CN207841048U - Sanding device - Google Patents
Sanding device Download PDFInfo
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- CN207841048U CN207841048U CN201721534969.2U CN201721534969U CN207841048U CN 207841048 U CN207841048 U CN 207841048U CN 201721534969 U CN201721534969 U CN 201721534969U CN 207841048 U CN207841048 U CN 207841048U
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- sanding device
- eccentric element
- matching hole
- output shaft
- bottom plate
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Abstract
The utility model discloses a kind of sanding devices, including：Casing；Motor is arranged in casing；Output shaft has output axis, by motor driving around output axis rotation；Eccentric element is detachably connected on output shaft, and eccentric element has the matching hole of the eccentric axis and receiving output shaft relative to output axis offset；Bottom plate bearing is arranged on eccentric element；Bottom plate is connected to by bottom plate bearing on eccentric element；Matching hole has along the axially extending mating length of output shaft, and mating length is more than 1.7 with matching hole diameter ratio.The sanding device can efficiently reduce the amplitude that bottom plate is swung up and down, and reduce complete machine vibrations.
Description
Technical field
The utility model is related to a kind of sanding device, more particularly to a kind of sanding device of low vibrations.
Background technology
It is eccentric rotational motion that sanding device, which usually relies on the eccentric element being connected on output shaft by convert rotational motion,
And then bottom plate and sanding tool is driven to realize frosted operation by bearing.The bias of output shaft and eccentric element under normal circumstances
Hole is connected by peg-in-hole assembly, and eccentric element can drive bottom plate to be smoothly flatly to transport in the vertical plane of output axis
It is dynamic, however due to inevitably producing error, eccentric bore dia can be bigger than output shaft diameter, causes eccentric axially bored line and output
Axis is not parallel, so that bottom plate and output axis out of plumb, bottom plate and entire sanding device inevitably vertical tremor,
Reduce the stability of sanding device and handling.Although can coordinate by the shoulder of output shaft and the end face of eccentric element,
The inclination of eccentric element is limited, but shoulder and the fit dimension of end face are small, it is inadequate to the inclined restriction effect of eccentric element.
Invention content
Based on this, it is necessary to provide a kind of bottom plate and swing up and down that amplitude is small, complete machine shakes small sanding device.
A kind of sanding device, including：Casing；Motor is arranged in casing；Output shaft has output axis, is driven by motor
It is dynamic to be rotated around output axis；Eccentric element is detachably connected on output shaft, and eccentric element has inclined relative to output axis
The matching hole of the eccentric axis and receiving output shaft of shifting；Bottom plate bearing is arranged on eccentric element；Bottom plate passes through bottom plate bearing
It is connected on eccentric element；Matching hole has along the axially extending mating length of output shaft, mating length and mating bore dia it
Than being more than 1.7.
Mating length and the range of matching hole diameter ratio are 1.7-2.2 in one of the embodiments,.
Mating length and the range of matching hole diameter ratio are 1.7-1.8 in one of the embodiments,.
Mating length and the range of matching hole diameter ratio are 1.8-1.9 in one of the embodiments,.
Mating length and the range of matching hole diameter ratio are 1.9-2.2 in one of the embodiments,.
Sanding device further includes the equalizing feature being arranged on eccentric element, equalizing feature in one of the embodiments,
Including the first equalizing feature and the second equalizing feature, the first equalizing feature and the second equalizing feature are separately positioned on bottom plate bearing
Upper and lower both sides.
The second equalizing feature is integrally formed with eccentric element in one of the embodiments,.
The first equalizing feature has the first cylinder and the first semicircular rings, the first semicircle in one of the embodiments,
The other side opposite with eccentric axis in output axis is arranged in shape ring.
The second equalizing feature has the second cylinder and the second semicircular rings, the first semicircle in one of the embodiments,
Shape ring and the second semicircular rings are arranged in the same side of output axis.
The second cylinder is integrally formed with eccentric element in one of the embodiments,.
Matching hole at least partly overlaps in the axial direction with the second cylinder in one of the embodiments,.
Position-limit mechanism is set between the first cylinder and eccentric element in one of the embodiments,.
Position-limit mechanism includes the flat part being arranged on eccentric element and setting in the first circle in one of the embodiments,
There is the flat hole for accommodating and flat part being coupled on cylinder.
Sanding device further includes the thermal component being arranged on output shaft, thermal component packet in one of the embodiments,
The fan for including fan shaft sleeve and being connected to by fan shaft sleeve on output shaft, fan shaft are set on the upside of eccentric element.
Compared with prior art, the utility model increases the mating length of eccentric element and output shaft, improves mating
The ratio of length and mating bore dia, efficiently reduces eccentric element with respect to the inclined angle of output shaft, reduce bottom plate with
The vibrations of entire sanding device not only increase the comfort of operator and manipulate and feel, and more extend sanding device uses the longevity
Life.
Description of the drawings
Above the purpose of this utility model, technical solution and the advantageous effect can realize this reality by following
With the detailed description of novel specific embodiment, describes in combination with attached drawing and clearly obtain.
Fig. 1 is the sectional view of sanding device；
Fig. 2 is the enlarged drawing of X section in Fig. 1；
Fig. 3 a are the installation diagram of output shaft and eccentric element when mating length is shorter；
Fig. 3 b are the installation diagram of output shaft and eccentric element when mating length is longer；
The positions Fig. 4 equalizing feature schematic diagram.
Specific implementation mode
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, below in conjunction with the accompanying drawings to this
The specific implementation mode of utility model is described in detail.Elaborate many details in order to abundant in the following description
Understand the utility model.But the utility model can be much to implement different from other modes described here, this field
Technical staff can be without prejudice to doing similar improvement in the case of the utility model connotation, therefore the utility model is not by described below
Specific embodiment limitation.
Refer to the attached drawing 1 and 2, sanding device 1 include casing 2, the motor 3 being arranged in casing 2, and output shaft 4 is mounted on horse
Up on 3, output axis 4 ' is driven around by motor 3 and is rotated.Eccentric element 5 is detachably connected on output shaft 4, by output shaft
4, which are driven around output axis 4 ', rotates, and eccentric element 5 has itself axis of symmetry, is defined as eccentric axis 5 ', eccentric axis 5 '
There is eccentric distance e relative to output axis 4 '.Eccentric element 5 has receiving output shaft 4 in the position being coupled with output shaft 4
Matching hole 52, matching hole 52 have along the axially extending mating length 522 of output shaft 4, are that output shaft 4 is transmitted to eccentric element 5
5 inclined region of movement and limitation eccentric element.
Bottom plate bearing 6 is arranged on eccentric element 5, and bottom plate 7 is connected on eccentric element 5 by bottom plate bearing 6.Frosted
When device 1 works, motor 3 drives output shaft 4 to rotate, and eccentric element 5 is eccentrically rotated around eccentric axis 5 ', and passes through bottom plate axis
The movement of 6 drive bottom plates 7 is held, to which bottom plate 7 can carry out frosted operation to workpiece.Thermal component 8 is additionally provided on output shaft 4,
Thermal component 8 includes fan shaft sleeve 82 and is connected to the fan 81 on output shaft 4 by fan shaft sleeve 82, and output shaft 4 drives wind
81 rotation of fan forms radiation air, can radiate to motor 3, bottom plate 7 etc., fan shaft sleeve 82 is arranged in the upper of eccentric element 5
Side.
Refer to the attached drawing 2,3 and 4, in connection relation, output shaft 4 by eccentric element 5 and bottom plate bearing 6 indirectly with bottom
Plate 7 connects, and the position relationship of eccentric element 5 and output shaft 4 can change the position relationship of bottom plate 7 and output shaft 4.Due to that can not keep away
The error exempted from, the diameter of matching hole 52 can be more than the diameter of output shaft 4, and in assembly and work, eccentric element 5 can tilt, eccentric
Axis 5 ' and output axis 4 ' are not parallel, and then cause bottom plate 7 that can swing up and down at work, eccentric axis 5 ' and output axis
4 ' angle is bigger, bottom plate 7 ' to swing up and down amplitude bigger.Although the shoulder 41 of output shaft 4 can be with bias member in assembly
The end face 51 of part 5 coordinates, but due to mating area very little, effect is not enough to limitation eccentric element 5 and tilts, it is difficult to improve bottom
The case where plate 7 is swung.
Although the diameter error of matching hole 52 is inevitable, bottom plate 7 can be effectively reduced by increasing mating length 522
The amplitude swung up and down.Attached drawing 2 and 3 is compared, in the case where the diameter of matching hole 52 and output shaft 4 is constant, length 522 is coupled
Difference, eccentric axis 5 ' and the angle of output axis 4 ' change significantly.In attached drawing 2, eccentric element 5 is matched with output shaft 4
Spreading degree is shorter, and the opposite output inclined angle of axis 4 ' of eccentric axis 5 ' is larger, and in fig. 3, eccentric element 5 and output
The diameter of axis 4 is constant, and mating length increases, and the opposite output inclined angle of axis 4 ' of eccentric axis 5 ' reduces.Its reason exists
In in the case where 52 diameter of matching hole is constant, mating length 522 increases, and the region that output shaft 4 limits eccentric element 5 increases
, have compressed the inclined spaces of eccentric element 5.So in the axial direction of output shaft 4, extends the length of matching hole 52, make mating
Length 522 and the ratio of 52 diameter of matching hole increase, and the amplitude swung up and down when bottom plate 7 can be allowed to work reduces, and improves frosted
The complete machine of device 1 shakes.When ratio is more than 1.7, the amplitude that bottom plate is swung is obviously reduced, since eccentric element 5 is located at fan
Between axle sleeve 82 and bottom plate 7,52 extended space of matching hole is limited, therefore by ratio range design between 1.7-2.2.
In one embodiment, mating length and the range of matching hole diameter ratio are 1.7-1.8, and ratio is in this range
When middle increase, the opposite output inclined angle of axis 4 ' of eccentric axis 5 ' can significantly reduce.
In one embodiment, mating length and the range of matching hole diameter ratio are 1.8-1.9, and ratio is in this range
When middle increase, the reduction amplitude at 4 ' angle of inclination of the opposite output axis of eccentric axis 5 ' is to slow down.
In one embodiment, mating length and the range of matching hole diameter ratio are 1.9-2.2, and ratio is in this range
When middle increase, the reduction amplitude at 4 ' angle of inclination of the opposite output axis of eccentric axis 5 ' very slowly, and can be approached gradually and one
A limiting value.
Since eccentric element 5 is between fan shaft sleeve 82 and bottom plate 7,52 extended space of matching hole is limited, and
And eccentric element 5 drives bottom plate 7 to do eccentric motion, and setting equalizing feature is also needed between fan shaft sleeve 82 and bottom plate 7 to tie up
Hold the dynamic balancing of sanding device 1.In the present embodiment, sanding device 1 includes the equalizing feature 9 being arranged on eccentric element 5, is put down
The component 9 that weighs includes the first equalizing feature 91 and the second equalizing feature 92, and the second equalizing feature is integrally formed with eccentric element.
There are first equalizing feature 91 first cylinder 911 and the first semicircular rings 912, the second equalizing feature 92 to have the
Two cylinders 921 and the second semicircular rings 922.Above-mentioned each cylinder is respectively used to the setting of each equalizing feature in eccentric member
On part 5, each semicircular rings have been respectively provided with the balance quality of balanced action.Eccentric element 5 drives bottom plate 7 to move, and generates
Centrifugal force cause output shaft 4 or even entire sanding device 1 to shake, so the first equalizing feature 91 is arranged on eccentric element 5,
First semicircle 912 rings are arranged in output axis 4 ' and the opposite other side of eccentric axis 5 ', are used for equilibrium centrifugation power；
And the first semicircular rings 912 will produce moment unbalance, therefore the second equalizing feature 92 is set again, by the second semicircular rings 922
It is arranged in the same side of the first semicircular rings 921, compensating torque is uneven.
First equalizing feature 91 is arranged in the upside of bottom plate bearing, and eccentric element 5 is connected to by the first cylinder 911
On, in the axial direction of eccentric element 5, the first cylinder 911 at least partly coordinates with eccentric element 5, and setting in this way can make defeated
Shaft 4 is not coupled with the first balance weight 91, increases the mating length of eccentric element 5 and output shaft 4.In the first cylinder 911
Position-limit mechanism 95 is set between eccentric element 5 so that eccentric element 5 can drive the first equalizing feature 91 to rotate jointly.Limit
Position mechanism 95, which has including the flat part 951 being arranged on eccentric element 5 and setting on the first cylinder 911, to be accommodated and is coupled
The flat hole 952 of flat part 951.First semicircular rings 912 are coaxially disposed and are integrally formed with the first cylinder 911.
Second equalizing feature 92 is arranged in the downside of bottom plate bearing 6, and the second semicircular rings 922 are coaxially integrally formed
On two cylinders 921, and the first semicircular rings 912 and the setting of the second semicircular rings 922 are in the same side of output axis 4 '.The
Two cylinders 921 are integrally formed with eccentric element 5, and being arranged can allow matching hole 52 to extend to the second cylinder 921 in this way, with the
Two cylinders have the region at least partly overlapped in the axial direction, increase the length of mating length 522.Due in position-limit mechanism 95
Under the action of, when eccentric element 5 rotates, the first semicircular rings 912 do not have relative motion with eccentric element 5, look up from axis,
The angular relationship of first semicircular rings 912 and the second semicircular rings 922 is to maintain constant, that is, maintains the first semicircular rings
912 and second semicircular rings 922 phase relation, allow sanding device that can keep dynamic balancing and equalising torque for a long time, improve
The service life of sanding device.
Each technical characteristic of above example can be combined arbitrarily, to keep description succinct, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield is all considered to be the range of this specification record.
Above example only expresses the several embodiments of the utility model, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to utility model patent range therefore be interpreted as.It should be pointed out that for the ordinary skill people of this field
For member, without departing from the concept of the premise utility, various modifications and improvements can be made, these belong to this reality
With novel protection domain.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (14)
1. a kind of sanding device, including：
Casing；
Motor is arranged in the casing；
Output shaft has output axis, is rotated around the output axis by motor driving；
Eccentric element is detachably connected on the output shaft, and the eccentric element has inclined relative to the output axis
The eccentric axis of shifting and the matching hole for accommodating the output shaft；
Bottom plate bearing is arranged on the eccentric element；
Bottom plate is connected to by the bottom plate bearing on the eccentric element；
It is characterized in that, the matching hole has along the axially extending mating length of the output shaft, the mating length and institute
It states matching hole diameter ratio and is not less than 1.7.
2. sanding device according to claim 1, which is characterized in that the mating length and the matching hole diameter ratio
Range be 1.7-2.2.
3. sanding device according to claim 2, which is characterized in that the mating length and the matching hole diameter ratio
Range be 1.7-1.8.
4. sanding device according to claim 2, which is characterized in that the mating length and the matching hole diameter ratio
Range be 1.8-1.9.
5. sanding device according to claim 2, which is characterized in that the mating length and the matching hole diameter ratio
Range be 1.9-2.2.
6. sanding device according to claim 1, which is characterized in that the sanding device further includes being arranged in the bias
Equalizing feature on element, the equalizing feature include the first equalizing feature and the second equalizing feature, first equalizing feature
The both sides up and down of the bottom plate bearing are separately positioned on the second equalizing feature.
7. sanding device according to claim 6, which is characterized in that second equalizing feature and the eccentric element one
It is body formed.
8. sanding device according to claim 6, which is characterized in that first equalizing feature have the first cylinder and
The other side opposite with the eccentric axis in the output axis is arranged in first semicircular rings, first semicircular rings.
9. sanding device according to claim 8, which is characterized in that second equalizing feature have the second cylinder and
Second semicircular rings, first semicircular rings and the second semicircular rings are arranged in the same side of the output axis.
10. sanding device according to claim 9, which is characterized in that second cylinder and the eccentric element one
It is body formed.
11. sanding device according to claim 10, which is characterized in that the matching hole is with second cylinder in axis
It at least partly overlaps upwards.
12. sanding device according to claim 8, which is characterized in that first cylinder and the eccentric element it
Between position-limit mechanism is set.
13. sanding device according to claim 12, which is characterized in that the position-limit mechanism includes being arranged in the bias
Flat part on element and it is arranged on first cylinder with the flat hole for accommodating and being coupled the flat part.
14. sanding device according to claim 1, which is characterized in that the sanding device further includes being arranged described defeated
Thermal component on shaft, the thermal component include fan shaft sleeve and are connected on the output shaft by the fan shaft sleeve
Fan, the fan shaft is set on the upside of the eccentric element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721534969.2U CN207841048U (en) | 2017-11-16 | 2017-11-16 | Sanding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721534969.2U CN207841048U (en) | 2017-11-16 | 2017-11-16 | Sanding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207841048U true CN207841048U (en) | 2018-09-11 |
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ID=63422440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721534969.2U Active CN207841048U (en) | 2017-11-16 | 2017-11-16 | Sanding device |
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| Country | Link |
|---|---|
| CN (1) | CN207841048U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022105741A1 (en) * | 2020-11-19 | 2022-05-27 | 南京泉峰科技有限公司 | Sanding machine |
-
2017
- 2017-11-16 CN CN201721534969.2U patent/CN207841048U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022105741A1 (en) * | 2020-11-19 | 2022-05-27 | 南京泉峰科技有限公司 | Sanding machine |
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