CN102019607B - Swinging power tool - Google Patents
Swinging power tool Download PDFInfo
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- CN102019607B CN102019607B CN200910178065.4A CN200910178065A CN102019607B CN 102019607 B CN102019607 B CN 102019607B CN 200910178065 A CN200910178065 A CN 200910178065A CN 102019607 B CN102019607 B CN 102019607B
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- power tool
- swing
- motor
- eccentric wheel
- output shaft
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Abstract
The invention discloses a swinging power tool which comprises a shell (1) and a motor (2) arranged inside the shell (1), wherein the motor (2) is provided with a motor shaft (20), and an output shaft (5) extending from the inside of the shell (1), wherein an eccentric wheel (3) and a shifting fork assembly (4) are connected between the output shaft (5) and the motor shaft (20) so that the output shaft (5) swings around the shaft axis of the output shaft per se. The swinging power tool also comprises an eccentric shaft sleeve (6) arranged between the motor shaft (20) and the eccentric wheel (3) and supported by two supporting bearings (7 and 8) provided with parallel end faces, and the supporting bearings (7 and 8) are positioned at the same side of the eccentric wheel (3) and the shifting fork assembly (4). Because the eccentric shaft sleeve sleeved with a balance block is arranged inside the shell through the two parallel supporting bearings, the invention can effectively avoid the deflection caused by the motor shaft due to the balance block, plays a role of stabilizing the eccentric shaft sleeve and the motor shaft, and lightens the noises.
Description
Technical field
The present invention relates to a kind of swing-type power tool of hand-held.
Background technology
Multi Role Aircraft is the swing-type power tool of the common hand-held of industry, and to be output shaft do oscillating motion around self axial line for its operation principle.Therefore, after user is provided with different operating head attachment on output shaft, multiple different operating function can be realized.Common operating head attachment comprises straight blade, saw blade, triangle frosted dish, scraper etc., can realize as work requirements such as sawing, cut, grind, scrape.
In traditional Multi Role Aircraft, because output shaft is directly connected with motor by transmission mechanism, the operations such as deceleration were not carried out in centre, and thus vibration frequency is comparatively large, usually maintains 5000 to 20000 revolution per seconds.Like this, swing mechanism is shaken in the course of the work comparatively large, seismaesthesia is comparatively strong, for the long-time use of user causes inconvenience.Therefore, industry have developed a solution and addresses this problem.
U.S. Patent application US20070094877A discloses a kind of swing-type power tool with balanced compensated structure, its free end at motor drive shaft is also connected with an excentric sleeve, described excentric sleeve comprises two parts, a part has been the effect of connecting pin, connect for eccentric wheel, and another part is the effect of balance weight, namely relative to eccentric wheel, be extended with the projection of larger volume in the other side of motor drive shaft, thus form balance block structure.
Adopt in such a way, when eccentric wheel eccentric rotary is to the below near motor drive shaft, then balance weight eccentric rotary is to the upside near motor drive shaft, and vice versa.So, eccentric eccentric rotational motion, will be balanced the dynamic compensation of block, thus make swing mechanism keep a kind of dynamic balance state, be conducive to reducing the vibrations that output shaft produces.
But such scheme, owing to being connected to eccentric balance weight on the motor, can affecting to motor drive shaft itself, namely can cause motor drive shaft beat, and then cause vibrations and noise problem.
Therefore, prior art is real is necessary further improvement.
Summary of the invention
The object of the present invention is to provide a kind of swing-type power tool, the eccentricities of motor drive shaft can be avoided.
For achieving the above object, the invention provides a kind of swing-type power tool, comprise housing and be arranged on the motor of enclosure interior, described motor has motor drive shaft, the output shaft extended in housing, eccentric wheel and pull-fork assembly is connected with between described output shaft and motor drive shaft, output shaft is made to do oscillating motion around Pivot Point Center line, described swing-type power tool also comprises the excentric sleeve be arranged between motor drive shaft and eccentric wheel, two spring bearings that described excentric sleeve is be arranged in parallel by end face support, and described spring bearing is positioned at the same side of eccentric wheel and pull-fork assembly.
Preferably,
Described excentric sleeve is also arranged with balance weight, and described balance weight is between two spring bearings.
The periphery of described spring bearing has the groove circumferentially gone up, and in described groove, contain O type circle.
O type circle is also provided with between the periphery of described spring bearing and the inner side of housing.
Described excentric sleeve comprises connecting pin and main body, and connecting pin and main body are non-coaxial setting, and described spring bearing support and connection are in the main body of described excentric sleeve.
Described spring bearing is deep groove ball bearing.
In the present invention, because the excentric sleeve being arranged with balance weight to be arranged on the inside of casing by the spring bearing of two side by side, motor drive shaft effectively can be avoided to bring beat problem because of balance weight, serve the effect of stable excentric sleeve and motor drive shaft, also mitigate noise simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of swing-type power tool of the present invention.
Related elements reference numeral in diagram is as follows:
1, housing 2, motor 3, eccentric wheel
4, pull-fork assembly 5, output shaft 6, axle sleeve
7, bearing 8, bearing 9, balance weight
10, O type circle 20, motor drive shaft 61, connecting pin
62, main body 71, groove 81, groove
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Refer to Fig. 1, a kind of swing-type power tool, comprise casing 1, motor 2, eccentric wheel 3, pull-fork assembly 4 and output shaft 5.Wherein, casing 1 is roughly in tubular structure, and its front end (in Fig. 1, right side is defined as front end) forms angle bending; Motor 2 is arranged on the inside of casing 1, and has motor drive shaft 20; Output shaft 5 extends from the angle bending place of casing 1, by the moment of torsion transmission effect of eccentric wheel 3 and pull-fork assembly 4, output shaft 5 can be made to do oscillating motion around own axes X.Here, by the swing mechanism that the mode of eccentric wheel 3 and pull-fork assembly 4 transmitting torque adopts industry common between motor drive shaft 20 and output shaft 5, be not described in detail in the present invention.
Please continue to refer to Fig. 1, motor drive shaft 20 is also connected with an excentric sleeve 6, described excentric sleeve 6 has two parts, is respectively connecting pin 61 and main body 62, and connecting pin 61 and main body 62 are arranged in non-coaxial.Connecting pin 61 is arranged with eccentric wheel 3, main body 62 is then connected with motor drive shaft 20.Thus, when motor drive shaft 20 produce rotate time, drive excentric sleeve 6 also to produce rotation, due to connecting pin 61 relative to motor drive shaft 20 in eccentric setting, and then band movable eccentric wheel 3 also produces eccentric rotary relative to motor drive shaft 20.Outside the periphery of main body 62, be provided with two spring bearings 7,8 that end face is parallel, for being supported by excentric sleeve 6.It should be noted that, these two spring bearings 7,8 are positioned at the same side of eccentric wheel 3 and pull-fork assembly 4, and, between two spring bearings 7,8, a balance weight 9 is also arranged with in the periphery of excentric sleeve 6, the center of gravity of described balance weight 9 has the phase difference of 180 ° relative to eccentric wheel 3, compensate effect for the vibrations caused the eccentric rotary of eccentric wheel 3.
Please continue to refer to Fig. 1, in the periphery of each spring bearing 7,8, be also formed with a groove 71,81 circumferentially, and contain O type circle 10 in groove 71,81, can effectively prevent relatively rotating of bearing outer ring, and there is certain damping effect.Described spring bearing 7,8 can also adopt the deep groove ball bearing of industry extensive use.
In the present invention, because the excentric sleeve 6 being arranged with balance weight 9 to be arranged on the inside of casing 1 by parallel two spring bearings 7,8, can effectively avoid excentric sleeve 6 because of balance weight 7 bring beat problem, serve the effect of stable excentric sleeve 6 and motor drive shaft 20, also mitigate noise simultaneously.
Claims (5)
1. a swing-type power tool, comprise housing (1) and be arranged on the inner motor (2) of housing (1), described motor (2) has motor drive shaft (20), the output shaft (5) extended in housing (1), eccentric wheel (3) and pull-fork assembly (4) is connected with between described output shaft (5) and motor drive shaft (20), make output shaft (5) do swing-type power tool described in oscillating motion around Pivot Point Center line and also comprise the excentric sleeve (6) be arranged between motor drive shaft (20) and eccentric wheel (3), it is characterized in that: two spring bearings (7 that described excentric sleeve (6) is be arranged in parallel by end face, 8) support, and described spring bearing (7, 8) the same side of eccentric wheel (3) and pull-fork assembly (4) is positioned at, described excentric sleeve (6) is also arranged with balance weight (9), and described balance weight (9) is positioned at two spring bearings (7, 8) between.
2. swing-type power tool as claimed in claim 1, it is characterized in that: the periphery of described spring bearing (7,8) has the groove (71,81) circumferentially gone up, and (contains O type circle (10) in 10 at described groove.
3. swing-type power tool as claimed in claim 1, is characterized in that: be also provided with O type circle (10) between the periphery of described spring bearing (7,8) and the inner side of housing (1).
4. swing-type power tool as claimed in claim 1, it is characterized in that: described excentric sleeve (6) comprises connecting pin (61) and main body (62), and connecting pin (61) and main body (62) non-coaxial are arranged, and described spring bearing (7,8) support and connection are in the main body (62) of described excentric sleeve (6).
5. swing-type power tool as claimed in claim 1, is characterized in that: described spring bearing (7,8) is deep groove ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910178065.4A CN102019607B (en) | 2009-09-22 | 2009-09-22 | Swinging power tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910178065.4A CN102019607B (en) | 2009-09-22 | 2009-09-22 | Swinging power tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102019607A CN102019607A (en) | 2011-04-20 |
| CN102019607B true CN102019607B (en) | 2014-12-17 |
Family
ID=43861597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910178065.4A Active CN102019607B (en) | 2009-09-22 | 2009-09-22 | Swinging power tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102019607B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104249339A (en) * | 2013-06-25 | 2014-12-31 | 苏州宝时得电动工具有限公司 | Swinging power tool |
| CN105328647B (en) * | 2014-06-30 | 2017-08-29 | 南京德朔实业有限公司 | Multi-purpose power tool |
| CN106737447B (en) * | 2015-11-25 | 2021-08-10 | 苏州宝时得电动工具有限公司 | Swing power tool |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87211413U (en) * | 1987-08-04 | 1988-03-23 | 中国人民解放军88医院 | Electric bone saw with all-angle swing |
| CN2238028Y (en) * | 1994-05-26 | 1996-10-23 | 郭晓松 | Rocking type electric toothbrush |
| CN101032416A (en) * | 2007-03-30 | 2007-09-12 | 苏州华晟手术医疗器械有限公司 | Medical swing saw |
| CN101044340A (en) * | 2004-10-19 | 2007-09-26 | 罗伯特·博世有限公司 | Eccentric gear with an imbalance compensation element |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201529978U (en) * | 2009-09-22 | 2010-07-21 | 苏州宝时得电动工具有限公司 | Oscillating power tool |
-
2009
- 2009-09-22 CN CN200910178065.4A patent/CN102019607B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87211413U (en) * | 1987-08-04 | 1988-03-23 | 中国人民解放军88医院 | Electric bone saw with all-angle swing |
| CN2238028Y (en) * | 1994-05-26 | 1996-10-23 | 郭晓松 | Rocking type electric toothbrush |
| CN101044340A (en) * | 2004-10-19 | 2007-09-26 | 罗伯特·博世有限公司 | Eccentric gear with an imbalance compensation element |
| CN101032416A (en) * | 2007-03-30 | 2007-09-12 | 苏州华晟手术医疗器械有限公司 | Medical swing saw |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102019607A (en) | 2011-04-20 |
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