mode selection mechanism for power tool, and power tool incorporating such mechanism | |
| CN1699002A (en) | Output shaft assembly for power tool and power tool incorporating such assembly | |
| RU2455144C2 (en) | Hand-held electrical machine for rotary-percussion drilling or slotting | |
| CN1613614A (en) | Vibration reduction apparatus for a power tool and power tool therewith | |
| CN101088710B (en) | Vibration reduction apparatus for power tool and power tool incorporating such apparatus | |
| WO2007105742A1 (en) | Electrically-driven power tool | |
| US7157833B2 (en) | Tool using a piezo actuator | |
| EP1232817A3 (en) | Reciprocating power tools | |
| CN1792561A (en) | Hammer mechanism for a power tool | |
| CN1899772A (en) | Multifunctional electric hammer | |
| CN2661382Y (en) | Hammer anvil | |
| CN2917974Y (en) | Multifunctional electric hammer | |
| CN1108901C (en) | Electric saw | |
| CN112643614A (en) | Hand-held multifunctional electric hammer | |
| CN220548233U (en) | Light electric hammer of permanent magnet brushless motor | |
| CN217620419U (en) | Electric hammer | |
| CN217123075U (en) | Impact tool | |
| CN2606661Y (en) | Function changeover device for electric tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |