CN207027186U - A kind of centering type sander of safe operation - Google Patents
A kind of centering type sander of safe operation Download PDFInfo
- Publication number
- CN207027186U CN207027186U CN201720647400.0U CN201720647400U CN207027186U CN 207027186 U CN207027186 U CN 207027186U CN 201720647400 U CN201720647400 U CN 201720647400U CN 207027186 U CN207027186 U CN 207027186U
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- emery disc
- friction plate
- centering type
- safe operation
- type sander
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Abstract
The utility model discloses a kind of centering type sander of safe operation, belong to field of power tools, including casing, motor and emery disc, the motor is connected with eccentric shaft, the eccentric shaft is connected with bearing, and the bearing is arranged in bearing block, and the bearing block is fixedly connected with the emery disc, be provided with the casing to the emery disc produce frictional resistance friction plate, with reduce the emery disc with the rotating speed under working face released state to be processed.The utility model has the advantage of centering type sander is caused when not in contact with to working face to be processed, vibrations are smaller, while security is also more preferable.
Description
【Technical field】
A kind of centering type sander of safe operation is the utility model is related to, belongs to field of power tools.
【Background technology】
Centering type sander is the common tool polished the surface of workpiece, and circle sand machine is exactly one kind therein.With
Exemplified by circle sand machine, the polishing base plate of circle sand machine is circular emery disc, and circle sand machine generally includes motor, and motor drive connection has bias
Axle, the eccentric shaft are connected, the sand in the presence of bearing relative to motor shaft eccentric setting between eccentric shaft and emery disc by bearing
Disk can freely rotate relative to the axis of eccentric shaft, when motor rotates, make irregular track under eccentric shaft effect
Motion, for being ground larger amount of material.
Traditional circle sand machine, under the original state after electric motor starting, emery disc motor, eccentric shaft, bearing induced effect
Lower high-speed rotation, when polishing workpiece, after emery disc contacts with working face to be processed, by from working face to be processed
Frictional resistance, motor speed decline, and reach machine normal work rotating speed.Once it is raised when justifying sand machine, acts on the work of emery disc
Firmly disappear, motor, emery disc return to again to be rotated at a high speed, and emery disc is the high-speed rotary part being exposed on machine, easily right
Human body damages, and the high-speed rotation of emery disc is eccentric motion in fact, and its high-speed rotation can produce larger vibrations.
【Utility model content】
Technical problem to be solved in the utility model is overcome the deficiencies in the prior art and provides a kind of safe operation
Centering type sander so that for centering type sander when not in contact with to working face to be processed, vibrations are smaller, while security
More preferably.
Solves above-mentioned technical problem, the utility model adopts the following technical scheme that：
A kind of centering type sander of safe operation, including casing, motor and emery disc, the motor are connected with bias
Axle, the eccentric shaft are connected with bearing, and the bearing is arranged in bearing block, and the bearing block is fixed with the emery disc to be connected
Connect, be provided with the casing to the emery disc produce frictional resistance friction plate, with reduce the emery disc with work to be processed
Make the rotating speed under the released state of face.
Using the beneficial effects of the utility model：
The drive pattern of centering type sander and traditional electric tool driving it is different, conventional power tool be according to
Work head is directly driven to rotate by motor, and centering type sander is to carry out passing power by eccentric vibrating, its operation principle class
It is similar to rotate the principle of Ho La hoop, motor shaft rotates, and drives eccentric shaft turns, is synchronous axial system between motor shaft and eccentric shaft,
Eccentric shaft is eccentric motion when operating, and the eccentric motion can drive bearing block to rotate, and drives emery disc to rotate when bearing block rotates, and
It is synchronous axial system not to be between bearing block and eccentric shaft, still there is certain speed discrepancy.Original centering type sander, works as emery disc
When being not exposed to working face to be processed, although there is certain speed discrepancy between bearing block and eccentric shaft, speed discrepancy is smaller, institute
With the rotating speed of bearing block nearly close to motor shaft or the rotating speed of eccentric shaft, so that centering type sander with work to be processed
When making under the released state of face, the vibrations of machine, noise are all very big, and exposed emery disc is also easy to hurt user.
And in the utility model, install a friction plate for being used to produce emery disc frictional resistance additional on casing, work as sand
Disk can substantially be reduced the rotating speed of itself by after frictional resistance, so that centering type sander is not in contact with to work to be processed
When making face, the rotating speed of emery disc is reduced for original centering type sander, and vibrations, noise are also reduced therewith, is used
Life-span can increase, and certainly, the relatively low emery disc of rotating speed even touches user, and the injury to user is also smaller, and security is more preferable.
Moreover, a bit more crucial, after setting the friction plate, under machining state, will not also be produced to the rotating speed of emery disc
Raw to influence, emery disc, can be by the reaction force of working face to be processed, this reaction force after touching on working face to be processed
Can be delivered on bearing block, bearing block can be exerted a force on bearing, and bearing is typically to include inner ring and outer ring, when bearing by
The inner ring rotated relatively freely originally during to axial force and outer ring can be intended to synchronous axial system, and surely not Complete Synchronization rotates,
In this process, increasing equivalent to the synchronism between bearing block and eccentric shaft, that is to say, that the rotating speed of bearing block can become
To in synchronous with eccentric shaft, the rotating speed equivalent to bearing block can increase, and the rotating speed of bearing block improves, and also implies that emery disc
Rotating speed improves, when the active force between emery disc and working face to be processed is gradually increased, between this bearing block and eccentric shaft
The incremental speed for tending to synchronously be formed can be more than the rotating speed that friction plate is formed to emery disc and be reduced, for synthesis, when emery disc touches
After working face to be processed, relative to not in contact with when, the rotating speed of emery disc can improve.Material is thus formed not in contact with work to be processed
In the state of face, emery disc rotating speed is low, and after touching working face to be processed, the effect that emery disc rotating speed can improve on the contrary.
Preferably, the emery disc includes operative end surface and positioned at the resistance end face of operative end surface opposition side, it is described to rub
Pad is in contact with the resistance end face.
Preferably, the friction plate is fixedly mounted on casing, friction plate includes elastic deformation piece, and the elasticity becomes
Shape piece and the resistance end contact；Or, the friction plate floating mount is provided with casing between the friction plate and casing
Elastic component.
Preferably, the friction plate is annular element, annular element includes ring body, becomes when the friction plate includes elasticity
During shape piece, the ring body is provided at circumferentially spaced the elastic deformation piece of more than 2.
Preferably, the friction plate is provided with heat emission hole.
Preferably, the eccentric block of increase balance is connected with the eccentric shaft.
Preferably, the bearing includes inner ring and outer ring, the inner ring is socketed on the eccentric shaft, the outer ring peace
In bearing block；Or, the bearing includes inner ring and outer ring, the outer ring and eccentric axis connection, the inner ring and bearing block
Connection.
Preferably, the emery disc includes emery disc body and the sand paper being arranged on emery disc body, the emery disc body bag
Include soft layer.
Preferably, the emery disc body also includes the wearing layer being arranged on soft layer, the wearing layer rubs with described
Pad is in contact.
Preferably, the soft layer is rubber layer；Or the soft layer includes spongy layer and coated on spongy layer
Supporting layer.
Other features and advantage of the present utility model will be detailed in following embodiment, accompanying drawing exposure.
【Brief description of the drawings】
The utility model is described further below in conjunction with the accompanying drawings：
Fig. 1 is the complete machine schematic diagram of the utility model centering type sander embodiment one；
Fig. 2 is local interior's schematic diagram of the utility model centering type sander embodiment one；
Fig. 3 is the assembling schematic diagram of the utility model centering type sander embodiment one；
Fig. 4 is the partial schematic sectional view in the utility model centering type sander embodiment one；
Fig. 5 is the structural representation of friction plate in the utility model centering type sander embodiment one；
Fig. 6 is the structural representation of eccentric block in the utility model centering type sander embodiment one；
Fig. 7 is the internal structure schematic diagram of emery disc in the utility model centering type sander embodiment one.
【Embodiment】
The technical scheme of the utility model embodiment is explained with reference to the accompanying drawing of the utility model embodiment and
Illustrate, but following embodiments are only preferred embodiment of the present utility model, and it is not all.Based on the embodiment in embodiment,
Those skilled in the art obtain other embodiment on the premise of creative work is not made, and belong to of the present utility model
Protection domain.
In the following description, occur the indicating position such as term " interior ", " outer ", " on ", " under ", "left", "right" or
Position relationship is to be described based on orientation shown in the drawings or position relationship, description embodiment merely for convenience with simplified, and
It is not instruction or implies signified device or element there must be specific orientation, with specific azimuth configuration and operation, because
This is it is not intended that to limitation of the present utility model.
Embodiment 1：
As shown in Figures 1 to 6, a kind of centering type sander of the present embodiment displaying, specifically a kind of round sand machine, bag
Casing 1 is included, is provided with motor 2 in casing 1, motor 2 is provided with motor shaft 21, and motor shaft 21 is connected with fan 22, and the motor 2 is driven
It is connected with eccentric shaft 31, not on the same line, the eccentric shaft 31 is driven for the axis of eccentric shaft 31 and the axis of motor shaft 21
Bearing 32 is connected with, bearing 32 includes inner ring and outer ring, and inner ring is socketed on eccentric shaft 31, and is held with a pad 34, described
The outer ring of bearing 32 is arranged in bearing block 33, and the bearing block 33 is fixedly connected by trip bolt with emery disc 4, the transmission of this set
Mechanism has generally used in traditional circle sand machine, has been well known structure in circle sand machine field, has not illustrated excessively,
Improvement in the present embodiment is to be provided with the friction plate 5 that frictional resistance is produced to the emery disc 4 on the casing 1, with drop
The low emery disc 4 with the rotating speed under working face released state to be processed.
The drive pattern of circle sand machine and the driving of traditional electric tool are different, and conventional power tool is to rely on motor
Directly work head is driven to rotate, and it is to carry out passing power by eccentric vibrating to justify sand machine, i.e., that sets of transmission mechanism listed above,
Its operation principle is similar to the principle for rotating Ho La hoop, and motor shaft 21 rotates, and drives eccentric shaft 31 to rotate, motor shaft 21 and bias
It is synchronous axial system between axle 31, eccentric shaft 31 is eccentric motion when operating, and the eccentric motion can drive bearing block 33 to rotate, bearing
Emery disc 4 is driven to rotate when seat 33 rotates, and it is synchronous axial system not to be between bearing block 33 and eccentric shaft 31, still there is certain rotating speed
Difference.Original round sand machine, when emery disc 4 is not exposed to working face to be processed, although having between bearing block 33 and eccentric shaft 31
Certain speed discrepancy, but speed discrepancy is smaller, so the rotating speed of bearing block 33 is nearly close to motor shaft 21 or eccentric shaft 31
Rotating speed, so that for circle sand machine when with working face released state to be processed, the vibrations of machine, noise are all very big, and outside
The emery disc 4 of dew is also easy to hurt user.
And in the present embodiment, install a friction plate 5 for being used to produce emery disc 4 frictional resistance additional on casing 1, work as sand
Disk 4 can substantially be reduced the rotating speed of itself by after frictional resistance, so that circle sand machine is not in contact with to working face to be processed
When, the rotating speed of emery disc 4 is reduced for traditional circle sand machine, and vibrations, noise are also reduced therewith, and service life can increase
Add, certainly, the relatively low emery disc 4 of rotating speed even touches user, and the injury to user is also smaller, and security is more preferable.
Moreover, a bit more crucial,, also will not be to the rotating speed of emery disc 4 under machining state after the friction plate 5 is set
Have an impact, reason is as follows：Emery disc 4 after touching on working face to be processed, can by the reaction force of working face to be processed,
This reaction force can be delivered on bearing block 33, and bearing block 33 can be exerted a force on bearing 32, when bearing 32 is by axial direction
The inner ring rotated relatively freely originally during power and outer ring can be intended to synchronous axial system, and surely not Complete Synchronization rotates, at this
During, increasing equivalent to the synchronism between bearing block 33 and eccentric shaft 31, that is to say, that the rotating speed of bearing block 33 can become
To in synchronous with eccentric shaft 31, the rotating speed equivalent to bearing block 33 can increase, and the rotating speed of bearing block 33 improves, and also implies that
The rotating speed of emery disc 4 improves, when the active force between emery disc 4 and working face to be processed is gradually increased, this bearing block 33 with
The incremental speed for tending to synchronously be formed between eccentric shaft 31 can be more than the rotating speed decrement that friction plate 5 is formed to emery disc 4, comprehensive next
Say, after emery disc 4 touches working face to be processed, relative to not in contact with when, the rotating speed of emery disc 4 can improve.Material is thus formed
In the state of not in contact with working face to be processed, the rotating speed of emery disc 4 is low, and after touching working face to be processed, the rotating speed of emery disc 4 is on the contrary
The effect that can increase.
It should be noted that the circle sand machine in the present embodiment is only one of which in centering type sander, other types
Centering type sander as use the present embodiment in structure, also fall into the scope of protection of the utility model.
Concrete structure：
By taking Fig. 1 to Fig. 4 reference as an example, the emery disc 4 includes operative end surface and resistance end face, and operative end surface is emery disc 4
Bottom surface, and resistance end face is the top surface of emery disc 4, and friction plate 5 is mounted in the bottom of casing 1, i.e., positioned at resistance end face one
Side, and the friction plate 5 is in contact with the resistance end face all the time.
Friction plate 5 in the present embodiment is annular element, is so that whole circle contacts with emery disc 4, frictional force is more uniform, friction
Piece 5 includes ring body 51, and ring body 51 is provided with card convex 511, and casing 1 is provided with the neck matched with card convex 511, installation
When will allow ring body 51 that certain deformation occurs after, card convex 511 is caught in neck, install very convenient, card convex 511
Shape it is T-shaped.Ring body 51 is circumferentially also provided with multiple heat emission holes 52 simultaneously, when friction plate 5 and emery disc 4 produce friction
During resistance, certain heat can be produced, can be under the drive of fan 22, by heat from heat emission hole 52 after heat emission hole 52 is set
Discharge, while heat emission hole 52, there is another effect, can aid in ring body 51 and deform upon, will be rubbed with facilitating
Piece 5 is installed on casing 1.
After emery disc 4 touches working face to be processed, emery disc 4 have it is micro move up, in order to allow friction plate 5 and emery disc 4 it
Between frictional force will not increase because of micro move up, friction plate 5 is improved in the present embodiment, friction plate 5 includes bullet
Property deformation piece 53, the elastic deformation piece 53 is arranged on the bottom of ring body 51, and elastic deformation piece 53 has polylith in the present embodiment,
It is provided at circumferentially spaced in the bottom of ring body 51, when micro move up occurs for emery disc 4, elastic deformation piece 53 can deform upon, from
And the frictional force allowed between elastic deformation piece 53 and emery disc 4 is before micro move up occurs almost with being consistent, i.e., friction plate 5 with
Frictional force between emery disc 4 is to maintain certain substantially.
Certainly, in order to allow the frictional force between friction plate 5 and emery disc 4 to be consistent, other embodiment can also be used,
For example 5 overall floating mount of friction plate is specifically described in detail in example 2 on casing 1.
In addition, as shown in fig. 6, be connected with eccentric shaft 31 described in the present embodiment increase balance eccentric block 35, should
Eccentric block 35 is used to eliminate uneven and caused vibrations so that machine vibrations in running are smaller, and noise is also smaller.
As shown in fig. 7, also being improved emery disc 4 in the present embodiment, specifically, the emery disc 4 includes emery disc sheet
Body and the sand paper (sand paper is not shown in the figure 7) being arranged on emery disc body, the emery disc body include soft layer, set soft
After layer, the quality of of emery disc 4 itself is mitigated, and soft layer can use rubber layer, spongy layer 43 etc., because spongy layer 43 is easy
Breakage, therefore if when soft layer uses spongy layer 43, preferably sets a supporting layer 42 on spongy layer 43, and supporting layer 42 can be with
It is the structure using spongy layer 43 shown in Fig. 7 for modeling layer, epoxy resin layer etc..
In addition, the emery disc body also includes the wearing layer 41 being arranged on soft layer, the top surface of wearing layer 41 is formed
Described resistance end face, the wearing layer 41 are in contact with the friction plate 5, and wearing layer 41 can use metal or other are wear-resisting
Material is made.
The bottommost of soft layer is preferably provided with thread gluing layer 44, and thread gluing layer 44 can be used for being bonded sand paper, but if sand
Paper carries self-adhesive, and thread gluing layer 44 can omit.
Using the emery disc 4 of this structure, total quality first is lighter, and secondly in whole emery disc 4, the more expensive part of cost is only
The part of wearing layer 41, other parts be all cost than relatively low, therefore the cost of whole emery disc 4 is controlled well.
Embodiment 2
The present embodiment and the difference of embodiment 1 are that friction plate is not fixedly mounted on casing, but floating mount exists
On casing, specifically, the cavity to be fluctuated for friction plate is set on casing, a friction plate part is installed in cavity
In, friction plate another part exposes outside cavity, sets elastic component between friction plate and casing in addition, and elastic component is preferably spring,
When emery disc is by active force micro floating upwards, elastic component can produce micro retraction, so as to allow between friction plate and emery disc
Frictional force keeps being basically unchanged.
Embodiment 3
The present embodiment and the difference of embodiment 1 are, in the present embodiment, the outer ring of bearing and eccentric axis connection are that is, eccentric
Bearing groove is set on axle, and the inner ring of bearing is then connected with bearing block, such structure can also realize technology of the present utility model
Effect.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, it is familiar with the those skilled in the art and should be understood that the utility model includes but is not limited to accompanying drawing and above specific embodiment party
Content described in formula.Any modification without departing from function and structure principle of the present utility model is intended to be included in claims
Scope in.
Claims (10)
1. a kind of centering type sander of safe operation, including casing, motor and emery disc, the motor are connected with bias
Axle, the eccentric shaft are connected with bearing, and the bearing is arranged in bearing block, and the bearing block is fixed with the emery disc to be connected
Connect, it is characterised in that the friction plate that frictional resistance is produced to the emery disc is installed on the casing, existed with reducing the emery disc
With the rotating speed under working face released state to be processed.
2. the centering type sander of safe operation as claimed in claim 1, it is characterised in that the emery disc includes operative end surface
It is in contact with positioned at the resistance end face of operative end surface opposition side, the friction plate with the resistance end face.
3. the centering type sander of safe operation as claimed in claim 2, it is characterised in that the friction plate is fixedly mounted on
On casing, friction plate includes elastic deformation piece, the elastic deformation piece and the resistance end contact；Or, the friction plate floats
It is dynamic to be arranged on casing, elastic component is provided between the friction plate and casing.
4. the centering type sander of safe operation as claimed in claim 3, it is characterised in that the friction plate is annular element,
Annular element includes ring body, and when the friction plate includes elastic deformation piece, the ring body has been provided at circumferentially spaced 2
The elastic deformation piece above.
5. the centering type sander of safe operation as claimed in claim 3, it is characterised in that the friction plate is provided with radiating
Hole.
6. the centering type sander of safe operation as claimed in claim 1, it is characterised in that increasing is connected with the eccentric shaft
Add the eccentric block of balance.
7. the centering type sander of the safe operation as described in one of claim 1 to 6, it is characterised in that the bearing includes
Inner ring and outer ring, the inner ring are socketed on the eccentric shaft, and the outer ring is arranged in bearing block；Or, the bearing includes
Inner ring and outer ring, the outer ring and eccentric axis connection, the inner ring are connected with bearing block.
8. the centering type sander of the safe operation as described in one of claim 1 to 6, it is characterised in that the emery disc includes
Emery disc body and the sand paper being arranged on emery disc body, the emery disc body include soft layer.
9. the centering type sander of safe operation as claimed in claim 8, it is characterised in that the emery disc body also includes setting
The wearing layer on soft layer is put, the wearing layer is in contact with the friction plate.
10. the centering type sander of safe operation as claimed in claim 8, it is characterised in that the soft layer is rubber layer；
Or the soft layer includes spongy layer and coated in the supporting layer on spongy layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720647400.0U CN207027186U (en) | 2017-06-06 | 2017-06-06 | A kind of centering type sander of safe operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720647400.0U CN207027186U (en) | 2017-06-06 | 2017-06-06 | A kind of centering type sander of safe operation |
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| Publication Number | Publication Date |
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| CN207027186U true CN207027186U (en) | 2018-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720647400.0U Active CN207027186U (en) | 2017-06-06 | 2017-06-06 | A kind of centering type sander of safe operation |
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| CN (1) | CN207027186U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225477A (en) * | 2017-06-06 | 2017-10-03 | 浙江亚特电器有限公司 | A kind of circle sand machine using safety |
-
2017
- 2017-06-06 CN CN201720647400.0U patent/CN207027186U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225477A (en) * | 2017-06-06 | 2017-10-03 | 浙江亚特电器有限公司 | A kind of circle sand machine using safety |
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Address after: No. 150 Wenlong Road, Yuxin Town, Nanhu District, Jiaxing City, Zhejiang Province Patentee after: Zhejiang Yate Electric Appliance Co.,Ltd. Address before: 314100 No. 150 Wenlong Road, Yuxin Town, Nanhu District, Jiaxing City, Zhejiang Province Patentee before: ZHEJIANG YAT ELECTRICAL APPLIANCE Co.,Ltd. |