CN104209586B - Electric tool - Google Patents
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- CN104209586B CN104209586B CN201310207767.7A CN201310207767A CN104209586B CN 104209586 B CN104209586 B CN 104209586B CN 201310207767 A CN201310207767 A CN 201310207767A CN 104209586 B CN104209586 B CN 104209586B
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Abstract
The invention provides a kind of reciprocator for electric tool, it includes：Rotating wheel, the rotating wheel have the first central axis；The first eccentric part being arranged in above-mentioned rotating wheel, first eccentric part are revolved round the sun and the output link of driving as rotating wheel is from transferring to be revolved round the sun for rotation centerline around the first central axis by above-mentioned first eccentric part；And first balance weight, first balance weight is arranged in rotating wheel, the center of gravity of first balance weight and above-mentioned first eccentric part respectively positioned at the both sides of the first central axis of rotating wheel, first balance weight with rotating wheel rotate caused by the first component energy balance rotating wheel of centrifugal force in a first direction reaction force of first eccentric part when driving the output link of electric tool to move in a first direction；The reciprocator also includes the second balance weight, and second component of the centrifugal force of above-mentioned first balance weight in the second direction perpendicular with first direction can be balanced when the second balance weight is by rotation wheel drive.
Description
Technical field
The application is related to field of power tools, more particularly to the electric tool for moving back and forth function.
Background technology
Common electric tool, such as electric hammer, reciprocating saw etc., all include being used to convert rotational motion into linear movement
Movement conversion mechanism.
The output link of the electric tool of the above-mentioned type, which performs, to be moved back and forth and carries out reciprocating impact or past to target workpiece
Operation, the parts to be moved back and forth positioned at tool interior such as multiple cutting can produce reaction force.This reaction force causes work
Tool vibration, and the vibration of instrument is delivered to operating personnel on hand, makes operating personnel uncomfortable or hurts operating personnel,
Make the service life of electric tool reduce.
In order that electric tool obtains preferable operating characteristics, while reduce caused vibration, technology people in the art
Member has done many effort.
Such as a kind of reciprocating-type saw is described in United States Patent (USP) No.USRE35258E, its movement conversion mechanism includes the
One cam pin, the center of first cam pin biases a distance from the rotation axis of gear, for driving axostylus axostyle by intermediate mass
Do linear reciprocating motion；The eccentric off-centre operation portion in the side (into 180 degree) opposite with cam pin from the rotation axis direction of gear.
When gear is rotated, the output link of saw is that axostylus axostyle and balance component are driven and opposite by cam pin and off-centre operation portion respectively
Direction on linear reciprocating motion, so play balance and reduce vibration purpose.
United States Patent (USP) No.US7996996B2 discloses a kind of reciprocating-type saw.The drive device (cam pin) of the axostylus axostyle of saw with
The drive part of balance component leaves so that the quality of balance component can reduce, and so saw more compact structure itself is lighter.
Similar movement transmission structure is also applied to electric hammer, such as the electricity disclosed in United States Patent (USP) No.US6907943B2
Hammer.
The content of the invention
It is an object of the invention to provide the side of the vibration of another electric tool for reducing outputting reciprocating linear movement
Method, or at least user provides a kind of selection.
Therefore, the invention provides a kind of reciprocator for electric tool, it includes：By the power source of electric tool
Driving and the rotating wheel of rotation, the rotating wheel have the first central axis, rotating wheel is using the first central axis as pivot
Line and rotation；The first eccentric part being arranged in above-mentioned rotating wheel, first eccentric part is as rotating wheel is from then around the
One central axis is that rotation centerline is revolved round the sun, and is revolved round the sun and driven by above-mentioned first eccentric part, is carried out in the first direction reciprocal
The output link of the electric tool of motion；And first balance weight, first balance weight are arranged in rotating wheel, the first balance
The center of gravity of block is located at the both sides of the first central axis of rotating wheel with above-mentioned first eccentric part respectively, and first balance weight is with rotation
The first eccentric part of the first component energy balance rotating wheel of centrifugal force in a first direction is in driving electricity caused by runner rotation
Reaction force during the output link motion of power driven tools in a first direction；The reciprocator also includes by rotation wheel drive
Second balance weight, can be balanced when the second balance weight is by rotation wheel drive the centrifugal force of above-mentioned first balance weight with first direction phase
The second component in vertical second direction.
According to a preferred embodiment, the second eccentric part is provided with above-mentioned rotating wheel, the second eccentric part is with rotation
Wheel is that pivot is revolved round the sun from then around the first central axis, to drive the second balance weight to move back and forth.
According to a preferred embodiment, second balance weight is moved back and forth by first eccentric part driving.
According to a preferred embodiment, above-mentioned second balance weight drives reciprocal fortune in a second direction by the second eccentric part
Dynamic, the second balance weight moves back and forth in a second direction can balance the to the reaction force caused by the second eccentric part in a second direction
Second component of the centrifugal force of one balance weight in second direction.
According to a preferred embodiment, above-mentioned second balance weight is provided with elongated hole, and above-mentioned second eccentric part is contained in elongated hole
It is interior and drive the second balance weight move back and forth in a second direction, the second balance weight both sides pair centered on the extending direction of elongated hole
Claim.
According to a preferred embodiment, the extending direction of the elongated hole of above-mentioned second balance weight is identical with first direction, the
When two eccentric parts are rotated and revolved round the sun with rotating wheel, slided in a first direction relative to the extending direction of elongated hole along elongated hole.
According to a preferred embodiment, the extending direction of the elongated hole of above-mentioned second balance weight and the angle of first direction are small
In equal to 60 degree, when the second eccentric part is rotated and revolved round the sun with rotating wheel, slided on the extending direction of elongated hole relative to elongated hole
According to a preferred embodiment, guiding second is provided between above-mentioned second balance weight and power tool body
Guiding mechanism of the balance weight along the linear motion perpendicular to elongated hole bearing of trend.
Set according to a preferred embodiment, on the second eccentric part and offer a hole, above-mentioned first eccentric part is one end
The pin being contained in the hole on above-mentioned second eccentric part, pin have the second central axis.
According to a preferred embodiment, the second eccentric part is a cylinder, and cylinder has the 3rd central axis, above-mentioned
First central axis, the second central axis and the 3rd central axis are parallel to each other.
According to a preferred embodiment, above-mentioned first balance weight is the fan-shaped weight block for being arranged at rotating wheel side.
According to a preferred embodiment, above-mentioned second balance weight is by the first eccentric part powered motion.
In this way, the moving component in electric tool includes inertia force and centrifugal force etc. substantially caused by motion process
All power has all reached balance, so vibration is minimized caused by electric tool, avoids electric tool because caused
Vibrate and cause internal part to destroy, both extended the service life of electric tool, allow the operator to cosily enter again
Row operation.
Brief description of the drawings
May be better understood from the preferred embodiment of the application described below in conjunction with the accompanying drawings the above-mentioned of the application and
Further feature and advantage, wherein：
Fig. 1 be according to the present invention reciprocating-type saw stereogram, wherein, the parts thereof of shell etc. is removed
；
Fig. 2 is the longitudinal sectional drawing of Fig. 1 reciprocating-type saw；
Fig. 3 be according to the stereogram of the electric hammer of the present invention, wherein, the parts thereof of shell etc. is removed；
Fig. 4 is Fig. 3 front view；And
Fig. 5 is Fig. 3 top view.
Embodiment
Herein, term " electric tool " is include but not limited to, reciprocating type electric saw and electric hammer.Moreover, with above-mentioned
The other types of portable power tool of feature is also contained in the scope of the present invention.
Electric tool includes the drive component of output rotary motion, performs reciprocating output precision and self-powered in future
The rotary motion of dynamic component is converted to the reciprocating movement conversion mechanism of output precision.Output precision is carried out reciprocal by driving
During motion, because the change of the direction of motion can be produced during reciprocal, the active force and anti-as caused by the change of the direction of motion
The change of active force, electric tool can be made to produce vibration, this can reduce the service life of electric tool, also be brought to operating personnel
Physiologically fatigue damage, while also influence the comfortableness that operating personnel operate electric tool.
The purpose of the present invention is the output precision for reducing electric tool in the caused vibration that moves back and forth, this mesh
Be achieved by the novel movement conversion mechanism of the invention of basis.
Describe the movement conversion mechanism according to the present invention in detail by taking reciprocating-type saw and electric hammer as an example below.
Fig. 1 shows the stereogram of a part for the reciprocating-type saw according to the present invention.Reciprocating-type saw bag in the present embodiment
Include drive component, motion transition components 6 and output precision.Move transition components 6 is by the convert rotational motion of drive component
The reciprocating motion of output precision, with this, enable to be assembled in the saw blade on output precision and move back and forth, so as to reach reciprocal evidence
Reciprocating cutting function.
As depicted in figs. 1 and 2, drive component includes motor (not shown) and the drive shaft 2 by motor-driven rotation.Motion
Transition components 6 include gear 12, cam pin 14, balance component 18 and weighted 50.
The gear 12 of motion transition components is installed in electric tool by rotary shaft 16, between gear 12 and rotary shaft 16
With bearing, gear 12 is set to be rotated relative to the body of electric tool.Gear 12 driven by the drive shaft 2 of above-mentioned drive component and
Rotate, the central axis of gear 12 and the central axis upright of drive shaft 2, being respectively equipped with gear 12 and drive shaft 2 can be mutually
The cone tooth of engagement, drive shaft 2 are rotated by the cone tooth drive gear 12 of engagement around its center axis.
Gear 12 includes body 30, and body 30 includes the upper surface 32 formed with cone tooth, and with the phase of upper surface 32
Anti- lower surface 34.There are rounded protrusions 40, rounded protrusions 40 from the projection vertically upward of upper surface 32 of the body 30 of gear 12
The distance that is set from the center axis deviation one of gear 12 of central axis.Pin press-fit holes 24 are provided with rounded protrusions 40, partially
The lower end of heart pin 14 is press fit into pin press-fit holes 24, is rotated with the rotation of gear 12.The central axis of cam pin 14
The distance of a setting is also offset from the central axis of gear 12.It is circular when gear 12 is rotated by driving around its center axis
Teat 40 and cam pin 14 revolve round the sun around rotary shaft 16.
Output precision include move back and forth mandrel 4, be assembled in mandrel 4 one end saw blade clamping part 3 and by
The saw blade (not shown) that saw blade clamping part 3 clamps.Set on mandrel 4 by U-shaped guide member 20, the extending direction of guide member 20 with
Longitudinal extending direction of mandrel 4 is perpendicular.The other end of above-mentioned cam pin 14 is contained in the U-shaped guide member 20 of above-mentioned mandrel 4,
In cam pin 14 as gear 12 rotates, during around the revolution of the central axis of gear 12, cam pin 14 is driven by guide member 20
Mandrel 4 moves back and forth its Longitudinal extending direction D1.Wherein, the end being contained in guide member 20 of cam pin 14 is also set
An intermediate mass 28 is equipped with, usually needle bearing, intermediate mass 28 is located in the U-shape structure of guide member 20.In cam pin 14 in
When mandrel line revolves round the sun, cam pin 14 can be moved to drive mandrel 4 to move back and forth in the direction di in guide member 20 relative to it, in
Between block 28 help its slip it is smooth.With this, the saw blade for enabling to be assembled on mandrel 4 moves back and forth in the direction di, reaches sawing
Function.This driving structure is prior art, be will not be described in detail herein.
When mandrel 4, which is driven in, to be moved back and forth on the D1 of direction, the athletic meeting that it changes in the direction di is to bias
Pin 14 produces reaction force.This reaction force is transferred to gear 12 by cam pin 14, and now, gear 12 is not in the direction di by
The power of balance, the power of this unbalanced power will make electrician tool produce vibration.To reduce this vibration, electric tool of the invention
Motion transition components 6 are provided with weighted 50 and balance component 18.
In the application, weighted 50 is set positioned at the lower section of gear 12, from the lower surface of the body 30 of gear 12
34 downward projections, it can be rotated together with gear 12.Weighted 50 substantially in sector, has center of gravity.Weighted 50 can be with
It is and the one of gear 12 or is assembled on gear 12.Weighted 50 is located at gear 12 with rounded protrusions 40
The two opposite sides of central axis, especially the central axis of the center of gravity of weighted 50 and rounded protrusions 40 be located in gear 12
The two opposite sides of mandrel line.
When gear 12 is around its center axis rotation, weighted 50 with gear 12 around the center axis thereof, by
This can produce centrifugal force F.According to mechanics principle, this centrifugal force can be broken down into along direction D1 the first component F1 and and direction
Second component F2s of the D1 to vertical direction D2.The size and weight of weighted 50 are configured to the first component on the D1 of direction
F1 can balance mandrel 4 in the direction di to the reaction force of gear 12.With this, eliminate gear 12 has not in the direction di
Equilibrant force.But the second component F2 on above-mentioned direction D2 can also make electric tool produce vibration, and operator is brought not
Profit influences.In order to eliminate the unbalanced power of this second component F2, the present invention is provided with a balance component 18 in motion transition components 6.
As shown in figure 1, balance component 18 is a symmetrical weight block, an elongated hole is provided with line of symmetry in the middle
36, according to the operation environment of reality, balance component 18 can be left-right asymmetry structure.In the present embodiment, balance component 18
With rectangle and semicircular combined shaped, other symmetrical structures can also.The lobe of said gear 12 is received
It is dissolved in the elongated hole 36 of above-mentioned balance component 18.Balance component 18 is configured to the bearing of trend and direction D1 phases of its elongated hole 36
Together, i.e., with direction D2 to vertical.
It is provided with the upper surface 19 of balance component 18 and is guided by guide rail section 42, (can not be schemed along the direction D2 components slided
Show).Guide rail section 42 and the body of electric tool are relatively fixed, and are offered and are extended the guide channel 46 to be formed along direction D2, by upper
Guide channel is stated, balance component 18 is slided in the direction d 2.In the prior art, guiding can be realized and make it along a predetermined party
To the structure of slip, can be used in this technology.
When rounded protrusions 40 with gear 12 from then when revolving round the sun around its center axis, in the direction di, rounded protrusions 40
Moved in the elongated hole 36 of balance component 18, without driving balance component 18 to move in the direction di.In the direction d 2, it is circular
Teat 40 drives balance component 18 to reciprocatingly slide.So.Under the guiding of above-mentioned lead segment 42, the driving balance structure of rounded protrusions 40
Part 18 slides in direction D2 linear reciprocations.
When reciprocating linear slides balance component 18 in the direction d 2, the movement locus of its slip in the direction d 2 can produce
It is raw to change, reaction force acts thus can be produced on rounded protrusions 40.And it will be produced by rounded protrusions 40 by balance component 18
Reaction force be transferred to gear 12, it is possible thereby to eliminate caused second point in the direction d 2 of the centrifugal force by weighted 50
Power F2.
By said structure, equilibrium-like is in reciprocating saw overall perpendicular direction D1 and direction D2 power
State, it can be seen from mechanics principle, after perpendicular direction D1 and direction D2 power is balanced, also eliminate the need for causing back and forth according to production
The unbalanced power of raw vibration.
The size of above-mentioned balance component 18 caused reaction force in the direction d 2, can be according to the weight of balance component 18
Amount, the position adjustment of the central axis of the opposed gear 12 of lobe 40.With this, pass through weighted 50 and balance component 18
Effect, can eliminate or greatly reduce reciprocating saw cutting when coping saw blade reciprocating motion and caused vibration.With this, disappear
The caused detrimental effect except the vibration due to reciprocating saw.
Wherein, the elongated hole 36 of above-mentioned balance component 18 can be configured to the position for having certain angle with direction D1, and
And balance component 18 is arranged to slide along the direction D3 linear reciprocations perpendicular to elongated hole 36 by corresponding lead segment 42.
When rounded protrusions 40 drive balance component 18 to be slided along direction D3 linear reciprocations, balance component 18 will be on the D3 of direction to circle
Teat 40 produces reaction force, and reaction force is produced to gear 12 with this.According to the force resolution principle of mechanics, by balance component
18 the second component on the first component and direction D2 that direction D3 reaction force can also be broken down on the D1 of direction.Thus
Understand, even if the direction of motion of balance component 18 on the D3 of direction, can also produce power in the direction d 2, and this is direction D2's
Power can also be used to the second component F2 of the centrifugal force of balance breeding component 50 in the direction d 2.And by balance component 18 in D1
Component caused by direction can caused first component F1 be balanced in the direction di by weighted 50.Through overtesting, the application
The extending direction of elongated hole 36 of balance component 18 can be configured to form a position less than or equal to 60 degree of angle with direction D1
Put.The extending direction of the elongated hole 36 of the balance component 18 preferably disclosed in above-described embodiment is configured to and direction D1 identicals
Position, i.e., angle between the two is zero degree.
In summary, the circle of all moving components caused power in operating process is sawed, configuration and design gear 12 is considered
Between the geometric parameter of shape teat 40 and cam pin 14, including the position of respective central axis, associated central axis
Deviation angle or deviation distance, configuration and design balance component 18 and the geometric parameter of weighted 50, including respective shape,
Quality or position of centre of gravity etc. so that caused vibration farthest reduces electric tool in use, while electric tool knot
Structure is simpler, is readily produced.
It shown below is variation mode that may be present：
In the present embodiment, the central axis of the central axis of rounded protrusions 40 and cam pin 14 is misaligned.In other realities
Apply in example, the central axis of rounded protrusions can overlap with the central axis of cam pin, and after overlapping, rounded protrusions 40 with
Cam pin 14 can be a part.
In the present embodiment, the body 30 of rounded protrusions 40 and gear 12 is integrally formed.In other embodiments, circle
Shape teat 40 can be formed separately and be fixed thereon with the body 30 of gear 12, such as be connected through a screw thread or weld etc. this
Known mode in field.
Alternatively, pin press-fit holes 24 can not penetrate the body 30 of gear 12, or, cam pin 14 can otherwise be consolidated
Surely the body 30 of rounded protrusions 40 or gear 12, such as the mode such as above mentioned threaded connection or welding are connected to.Partially
It is also possible that heart pin 14, which is integrally formed on the rounded protrusions 40 or body 30 of gear 12,.
In the present embodiment, weighted 50 is the part being integrally formed with the body of gear 12 30.Certainly, as before
State, weighted 50 can also be affixed to the separable part on body 30.
Another electric tool-electric hammer according to the present invention is described below.
Shown in Fig. 4-5, electric hammer includes the drive shaft 102 of the part as drive component, and it is by battery or external electricity
The motor of source power supply drives and exports rotary motion.
The movement conversion mechanism 106 of electric hammer includes the gear 112 rotated, gear are engaged and be driven with drive shaft 102
112 by driving rotate when, as the gear 12 of above-mentioned reciprocating saw around its own central axis (not shown) rotation.
Unlike the embodiment of reciprocating-type saw, the gear 112 of electric hammer is parallel with the central axis of drive shaft 102
, both are engaged by common straight-tooth to drive.
Identical with reciprocating saw, the movement conversion mechanism 106 of electric hammer is also stretched upwards including one from the upper surface 121 of gear 112
Go out rounded protrusions 140.The distance that the central axis of rounded protrusions 140 is set from the center axis deviation one of gear 112.
The output precision of electric hammer includes connecting plate 9, piston 13 and impulse member 15.
Cam pin 114 stretches out upwards from rounded protrusions 140, the central axis of the central axis of cam pin 114 from gear 112
Deviate the distance of a setting, form hubbing structure with one end of connecting plate 9, with this, form cam hubbing structure, connecting plate 9
The other end is connected with the hinge of piston 13.When gear 112 is rotated by driving, cam pin 114 rotates with gear 112, passes through connection
Plate 9, the piston 13 of electric hammer is driven to move back and forth.Piston 13 is assembled into cylinder (non-label), by piston 13 in cylinder
Straight reciprocating motion, air in the gap 17 between compression piston 13 and impulse member 15, impulse member 15 bears air pressure and dashes forward
The power of critical setting is broken, impulse member 15 can at a high speed eject forward, promote after the tool heads of its front end are impacted to workpiece, reach
Into the effect of the impact of electric hammer.
Above-mentioned piston 13 can be passed through connecting plate in the direction di during driving linear reciprocating motion as above-mentioned reciprocating saw
9 pairs of cam pins 114 produce reaction forces, and cam pin 114 can by this it is counter be transferred to gear 112 as power, make gear 112 in direction
D1 is upper by unbalanced power, and electric hammer is produced vibration.
Such as the description of above-mentioned reciprocating saw, the application on gear 112 by setting and the similar counterweight of above-mentioned reciprocating saw
Component 150, and rotated with gear 112 by it and the first component of caused centrifugal force in the direction di come balance gear in direction
Above-mentioned unbalanced power on D1, makes the dynamic balance of gear 112 in the direction di.
Identical with the situation of above-mentioned reciprocating saw, weighted 150 also has it on the direction D2 perpendicular with direction D1
Second component of centrifugal force, to eliminate this second component.The application is set such as similar symmetrical flat of above-mentioned reciprocating saw
Weighing apparatus component 118 carrys out the second component of counterweight component 150 in the direction d 2.The extension side of the elongated hole 136 of this balance component 118
To the angle that can also be arranged to be less than or equal to direction D1 60, extending direction and side of its optimal embodiment for elongated hole 136
Identical to D1, i.e., angle between the two is zero degree.
As described above, in operation, the overall power in direction D1 and direction D2 of electric hammer substantially achieves balance, so as to most
Reduce issuable vibration to big degree.
As described above, it may be said that produced according to the output precision of the electric tool of the present invention during linear reciprocating motion
Component balance of the inertia force by the centrifugal force of weighted in the direction, the centrifugal force of weighted is along being perpendicularly to the direction
Force component on direction reaches balance by the inertia force of another eccentric component.Worked it is achieved thereby that reducing electric tool
During caused vibration this purpose.
Above for the present invention multiple embodiments be described, but the present invention be not intended to be limited to be described above and
The embodiment of accompanying drawing signal.Feature on one embodiment description is equally applicable to other embodiments of the invention, different real
New embodiment can be bound to each other to form by applying the feature of example.Without departing from the spirit and scope being defined by the below claims
In the case of, those skilled in the art can carry out various modifications and variation to above-described embodiment.
Claims (13)
1. a kind of reciprocator for electric tool, it includes：
The rotating wheel of rotation by the power source drive of electric tool, the rotating wheel have the first central axis, rotating wheel with
The rotation for rotation centerline of first central axis；
The first eccentric part being arranged in above-mentioned rotating wheel, first eccentric part is with rotating wheel from transferring around the first center
Axis is that rotation centerline is revolved round the sun,
Revolved round the sun and driven, the output link of the electric tool to move back and forth in the first direction by above-mentioned first eccentric part；With
And
First balance weight, first balance weight are arranged in rotating wheel, the center of gravity of the first balance weight and above-mentioned first eccentric part
Respectively positioned at rotating wheel the first central axis both sides, first balance weight with rotating wheel rotate caused by centrifugal force exist
First eccentric part of the first component energy balance rotating wheel on first direction drive electric tool output link motion when
Reaction force on first direction；
Characterized in that, the reciprocator also includes by the second balance weight of rotation wheel drive, the second balance weight is by rotating wheel
Second component of the centrifugal force of above-mentioned first balance weight in the second direction perpendicular with first direction can be balanced during driving.
2. reciprocator according to claim 1, wherein, the second eccentric part is provided with above-mentioned rotating wheel, second is eccentric
Portion is as rotating wheel is from transferring to be revolved round the sun for pivot around the first central axis, to drive the progress of the second balance weight reciprocal
Motion.
3. reciprocator according to claim 1, wherein, second balance weight is driven by first eccentric part and carried out
Move back and forth.
4. reciprocator according to claim 2, wherein, above-mentioned second balance weight is by the second eccentric part drives edge second party
To reciprocating motion, the second balance weight moves back and forth to the reaction force caused by the second eccentric part in a second direction in a second direction
Second component of the centrifugal force in second direction of the first balance weight can be balanced.
5. reciprocator according to claim 4, wherein, above-mentioned second balance weight is provided with elongated hole, above-mentioned second eccentric part
It is contained in elongated hole and drives the second balance weight to move back and forth in a second direction, the second balance weight is using the extending direction of elongated hole in
Heart both sides are symmetrical.
6. reciprocator according to claim 5, wherein, the extending direction and first party of the elongated hole of above-mentioned second balance weight
To identical, the second eccentric part is slided relative to the extending direction of elongated hole along elongated hole in a first direction when rotating and revolving round the sun with rotating wheel
It is dynamic.
7. reciprocator according to claim 5, wherein, the extending direction and first party of the elongated hole of above-mentioned second balance weight
To angle be less than or equal to 60 degree, the second eccentric part is with rotating wheel rotation and relative to length on the extending direction of elongated hole when revolving round the sun
Slide in hole.
8. according to the reciprocator described in claim 5 or 6, wherein, between above-mentioned second balance weight and power tool body
It is provided with the guiding mechanism for being oriented to the second balance weight along the linear motion perpendicular to elongated hole bearing of trend.
9. reciprocator according to claim 2, wherein, a hole, above-mentioned first eccentric part are offered on the second eccentric part
The pin being contained in for one end in the hole on above-mentioned second eccentric part, pin have the second central axis.
10. reciprocator according to claim 9, wherein, the second eccentric part is a cylinder, and cylinder has in the 3rd
Mandrel line, above-mentioned first central axis, the second central axis and the 3rd central axis are parallel to each other.
11. reciprocator according to claim 1, wherein, above-mentioned first balance weight is the fan for being arranged at rotating wheel side
Shape weight block.
12. according to the reciprocator any one of claim 4-7, wherein, above-mentioned second balance weight is by the first eccentric part
Powered motion.
13. reciprocator according to claim 8, wherein, above-mentioned second balance weight is by the first eccentric part powered motion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310207767.7A CN104209586B (en) | 2013-05-29 | 2013-05-29 | Electric tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310207767.7A CN104209586B (en) | 2013-05-29 | 2013-05-29 | Electric tool |
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| CN104209586A CN104209586A (en) | 2014-12-17 |
| CN104209586B true CN104209586B (en) | 2018-02-02 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108702964B (en) * | 2018-04-09 | 2021-02-19 | 浙江明磊锂能源科技股份有限公司 | Reciprocating saw |
| US11453093B2 (en) | 2019-06-24 | 2022-09-27 | Black & Decker Inc. | Reciprocating tool having planetary gear assembly and counterweighting assembly |
| CN112400450A (en) * | 2020-11-20 | 2021-02-26 | 苏州夏菲机械科技有限公司 | Cutterhead dynamic balance adjusting device for mowing |
| US11958121B2 (en) | 2022-03-04 | 2024-04-16 | Black & Decker Inc. | Reciprocating tool having orbit function |
| US11839964B2 (en) | 2022-03-09 | 2023-12-12 | Black & Decker Inc. | Counterbalancing mechanism and power tool having same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07266258A (en) * | 1994-03-25 | 1995-10-17 | Hitachi Koki Co Ltd | Tool holding device of electric hammer |
| GB2399615B (en) * | 2003-03-21 | 2006-03-15 | Black & Decker Inc | Vibration reduction apparatus for power tool and power tool incorporating such apparatus |
| JP4405195B2 (en) * | 2003-08-01 | 2010-01-27 | 株式会社マキタ | Reciprocating power tool |
| CN1330448C (en) * | 2004-02-25 | 2007-08-08 | 苏州宝时得电动工具有限公司 | Reciprocating rod balancing mechanism of reciprocating type electric power tool |
| JP5015697B2 (en) * | 2007-08-30 | 2012-08-29 | 株式会社マキタ | Impact tool |
| JP5474642B2 (en) * | 2010-04-12 | 2014-04-16 | 株式会社マキタ | Reciprocating cutting tool |
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