CN201353721Y - Sander double-chassis structure - Google Patents
Sander double-chassis structure Download PDFInfo
- Publication number
- CN201353721Y CN201353721Y CNU2009200371059U CN200920037105U CN201353721Y CN 201353721 Y CN201353721 Y CN 201353721Y CN U2009200371059 U CNU2009200371059 U CN U2009200371059U CN 200920037105 U CN200920037105 U CN 200920037105U CN 201353721 Y CN201353721 Y CN 201353721Y
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- chassis
- sander
- axial line
- dual
- chassis structure
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Abstract
A sander double-chassis structure is connected on a motor shaft (21) of a motor (2) which provides drive force, wherein the motor shaft (21) is provided with a shaft center line X. The double-chassis structure comprises an inner chassis (4) and an outer chassis (5) which are arranged in an embedded way, and further comprises a connecting disc connected with the motor shaft (21), and the inner chassis (4) and the outer chassis (5) are simultaneously connected on the connecting disc. The inner chassis (4) is provided with a shaft center line Y, the outer chassis (5) is provided with a shaft center line Z, and the shaft center line Y and the shaft center line Z are respectively arranged on two sides of the shaft center line X. The inner chassis and the outer chassis are respectively connected on a fan, have a phase difference of 180 degrees, and avoid the shortcomings of higher overall height and higher gravity center caused by that the output shaft is connected with the inner chassis and the outer chassis in turn in the axial direction. The inner chassis and the outer chassis are respectively connected with the fan, and the sander double-chassis structure has simple structure and convenient assembly, and can reach the effects of balancing and vibrating.
Description
Technical field
The utility model relates to a kind of hand-held class power tool, especially a kind of eccentric rotation class power tool, and as sander, the Double bottom dish structure on more particularly a kind of sander.
Background technology
Hand-held class power tool especially adopts the power tool of eccentric rotation mode, because its working head is arranged off-centre for driving shaft, therefore, in rotary course and cause easily and be subjected to force unbalance, causes the bigger problem of vibrations.If the user is behind this eccentric rotation class power tool of long-term use, it is numb to be easy to palm, causes diseases such as hand joint injury.Thereby industry has proposed different solutions at this problem.
Comparatively commonly in off-centre rotation class power tool, increase the mode of balance weight.This balance weight is 180 ° of phase differences with the eccentric shaft that drives working head to be arranged, can alleviate certain eccentric shaking, helps the user and protects wrist, and improved the comfort level of user's operation.
Chinese patent application CN200510067539.X has proposed another kind of solution.A kind of eccentric rotation class power tool is provided in this patent application, has been specially sander, it comprises two working heads, and is the internal and external disk nested arrangement, and promptly Nei Bu working head is dish, and outside working head ringwise.These two working heads all adopt eccentric mode to be connected on the output shaft of motor, and still, there are 180 ° of phase differences in the eccentric angle difference of internal and external disk between the two.Promptly the axial line with output shaft is the center, when inside turn goes to off-centered right-most position, inverted position turn goes to off-centered left-most position, and when inside turn went to off-centered left-most position, inverted position turn went to off-centered right-most position.In a word, always there is 180 ° phase difference between the position of the two with respect to axial line.
Adopt in such a way, owing to the eccentric chassis that is provided with phase difference by self in rotary course, the vibrations that eccentric rotation brings have been offset, entire machine is in use remained under a kind of dynamically balanced state always, thereby for the user, reduce numb feel and felt, promoted the comfortableness of operation.
But because in this scheme, the output shaft of motor need connect internal and external disk respectively, has promptly connected outer dish bearing and inner disc bearing in the axial direction successively, makes integral body higher, center of gravity is also higher.Because center of gravity is higher also is to cause machine in use to shake a big factor.For the influence that the elimination vibrations of trying one's best bring, the position of centre of gravity of machine also is the factor that needs consideration.
Therefore, prior art is necessary further improvement in fact.
The utility model content
The purpose of this utility model is to provide a kind of dual-chassis structure of sander, its compact conformation, and complete machine height and center of gravity are all lower, shake also less.
For achieving the above object, the utility model provides a kind of dual-chassis structure of sander, be connected on the motor drive shaft of the motor that driving force is provided, wherein motor drive shaft has axial line X, Double bottom dish structure comprises interior chassis and the outer chassis that is nested setting, comprises that also the terminal pad that is connected with motor drive shaft, described interior chassis and outer chassis are connected on the terminal pad simultaneously, and interior chassis has axial line Y, outer chassis has axial line Z, and described axial line Y and axial line Z lay respectively at the both sides of axial line X.
As the improvement to such scheme, described axial line Y, X, Z are positioned on the straight line successively.
Described terminal pad is a fan, and it comprises the neck that is provided with respect to axial line X skew, and described neck is provided with the accepting groove that is provided with respect to axial line X skew.
Described neck and accepting groove are overlapping in the axial direction.
There are 180 ° of phase differences between described neck and the accepting groove.
The chassis is fixedly connected on the accepting groove by screw in described.
Be provided with the axle center pin and sleeve in the described accepting groove and be located at the clutch shaft bearing that sell in the axle center, and support by the sealing of first baffle plate.
Described first baffle plate is provided with perforation, and described screw passes perforation and is threaded with the axle center pin.
Described outer chassis is fixedly connected on the neck by outer dish bracing frame.
The outside of described neck is arranged with second bearing, and described outer dish bracing frame is set on second bearing, and supports second bearing by the second baffle sealing.
Adopted in the utility model internal and external disk is connected on the fan, and had 180 ° phase difference between the two, it is higher to have avoided output shaft to connect the complete machine height that causes in interior chassis and outer chassis in the axial direction successively, the drawback that center of gravity is also higher.And internal and external disk connects fan respectively, and it is simple in structure, and is easy to assembly, can reach the effect of balance vibrations equally.
Description of drawings
Fig. 1 is the schematic diagram that adopts the sander of Double bottom dish structure in the preferred embodiment of the present utility model.
Fig. 2 is the three-dimensional explosive view of this dual-chassis structure of sander.
Fig. 3 a is the user mode reference diagram of this dual-chassis structure of sander, and at this moment, inside turn goes to the leftmost side of departing from central shaft.
Fig. 3 b is the user mode reference diagram of this dual-chassis structure of sander, and at this moment, inside turn goes to the rightmost side of departing from central shaft.
Fig. 4 a is the rotation principle schematic of Double bottom dish structure, and at this moment, inner disc is positioned at 0 ° of position.
Fig. 4 b is the rotation principle schematic of Double bottom dish structure, and at this moment, inner disc is positioned at 90 ° of positions.
Fig. 4 c is the rotation principle schematic of Double bottom dish structure, and at this moment, inner disc is positioned at 180 ° of positions.
Fig. 4 d is the rotation principle schematic of Double bottom dish structure, and at this moment, inner disc is positioned at 270 ° of positions.
Related elements reference numeral in the diagram is as follows:
1, housing 2, motor 3, fan
4, interior chassis 5, outer chassis 21, motor drive shaft
31, neck 32, accepting groove 33, axle center pin
34, clutch shaft bearing 35, first baffle plate 351, perforation
36, second bearing 37, coil bracing frame 38, second baffle outward
39, screw
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments.
Seeing also Fig. 1 to Fig. 2, is that example describes with the sander in the most preferred embodiment of the present utility model.A kind of sander that adopts Double bottom dish structure comprises casing 1 and the motor 2 that is arranged on casing 1 inside.Motor 2 is used to provide driving force, comprises motor drive shaft 21, and its corresponding axial line is X.A terminal pad is specially fan 3, is connected on the motor drive shaft 21, comprise neck 31 and flabellum portion, neck 31 is eccentric with respect to axial line X and is provided with, simultaneously, on the neck 31 with respect to axial line X also eccentric be provided with accepting groove 32, thereby make neck 31 form the circulus of an off-centre.It should be noted that, neck 31 differs 180 ° of phase differences with respect to the off-centre setting of axial line X and accepting groove 32 with respect to the off-centre setting of axial line X, thereby make accepting groove 32 have an axial line Y with respect to axial line X skew, there is an axial line Z with respect to axial line X skew in neck 31.Axial line X, Y, Z are co-located in the plane, and perhaps axial line Y, Z lay respectively at the both sides of axial line X.
In the interior ring of described circulus, promptly in the accepting groove 32, an axle center pin 33 and the clutch shaft bearing 34 that is set on the axle center pin 33 are contained in this, and support by 35 sealings of one first baffle plate.Simultaneously, one second bearing 36 is set on the outer shroud of circulus, i.e. the outside of neck 31, and an outer shroud bracing frame 37 is set on second bearing 36, and supports second bearing 36 by 38 sealings of a second baffle.First baffle plate 35 is provided with 351, one screws 39 of perforation and passes interior chassis 4, and is inserted into the axle center pin 33 that is arranged in accepting groove 32 always, in the mode that is threaded interior chassis 4 is fixedly connected on the fan 3.Simultaneously, outer chassis 5 is connected on the outer dish bracing frame 37, and promptly outer chassis 5 also is to be connected on the fan 3.
Thereby the interior chassis 4 that is connected simultaneously on the fan 3 forms inside and outside nested Double bottom dish structure with outer chassis 5.In this structure, the assembly structure of complete machine is comparatively compact, has reduced the height of complete machine greatly, makes the center of gravity of complete machine also obtain reduction simultaneously.
See also Fig. 3, the Double bottom dish sander in the utility model illustrates rotary principle respectively by two state points in the course of work.The motor drive shaft 21 of motor 2 has axial line X, is connected the axial line Y that interior chassis 4 on the accepting groove 32 has skew, is connected the axial line Z that outer chassis 5 on the neck 31 has skew.
Shown in Fig. 3 a, the interior chassis 4 of this moment rotates to the leftward position of skew axial line X, and its axial line Y also is positioned at the left side of axial line X, and simultaneously, outer chassis 5 will rotate to the right positions of skew axial line X, and its axial line Z also is positioned at the right side of axial line X.
Shown in Fig. 3 b, the interior chassis 4 of this moment rotates to the right positions of skew axial line X for another example, and its axial line Y also is positioned at the right side of axial line X, and simultaneously, outer chassis 5 will rotate to the leftward position of skew axial line X, and its axial line Z also is positioned at the left side of axial line X.Because the interior chassis 4 of being adopted is identical haply with respect to the rotating torque of axial line X with outer chassis 5, therefore they are also roughly the same because of the vibrations that the off-centre rotation brings, but by 180 ° of phase differences between the two, the vibrations of the two are cancelled, thereby make machine keep a kind of dynamic equilibrium state on the whole.Help reducing vibrations like this, promote user's operational comfort.
Only enumerated rotary principle on the both direction of Double bottom dish sander among Fig. 3.See also Fig. 4, from the rotation diagram of Double bottom dish, provided rotary principle explanation on the circumference four direction.
Shown in Fig. 4 a, the interior chassis 4 of this moment is arranged in the low order end of rotation process, and this point is defined as 0 ° of point, and simultaneously, outer chassis 5 is arranged in the rotation process high order end.Axial line Y, the X on interior chassis 4, motor drive shaft 21 and outer chassis 5, Z are positioned on the horizontal straight line successively.
Shown in Fig. 4 b, the interior chassis 4 of this moment is arranged in the top of rotation process, and this point is defined as 90 ° of points, and simultaneously, outer chassis 5 is arranged in rotation process bottom.Axial line Y, the X on interior chassis 4, motor drive shaft 21 and outer chassis 5, Z are positioned at one longitudinally on the straight line successively.
Shown in Fig. 4 c, the interior chassis 4 of this moment is arranged in the high order end of rotation process, and this point is defined as 180 ° of points, and simultaneously, outer chassis 5 is arranged in the rotation process low order end.Axial line Y, the X on interior chassis 4, motor drive shaft 21 and outer chassis 5, Z are positioned on the horizontal straight line successively, but the order with Fig. 4 a in opposite.
Shown in Fig. 4 d, the interior chassis 4 of this moment is arranged in rotation process bottom, and this point is defined as 360 ° of points, and simultaneously, outer chassis 5 is arranged in rotation process topmost.Axial line Y, the X on interior chassis 4, motor drive shaft 21 and outer chassis 5, Z are positioned at one longitudinally on the straight line successively, but opposite among order and Fig. 4 b.In the rotation process of Double bottom dish, the slewing area of internal and external disk all is between above-mentioned four points, and rotation situation also all is identical, and promptly axial line Y, X, Z are positioned on the straight line successively.
Certainly, axial line Y, X, Z are positioned on the straight line successively, are best embodiments, can reach dynamically balanced state to greatest extent, but for situations such as technology and wearing and tearing, also can produce axial line Y, X, Z is positioned on the straight line, and make result of use a bit weaker.But such application is still within protection domain of the present utility model.
Double bottom dish structure disclosed in the utility model be with sander as specific embodiment, but be not just to be confined to be applied on the sander.In other multiple eccentric rotary class power tools, can use such Double bottom dish structure equally.
Claims (10)
1, a kind of dual-chassis structure of sander, be connected on the motor drive shaft (21) of the motor (2) that driving force is provided, wherein motor drive shaft (21) has axial line X, Double bottom dish structure comprises interior chassis (4) and outer chassis (5) that are nested setting, it is characterized in that: also comprise the terminal pad that is connected with motor drive shaft (21), described in chassis (4) and outer chassis (5) be connected on the terminal pad simultaneously, interior chassis (4) has axial line Y, outer chassis (5) has axial line Z, and described axial line Y and axial line Z lay respectively at the both sides of axial line X.
2, dual-chassis structure of sander as claimed in claim 1 is characterized in that: described axial line Y, X, Z are positioned on the straight line successively.
3, dual-chassis structure of sander as claimed in claim 1, it is characterized in that: described terminal pad is fan (3), it comprises the neck (31) that is provided with respect to axial line X skew, and described neck (31) is provided with the accepting groove (32) that is provided with respect to axial line X skew.
4, dual-chassis structure of sander as claimed in claim 3 is characterized in that: described neck (31) and accepting groove (32) are overlapping in the axial direction.
5, dual-chassis structure of sander as claimed in claim 4 is characterized in that: have 180 ° of phase differences between described neck (31) and the accepting groove (32).
6, dual-chassis structure of sander as claimed in claim 5 is characterized in that: chassis (4) is fixedly connected on the accepting groove (32) by screw (39) in described.
7, dual-chassis structure of sander as claimed in claim 6 is characterized in that: is provided with axle center pin (33) in the described accepting groove (32) and is set in clutch shaft bearing (34) on the axle center pin (33), and by first baffle plate (35) sealing support.
8, dual-chassis structure of sander as claimed in claim 7 is characterized in that: described first baffle plate (35) is provided with perforation (351), and described screw (39) passes perforation (351) and is threaded with axle center pin (33).
9, dual-chassis structure of sander as claimed in claim 5 is characterized in that: described outer chassis (5) is fixedly connected on the neck (31) by outer dish bracing frame (37).
10, dual-chassis structure of sander as claimed in claim 9, it is characterized in that: the outside of described neck (31) is arranged with second bearing (36), described outer dish bracing frame (37) is set on second bearing (36), and supports second bearing (36) by second baffle (38) sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200371059U CN201353721Y (en) | 2009-02-13 | 2009-02-13 | Sander double-chassis structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200371059U CN201353721Y (en) | 2009-02-13 | 2009-02-13 | Sander double-chassis structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201353721Y true CN201353721Y (en) | 2009-12-02 |
Family
ID=41410061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200371059U Expired - Fee Related CN201353721Y (en) | 2009-02-13 | 2009-02-13 | Sander double-chassis structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201353721Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001034A (en) * | 2010-09-20 | 2011-04-06 | 铁鎯电动工具有限公司 | Positive and negative rotation polishing machine |
| CN101804597B (en) * | 2009-02-12 | 2012-07-04 | 苏州宝时得电动工具有限公司 | Dual-chassis structure of sander |
| CN103252697A (en) * | 2012-02-16 | 2013-08-21 | 苏州宝时得电动工具有限公司 | Sander |
| WO2015077988A1 (en) * | 2013-11-29 | 2015-06-04 | Black & Decker Inc. | Sander having two-piece fan |
-
2009
- 2009-02-13 CN CNU2009200371059U patent/CN201353721Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101804597B (en) * | 2009-02-12 | 2012-07-04 | 苏州宝时得电动工具有限公司 | Dual-chassis structure of sander |
| CN102001034A (en) * | 2010-09-20 | 2011-04-06 | 铁鎯电动工具有限公司 | Positive and negative rotation polishing machine |
| CN102001034B (en) * | 2010-09-20 | 2013-04-10 | 铁鎯电动工具有限公司 | Positive and negative rotation polishing machine |
| CN103252697A (en) * | 2012-02-16 | 2013-08-21 | 苏州宝时得电动工具有限公司 | Sander |
| WO2015077988A1 (en) * | 2013-11-29 | 2015-06-04 | Black & Decker Inc. | Sander having two-piece fan |
| US9102048B2 (en) | 2013-11-29 | 2015-08-11 | Black & Decker Inc. | Sander having two-piece fan |
| US9545712B2 (en) | 2013-11-29 | 2017-01-17 | Black & Dekcer Inc. | Sander having two-piece fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091202 Termination date: 20170213 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |