CN104416225A - Reciprocating saw - Google Patents
Reciprocating saw Download PDFInfo
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- CN104416225A CN104416225A CN201310400886.4A CN201310400886A CN104416225A CN 104416225 A CN104416225 A CN 104416225A CN 201310400886 A CN201310400886 A CN 201310400886A CN 104416225 A CN104416225 A CN 104416225A
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- balance weight
- main shaft
- elongated slot
- saw blade
- reciprocating
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- 230000000694 effects Effects 0.000 abstract description 5
- 230000001629 suppression Effects 0.000 description 5
- 238000013016 damping Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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Abstract
The invention relates to a reciprocating saw, which comprises a saw blade reciprocating motion driving mechanism, wherein the saw blade reciprocating motion driving mechanism comprises a main shaft, an electric motor and a balance weight assembly, a saw blade can be arranged on the main shaft, the electric motor provides power for the saw blade reciprocating motion driving mechanism, the balance weight assembly is used for reducing the vibration of the saw blade, and comprises a pivotable balance weight connecting part and a balance weight, the balance weight is connected onto the balance weight connecting part and can move in a direction opposite to the moving direction of the main shaft, the balance weight connecting part comprises a fan-shaped gear and a connecting arm formed into a whole together with the fan-shaped gear, the balance weight assembly also comprises a rack engaged with the fan-shaped gear, when the main shaft does reciprocating motion, through the engagement between the fan-shaped gear and the rack, the connecting arm drives the balance weight to move in a direction opposite to the moving direction of the main shaft. According to the reciprocating saw, a better vibration reduction effect can be obtained even when a light-weight balance weight is adopted, in addition, the weight of the whole reciprocating saw is reduced, the size is reduced, and in addition, the structure is compact.
Description
Technical field
The present invention relates to electric saw, particularly relate to a kind of reciprocating motion electric saw.
Background technology
The electric saw of saw blade reciprocating motion is also referred to as reciprocating saw.In the reciprocating saw course of work, saw blade is constantly accelerated and slows down to perform reciprocating motion, and this inevitably causes reciprocating saw to produce larger vibration.This vibration not only increases noise, and makes operating personnel uncomfortable.For this reason, reciprocating saw is being modified to the vibration reducing complete machine always.
GB2446688A discloses a kind of reciprocating saw, and it comprises the balance weight assembly with balance weight guiding rocking arm and balance weight structure.Balance weight guiding rocking arm is connected on housing by top pivot section, and is connected in balance weight structure by bottom pivot section.Balance weight structure is also connected on plunger actuation rocking arm by pivot section.In running, balance weight assembly is by reducing to vibrate with the counter motion of saw blade.But, because this balance weight modular construction is complicated and its reciprocating motion is not linear movement, thus need to occupy larger space, cause the structure of whole reciprocating saw not compact.
JP2001353619A discloses a kind of reciprocating saw, and it comprises the driven unit that the spindle reciprocating motion of saw blade is equipped with in driving and the balance weight be connected with driven unit by rocker arm.In running, driven unit simultaneously drive shaft and balance weight moves in the opposite direction to reduce vibration.But, because the rocker arm that is connected with balance weight is directly connected with drive link and in the middle around the pivot be fixed on housing, the stroke of balance weight is restricted, thus make the effect of vibration damping also be restricted.In order to obtain better effectiveness in vibration suppression, just must adopt the balance weight of larger quality, this causes, and the weight of whole reciprocating saw increases, volume increases and structure is not compact.
Thus, need to improve existing reciprocating saw.
Summary of the invention
Object of the present invention will overcome above-mentioned at least one defect of the prior art exactly, a kind of reciprocating saw is proposed, even if the effectiveness in vibration suppression that this reciprocating saw also can realize when adopting the balance weight of lighter weight, thus make the weight saving of whole reciprocating saw, volume reduces and compact conformation.
For this reason, according to an aspect of the present invention, a kind of reciprocating saw is provided, comprises:
Saw blade reciprocating motion driving mechanism, described saw blade reciprocating motion driving mechanism comprises saw blade can be installed to main shaft on it;
For described saw blade reciprocating motion driving mechanism provides the motor of power; And
For reducing the balance weight assembly of saw blade vibration, described balance weight assembly comprises pivotable balance weight connecting portion and to be connected on described balance weight connecting portion and can along the balance weight with the movement in the opposite direction of described motion of main shaft side;
It is characterized in that, described balance weight connecting portion comprise sector gear and with described sector gear all-in-one-piece linking arm, described balance weight assembly also comprises the tooth bar engaged with described sector gear, when described spindle reciprocating motion, by engaging between described sector gear with described tooth bar, described linking arm drives described balance weight to move in the opposite direction along with described motion of main shaft side.
Preferably, described balance weight connecting portion is pivotally mounted on described main shaft by pivot, described linking arm has vertically extending bearing pin of turning up the soil with described pivotal interval, described bearing pin drives described balance weight to move in the opposite direction along with described motion of main shaft side.
Preferably, the distance between described pivot and described bearing pin is chosen to, and makes when described motion of main shaft moves to rear side to described balance weight during front side, and when described motion of main shaft on rear side of time described balance weight move to.
Preferably, described balance weight comprises the first elongated slot and the second elongated slot that arrange at interval along straight line and relative to described first elongated slot and vertically extending 3rd elongated slot of described second elongated slot, first alignment pin and the second alignment pin are each passed through described first elongated slot and described second elongated slot, and described bearing pin is through described 3rd elongated slot.
Preferably, described saw blade reciprocating motion driving mechanism comprises the first half housings and the second half housings, described main shaft is through the guiding sleeve be fixed on described the first half housings, described tooth bar is fixed on described the first half housings, and described first alignment pin and described second alignment pin are fixed on described the second half housings.
Preferably, the center of described 3rd elongated slot between described first elongated slot and described second elongated slot and keeping at a certain distance away relative to described first elongated slot and described second elongated slot in vertical direction.
Preferably, described pivot and described first elongated slot and described second elongated slot are located along the same line.
Preferably, described guiding sleeve is fixed on described the first half housings by clamping plate, and described clamping plate also restarts guiding function to described balance.
Preferably, described saw blade reciprocating motion driving mechanism also comprises the first bevel gear be connected with the output shaft of described motor and the second bevel gear engaged with described first bevel gear, described second bevel gear is provided with cam pin, described cam pin be accommodated on the end of described main shaft with the vertically extending slit of its longitudinal axis.
Preferably, the other end of described main shaft is provided with the saw blade clamping device for clamping saw blade.
According to reciprocating saw of the present invention, because balance weight can have larger stroke, even if when adopting the balance weight of less quality, also good effectiveness in vibration suppression can be obtained, and the weight saving of whole reciprocating saw can be made, volume reduces and compact conformation.
Accompanying drawing explanation
Fig. 1 is the stereogram of reciprocating saw according to the preferred embodiment of the invention, wherein, for the sake of clarity, eliminates shell and the saw blade of reciprocating saw;
Fig. 2 is the side view of reciprocating saw shown in Fig. 1, wherein, eliminates the baffle plate of reciprocating saw;
Fig. 3 is the exploded perspective view of reciprocating saw shown in Fig. 2;
Fig. 4 is the rough schematic view when the most forward position of main axle moving according to reciprocating saw of the present invention; And
Fig. 5 is the rough schematic view when the last side position of main axle moving according to reciprocating saw of the present invention.
Detailed description of the invention
The preferred embodiments of the present invention are described in detail below in conjunction with example.It will be understood by those skilled in the art that these exemplary embodiments and do not mean that and any restriction is formed to the present invention.
Fig. 1 is the stereogram of reciprocating saw according to the preferred embodiment of the invention, and Fig. 2 is the side view of reciprocating saw shown in Fig. 1, and Fig. 3 is the exploded perspective view of reciprocating saw shown in Fig. 2.For the sake of clarity, eliminate shell and the saw blade of reciprocating saw in fig. 1-3, in Fig. 2-3, also eliminate the baffle plate of reciprocating saw.As illustrated in fig. 1 and 2, reciprocating saw 1 comprises saw blade reciprocating motion driving mechanism 3, provides the motor 5 of power and the switch 7 for the operation that controls motor 5 for saw blade reciprocating motion driving mechanism 3 according to the preferred embodiment of the invention.Preferably, reciprocating saw 1 also comprises the baffle plate 9 be arranged on front side of saw blade reciprocating motion driving mechanism 3 according to the preferred embodiment of the invention.When carrying out cutting operation, baffle plate 9 and cut material, thus can cut in more reliable mode.
Fig. 3 is the exploded perspective view of reciprocating saw shown in Fig. 2.As shown in Figure 3, the saw blade reciprocating motion driving mechanism 3 of reciprocating saw 1 comprises the first half housings 11 and the second half housings 13 according to the preferred embodiment of the invention, and the first half housings 11 and the second half housings 13 can be fixed together by the securing member 15 of such as screw.In the housing 17 that the first half housings 11 and the second half housings 13 are formed, be provided with the first bevel gear 19, first bevel gear 19 be connected with the output shaft of motor 5 engage with the second bevel gear 21 be arranged in housing 17.Second bevel gear 21 is provided with a cam pin 23.A main shaft 25 is provided with slit 27 vertically extending with its longitudinal axis (that is, vibration-direction) in one end that it is positioned at housing 17, and is fixed with the saw blade clamping device 29 for clamping saw blade (not shown) in its one end extended to outside housing 17.Cam pin 23 on second bevel gear 21 is accommodated in the slit 27 on main shaft 25.Preferably, sheath is provided with outside cam pin 23.Main shaft 25 is also through the guiding sleeve 31 be fixed on the first half housings 11.The shape of cross section of guiding sleeve 31 is preferably identical with the shape of cross section of main shaft 25.Preferably, guiding sleeve 31 is fixed by clamping plate 33, and clamping plate 33 is locked on the first half housings 11 by screw 35.Like this, when motor 5 run cause the first bevel gear 19 and and then cause the second bevel gear 21 to rotate time, cam pin 23 drive shaft 25 on the second bevel gear 21 moves back and forth continuously along guiding sleeve 31.
Reciprocating saw 1 also comprises the balance weight assembly for reducing saw blade vibration according to the preferred embodiment of the invention.Balance weight assembly comprises the balance weight connecting portion 39 be pivotally mounted to by pivot 38 on main shaft 25, be connected on balance weight connecting portion 39 and can along the balance weight 41 of the direction movement contrary with main shaft 25 moving direction and the tooth bar 43 be fixed on the first half housings 11.Balance weight connecting portion 39 comprise sector gear 45 and with sector gear 45 all-in-one-piece linking arm 47.The sector gear 45 of balance weight connecting portion 39 engages with the tooth bar 43 be fixed on housing.Linking arm 47 has and pivot 38 vertically extending bearing pin 49 at interval.Balance weight 41 comprises and generally along the first elongated slot 51 and the second elongated slot 53 that straight line arranges at interval and relative to the first elongated slot 51 and vertically extending 3rd elongated slot 55 of the second elongated slot 53.Preferably, the center of the 3rd elongated slot 55 between the first elongated slot 51 and the second elongated slot 53 and keeping at a certain distance away relative to the first elongated slot 51 and the second elongated slot 53 in the perpendicular direction.Be fixed on the first alignment pin 61 in the first installing hole 57 on the second half housings 13 and the second alignment pin 63 be fixed in the second installing hole 59 on the second half housings 13 is each passed through the first elongated slot 51 and the second elongated slot 53 in balance weight 41, and make balance weight 41 can not depart from the first alignment pin 61 and the second alignment pin 63 by the circle folder (not shown) of the lower end being fixed to the first alignment pin 61 and the second alignment pin 63.Meanwhile, the bearing pin 49 on linking arm 47 is through the 3rd elongated slot 55 in balance weight 41.When the first half housings 11 and the second half housings 13 are fixed together by securing member 15, the uper side surface 65 of clamping plate 33 can guide the downside surface of balance weight 41.Preferably, after reciprocating saw assembling, balance weight connecting portion 39 is located along the same line with the first elongated slot 51 in balance weight 41 and the second elongated slot 53 around the pivot 38 of its pivotable.It will be understood by those skilled in the art that it main shaft 25 is also feasible for being installed to by balance weight connecting portion 39 on the first half housings 11 and being installed to by tooth bar 43.In this case, the first elongated slot 51, second elongated slot 53 in balance weight 41 and the setting of the 3rd elongated slot 55 should correspondingly adjust.
Below with reference to Fig. 4 and Fig. 5, the running according to reciprocating saw of the present invention is described.
When operator's operating switch 7 makes motor 5 run, the first bevel gear 19 be arranged on the output shaft of motor 5 is rotated and drives the second bevel gear 21 engaged with the first bevel gear 19 to rotate, and is arranged on cam pin 23 on the second bevel gear 21 and thus causes main shaft 25 linear reciprocating motion under the guiding of guiding sleeve 31 along circular motion by coordinating with the slit 27 on one end of main shaft 25.When main shaft 25 along the direction away from the second bevel gear 21 (namely, forward direction) when moving, the sector gear 45 of the balance weight connecting portion 39 engaged with the tooth bar 43 be fixed on housing rotates clockwise, make to weigh 41 with bearing pin 49 driven equilibrium on sector gear 45 all-in-one-piece linking arm 47 to move along the direction (that is, backward directions) contrary with the direction of motion of main shaft 25.Being arranged on the first elongated slot 51, second elongated slot 53 in balance weight 41 and the 3rd elongated slot 55 makes balance weight 41 only have freedom of motion along main shaft 25 longitudinal direction.As shown in Figure 4, when main shaft 25 to move to along the direction away from the second bevel gear 21 front side time, balance weight 41 moves to rear side along the direction contrary with the direction of motion of main shaft 25, to realize equilibrium function and to play damping effect.
When main shaft 25 along the direction towards the second bevel gear 21 (namely, backward directions) when moving, the sector gear 45 of the balance weight connecting portion 39 engaged with the tooth bar 43 be fixed on housing is along counterclockwise rotating, make to weigh 41 with bearing pin 49 driven equilibrium on sector gear 45 all-in-one-piece linking arm 47 to move along the direction (that is, forward direction) contrary with the direction of motion of main shaft 25.As shown in Figure 5, when main shaft 25 to move to along the direction towards the second bevel gear 21 rear side time, balance weight 41 moves to front side along the direction contrary with the direction of motion of main shaft 25, to realize equilibrium function and to play damping effect.
In the reciprocatory movement of main shaft 25, balance weight 41 plays damping effect all the time.Preferably, by selecting balance weight connecting portion 39 around the suitable distance between the bearing pin 49 on the pivot 38 of its pivotable and linking arm 47, make when main shaft 25 to move to along the direction away from the second bevel gear 21 front side time, balance weight 41 moves to rear side along the direction contrary with the direction of motion of main shaft 25, and when main shaft 25 to move to along the direction towards the second bevel gear 21 rear side time, balance weight 41 moves to front side along the direction contrary with the direction of motion of main shaft 25, thus realizes maximum effectiveness in vibration suppression.
In reciprocating saw according to the present invention, when described main shaft 25 moves back and forth, by engaging between sector gear 45 with tooth bar 43, linking arm 47 driven equilibrium weighs 41 and moves along the direction contrary with main shaft 25 direction of motion, the stroke range of balance weight 41 can maximize, thus better effectiveness in vibration suppression can be realized when the weight of balance weight 41 is relatively little, and then make the weight saving of whole reciprocating saw, volume reduces and compact conformation.
Below in conjunction with specific embodiments to invention has been detailed description.Obviously, above description and embodiment illustrated in the accompanying drawings all should be understood to be exemplary, and are not construed as limiting the invention.Such as, the saw blade reciprocating motion driving mechanism of reciprocating saw can not comprise the first half housings and the second half housings, and the parts be installed in above preferred embodiment on the first half housings and the second half housings can directly be installed on the shell of reciprocating saw.To those skilled in the art, can carry out various modification or amendment when not departing from spirit of the present invention to it, these modification or amendment all do not depart from the scope of the present invention.
Claims (10)
1. a reciprocating saw (1), comprising:
Saw blade reciprocating motion driving mechanism (3), described saw blade reciprocating motion driving mechanism (3) comprises saw blade can be installed to main shaft (25) on it;
For described saw blade reciprocating motion driving mechanism (3) provides the motor (5) of power; And
For reducing the balance weight assembly of saw blade vibration, described balance weight assembly comprises pivotable balance weight connecting portion (39) and is connected to described balance weight connecting portion (39) upper and can along the balance weight (41) of the direction movement contrary with described main shaft (25) direction of motion;
It is characterized in that, described balance weight connecting portion (39) comprise sector gear (45) and with described sector gear (45) all-in-one-piece linking arm (47), described balance weight assembly also comprises the tooth bar (43) engaged with described sector gear (45), when described main shaft (25) moves back and forth, by engaging between described sector gear (45) with described tooth bar (43), described linking arm (47) drives described balance weight (41) to move along the direction contrary with described main shaft (25) direction of motion.
2. reciprocating saw according to claim 1 (1), it is characterized in that, described balance weight connecting portion (39) is pivotally mounted on described main shaft (25) by pivot (38), described linking arm (47) has and described pivot (38) vertically extending bearing pin (49) at interval, described bearing pin (49) drives described balance weight (41) to move along the direction contrary with described main shaft (25) direction of motion.
3. reciprocating saw according to claim 2 (1), it is characterized in that, distance between described pivot (38) and described bearing pin (49) is chosen to, make when described main shaft (25) move to front side time described balance weight (41) move to rear side, and when described main shaft (25) move to rear side time described balance weight (41) move to.
4. reciprocating saw according to claim 2 (1), it is characterized in that, described balance weight (41) comprises the first elongated slot (51) and the second elongated slot (53) that arrange at interval along straight line, and relative to described first elongated slot (51) and vertically extending 3rd elongated slot (55) of described second elongated slot (53), first alignment pin (61) and the second alignment pin (63) are each passed through described first elongated slot (51) and described second elongated slot (53), and described bearing pin (49) is through described 3rd elongated slot (55).
5. reciprocating saw according to claim 4 (1), it is characterized in that, described saw blade reciprocating motion driving mechanism (3) comprises the first half housings (11) and the second half housings (13), described main shaft (25) is through the guiding sleeve (31) be fixed on described the first half housings (11), described tooth bar (43) is fixed on described the first half housings (11), and described first alignment pin (61) and described second alignment pin (63) are fixed on described the second half housings (13).
6. reciprocating saw according to claim 4 (1), it is characterized in that, described 3rd elongated slot (55) is positioned at the center between described first elongated slot (51) and described second elongated slot (53) and keeps at a certain distance away relative to described first elongated slot (51) and described second elongated slot (53) in vertical direction.
7. reciprocating saw according to claim 4 (1), is characterized in that, described pivot (38) is located along the same line with described first elongated slot (51) and described second elongated slot (53).
8. reciprocating saw according to claim 5 (1), is characterized in that, described guiding sleeve (31) is fixed on described the first half housings (11) by clamping plate (33), and described clamping plate (33) also plays guiding function to described balance weight (41).
9. reciprocating saw according to claim 1 (1), it is characterized in that, described saw blade reciprocating motion driving mechanism (3) also comprises the first bevel gear (19) be connected with the output shaft of described motor (5) and the second bevel gear (21) engaged with described first bevel gear (19), described second bevel gear (21) is provided with cam pin (23), described cam pin (23) be accommodated on the end of described main shaft (25) with the vertically extending slit of its longitudinal axis (27).
10. reciprocating saw according to claim 9 (1), is characterized in that, the other end of described main shaft (25) is provided with the saw blade clamping device (29) for clamping saw blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310400886.4A CN104416225B (en) | 2013-09-05 | 2013-09-05 | Reciprocating saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310400886.4A CN104416225B (en) | 2013-09-05 | 2013-09-05 | Reciprocating saw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104416225A true CN104416225A (en) | 2015-03-18 |
| CN104416225B CN104416225B (en) | 2018-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310400886.4A Active CN104416225B (en) | 2013-09-05 | 2013-09-05 | Reciprocating saw |
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| CN (1) | CN104416225B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508869A (en) * | 2019-07-31 | 2019-11-29 | 浙江开创电气股份有限公司 | Reciprocating saw |
| CN113145933A (en) * | 2021-04-27 | 2021-07-23 | 宁波南浦机电有限公司 | Multifunctional reciprocating cutting tool |
| CN117020306A (en) * | 2023-08-09 | 2023-11-10 | 浙江通达电器有限公司 | Reciprocating saw equipped with clamp |
| US11839964B2 (en) | 2022-03-09 | 2023-12-12 | Black & Decker Inc. | Counterbalancing mechanism and power tool having same |
| US11958121B2 (en) | 2022-03-04 | 2024-04-16 | Black & Decker Inc. | Reciprocating tool having orbit function |
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| GB2181693A (en) * | 1985-09-27 | 1987-04-29 | Black & Decker Inc | Improvements in and relating to power tools |
| EP0561473B1 (en) * | 1992-03-18 | 1998-01-21 | S-B Power Tool Company | Counterbalanced orbital drive mechanism for saws and the like |
| CN1496772A (en) * | 2002-10-07 | 2004-05-19 | ������-�¿˶���˾ | Reciprocating-type saw |
| US20080010840A1 (en) * | 1999-06-04 | 2008-01-17 | Lagaly Michael A | Bearing structure for a reciprocating shaft in a reciprocating saw |
| CN101244471A (en) * | 2007-02-13 | 2008-08-20 | 罗伯特·博世有限公司 | Linkage drive mechanism for a reciprocating tool |
| CN101596620A (en) * | 2008-06-05 | 2009-12-09 | 苏州宝时得电动工具有限公司 | Reciprocal cutting tool |
-
2013
- 2013-09-05 CN CN201310400886.4A patent/CN104416225B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2181693A (en) * | 1985-09-27 | 1987-04-29 | Black & Decker Inc | Improvements in and relating to power tools |
| EP0561473B1 (en) * | 1992-03-18 | 1998-01-21 | S-B Power Tool Company | Counterbalanced orbital drive mechanism for saws and the like |
| US20080010840A1 (en) * | 1999-06-04 | 2008-01-17 | Lagaly Michael A | Bearing structure for a reciprocating shaft in a reciprocating saw |
| CN1496772A (en) * | 2002-10-07 | 2004-05-19 | ������-�¿˶���˾ | Reciprocating-type saw |
| CN101244471A (en) * | 2007-02-13 | 2008-08-20 | 罗伯特·博世有限公司 | Linkage drive mechanism for a reciprocating tool |
| CN101596620A (en) * | 2008-06-05 | 2009-12-09 | 苏州宝时得电动工具有限公司 | Reciprocal cutting tool |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508869A (en) * | 2019-07-31 | 2019-11-29 | 浙江开创电气股份有限公司 | Reciprocating saw |
| CN113145933A (en) * | 2021-04-27 | 2021-07-23 | 宁波南浦机电有限公司 | Multifunctional reciprocating cutting tool |
| 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 |
| CN117020306A (en) * | 2023-08-09 | 2023-11-10 | 浙江通达电器有限公司 | Reciprocating saw equipped with clamp |
| CN117020306B (en) * | 2023-08-09 | 2025-03-25 | 浙江通达电器有限公司 | Reciprocating saw with clamp |
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| Publication number | Publication date |
|---|---|
| CN104416225B (en) | 2018-06-26 |
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