CN103068522B - There is the portable corner grinding machine of the guard shield of improvement - Google Patents
There is the portable corner grinding machine of the guard shield of improvement Download PDFInfo
- Publication number
- CN103068522B CN103068522B CN201080068543.7A CN201080068543A CN103068522B CN 103068522 B CN103068522 B CN 103068522B CN 201080068543 A CN201080068543 A CN 201080068543A CN 103068522 B CN103068522 B CN 103068522B
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- clamp screws
- screw
- grinding machine
- guard shield
- nut
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- 238000003466 welding Methods 0.000 claims description 9
- 238000002788 crimping Methods 0.000 claims description 3
- 210000000282 Nails Anatomy 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 10
- 238000005452 bending Methods 0.000 description 6
- 210000000515 Tooth Anatomy 0.000 description 3
- 210000002683 Foot Anatomy 0.000 description 1
- 210000001215 Vagina Anatomy 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000002093 peripheral Effects 0.000 description 1
Abstract
A kind of portable corner grinding machine includes: housing；Carrying flange part, it is attached to housing；And guard shield, it is arranged on carrying flange part.Described guard shield includes: cover body；Open-type clamped flanges, it is fixed on cover body and has relative to each other two fastening lug；Clamp screws and the assembly of nut, be used for fastening said two fastening lug, make them close to each other and between leave space；And screw holder, it is used for preventing clamp screws from coming off from clamped flanges.Described screw holder is attached to clamp screws or is formed by clamp screws.
Description
Technical field
The present invention relates to the portable corner grinding machine of a kind of guard shield with improvement.
Background technology
The angle grinding machine with guard shield or cover cap is well-known.Guard shield protection just operation angle grinding machine operator not by
The chip of workpiece is injured.Guard shield is installed on the housing of portable corner grinding machine adjustably by clamped flanges, described clamping
Flange is clamped on the carrying flange part being formed at or be installed on housing.Clamped flanges has and is fastened on one by clamp screws
Two the fastening lugs risen.After unclamping clamp screws, adjustable guard shield is relative to the Angle Position of housing.
In above-mentioned known portable corner grinding machine, when operation or adjustment angle grinding machine, clamp screws is easily twisted from guard shield
Open.The screw turned on may be lost, and operate the angle grinding machine with loosening guard shield and operator can be produced excessive risk.
For this problem, WO2009121432A1 discloses one to be had for preventing clamp screws from twisting from clamped flanges
The manual machine tool of the device that exoneration falls.Although the structure being disclosed in 2009121432A1 can keep clamp screws effectively
It is screwed on clamped flanges, but they are complicated.Such as, wherein most amendments relating to clamped flanges itself.
Therefore, it is desirable to the clamp screws for portable corner grinding machine provides a kind of simple maintaining body.
Summary of the invention
In view of problem present in prior art, it is an object of the invention to provide one and have and simply and effectively protect
The portable corner grinding machine of cover.
For reaching this purpose, on the one hand, the invention provides a kind of portable corner grinding machine, including:
Housing,
Carrying flange part, it is attached to housing, and
Guard shield, its be arranged on carrying flange part on,
Wherein, described guard shield includes: cover body；Open-type clamped flanges, it is fixed on cover body and has relative to each other
Two fastening lugs；Clamp screws and the assembly of nut, be used for fastening said two fastening lug, make them close to each other and it
Between leave space；And screw holder, it is used for preventing clamp screws from coming off from clamped flanges,
Wherein, described screw holder is attached to clamp screws or is formed by clamp screws.
A preferred embodiment according to the present invention, by relative to nut screwing clamping or unclamp clamp screws, guard shield divides
Jin Ru not allow operate the tight condition of portable corner grinding machine and allow the adjustment shape adjusting guard shield relative to the Angle Position of housing
State.
According to another preferred embodiment of the present invention, the said two fastening that nut is permanently attached to clamped flanges is convex
On in sheet one.
According to another preferred embodiment of the present invention, described screw holder is by least one groove and keeps back-up ring structure
Becoming, in the outer surface of the screw rod that at least one groove described is formed at clamp screws, described holding back-up ring is at clamp screws and nut
Assembled state under fasten the space internal gearing between lug in described groove in the said two of clamped flanges.
According to another preferred embodiment of the present invention, described screw holder is made up of hole and split pin, described hole
Diametrically being formed through the screw rod of clamp screws, described split pin is convex in clamping under the assembled state of clamp screws and nut
Through described hole in space between the said two fastening lug of edge.In this case, it has been through institute in split pin
After stating hole, at least one bared end of split pin can bend backward, in order to split pin is locked in clamp screws.
According to another preferred embodiment of the present invention, described screw holder is made up of back-up ring, and described back-up ring is at folder
It is fixed on the screw rod of clamp screws at certain position in holding the space between the said two fastening lug of flange.In this feelings
Under condition, described back-up ring can be permanently attached on screw rod by spot welding.
According to another preferred embodiment of the present invention, described screw holder is made up of screwed hole, described screwed hole
Fasten of the head of screw of close clamp screws in lug by said two and formed.The screw rod of clamp screws has close
The non-threaded section of the head of screw of clamp screws and the thread segment of the end near clamp screws, described non-threaded section can be at screwed hole
Middle slip, and described thread segment can form screw-threaded engagement with screwed hole.In this case, the non-threaded of the screw rod of clamp screws
The longitudinal size of section and thread segment can be set to: makes screwed hole and nut simultaneously can not produce screw-threaded engagement with thread segment.
According to another preferred embodiment of the present invention, described screw holder is by the increasing of the screw rod of clamp screws
End is constituted, and the end of described increasing is formed after clamp screws has been screwed into nut, and described end exposes from nut.?
In this case, the screw rod of described clamp screws is long enough to make end and the nut of the described increasing when the tight condition of guard shield
Between leave space.In this condition, the end of described increasing also can be formed by crimping or spot welding.
On the other hand, the invention provides a kind of portable corner grinding machine, including:
Housing,
Carrying flange part, it is attached to housing, and
Guard shield, its be arranged on carrying flange part on,
Wherein, described guard shield includes: cover body；Open-type clamped flanges, it is fixed on cover body and has relative to each other
Two fastening lugs；Clamp screws and the assembly of nut, be used for fastening said two fastening lug, make them close to each other and it
Between leave space；And screw holder, it is used for preventing clamp screws from coming off from clamped flanges,
Wherein, described screw holder is made up of bending plate, after clamp screws engages with nut, and described bending
Plate is welded on clamped flanges after the head of screw of clamp screws.
A preferred embodiment according to the present invention, a part for bending plate radially project to from clamped flanges towards
The part of the head of screw of clamp screws but do not hinder the position that head of screw operates.
According to aforementioned aspect of the present invention, the guard shield of portable corner grinding machine has screw holder, and described screw keeps
Device is attached to clamp screws or is formed by clamp screws, or is formed adjacent on the clamped flanges of clamp screws.Therefore, can obtain
Obtain simple and compact screw and keep structure.Clamp screws is effectively prevented to come off from clamped flanges, and is easily assembled to and adjusts
The guard shield of whole portable corner grinding machine.
Accompanying drawing explanation
Below, the detailed description made by reading reference accompanying drawing is further appreciated by the present invention, in the accompanying drawings:
Fig. 1 is the plane signal of a part for the portable corner grinding machine illustrating a preferred embodiment according to the present invention
Figure；
Fig. 2 is the floor map of the guard shield of the portable corner grinding machine illustrating Fig. 1；
Fig. 3 is the perspective diagram of the carrying flange part of the portable corner grinding machine illustrating Fig. 1；
Fig. 4 is the schematic diagram of the screw holder illustrating a preferred embodiment according to the present invention；
Fig. 5 is the schematic diagram of the screw holder of the Fig. 4 in being shown with；
Fig. 6 is the schematic diagram of the screw holder illustrating another preferred embodiment according to the present invention；
Fig. 7 is the schematic diagram of the screw holder of the Fig. 6 in being shown with；
Fig. 8 is the schematic diagram of the screw holder illustrating the another preferred embodiment according to the present invention；
Fig. 9 and Figure 10 is the schematic diagram of the screw holder illustrating the another preferred embodiment according to the present invention；
Figure 11 is the schematic diagram of the screw holder illustrating the another preferred embodiment according to the present invention；
Figure 12 is the schematic diagram of the screw holder of the Figure 11 in being shown with；And
Figure 13 is the schematic diagram of the screw holder illustrating the another preferred embodiment according to the present invention.
Detailed description of the invention
Now, the portable corner grinding machine of a preferred embodiment that will describe with reference to Fig. 1-3 according to the present invention.
As it is shown in figure 1, portable corner grinding machine includes: housing 100；Rotary shaft 200, it is arranged on housing；Emery wheel (does not shows
Go out), it can be mounted on the rotary shaft；Carrying flange part 300, it is fixably attached to or is overall shaped on housing；And
Guard shield 400, it is adjustably mounted on carrying flange part.
As in figure 2 it is shown, guard shield 400 includes: cover body or cover cap 7；Open-type clamped flanges 2, it is fixed on cover body 7 and has
Relative to each other two are had to fasten lug 4 and 5；And clamp screws 3 and clamping nut 6, it is used for fastening said two fastening convex
Sheet 4 and 5, make them close to each other and between leave space.
Said two fastening lug 4 and 5 radially highlights from the main body of clamped flanges 2, and is respectively provided with held
The through hole that screw 3 passes.
Clamping nut 6 be preferably permanently fixed in the said two fastening lug 4 and 5 of clamped flanges 2 one upper (
In the embodiment illustrated, it is permanently attached on the fastening lug 5 of the right hand).
Cover body 7 is semicircle dish type, has the centre bore defining inner periphery.Multiple protuberances 71 are formed at cover body 7
In inner periphery.Clamped flanges 2 is fixed on, is such as welded on the rear side of cover body 7 along the inner periphery of cover body 7.Clamped flanges 2 have to
Few internal tooth 8(Fig. 2 shows three).
As it is shown on figure 3, carrying flange part 300 has the ledge 310 prominent along the direction of rotary shaft 200.Show at Fig. 3
In the embodiment gone out, ledge 310 is formed has same external diameter or the two-layer of different overall diameter, i.e. the upper and lower.Prominent
Go out part 310 and form multiple recess along the direction of the central axis being parallel to rotary shaft 200 in its external peripheral surface.On upper strata
Recess in neighboring includes wide recess 9a and narrow recess 9b, and the recess in lower floor neighboring only includes narrow recess.It addition,
Circumferential recess 9c is formed between upper and lower layer.But, the structure of ledge 310 is not limited to this, only one layer or more than two-layer also
It is applicable.
When clamped flanges 2 is arranged on carrying flange part 300 at fixed position, along with one or more internal tooths 8 are worn
The wide recess 9a being formed in neighboring, upper strata and the entrance of crossing correspondence are formed at circumferential recess 9c between upper and lower layer, cover
The inner periphery of body 7 is arranged in around the described two-layer of ledge 310.
Then, clamp screws 3 is through the through hole of said two fastening lug 4 and 5, and is screwed in clamping nut 6.Logical
Crossing and tighten clamp screws 3, the internal tooth 8 of clamped flanges 2 is engaged in ledge 310 upper and lower being formed at carrying flange part 300
In recess 9c between Ceng, and the protuberance 71 being formed in the inner periphery of cover body 7 is engaged in and is formed at the two of ledge 310
In recess in the neighboring of layer.So, guard shield 400 is set relative to the Angle Position of housing 100.By by clamped flanges 2
Protuberance 71 neighboring that is engaged in the two-layer being formed at ledge different recesses in, the Angle Position of guard shield 400 is adjusted
Whole.
Conventionally, clamp screws 3 is the standard screws with Full threaded rod.In operation angle grinding machine or the position, angle of adjustment guard shield
When putting, clamp screws is easily turned on from guard shield and is come off.
According to the present invention, it is provided that screw holder is used for preventing clamp screws 3 from coming off from clamped flanges 2.
As shown in Figure 4 and Figure 5, according to a preferred embodiment of the present invention, screw holder is by groove 12 and screw
Keeping back-up ring 10 to constitute, in the outer surface of the screw rod that described groove 12 is formed at clamp screws 3, described screw keeps back-up ring 10 to be used for
It is engaged in groove 12.Clamp screws 3 can be full thread or partial threads.Keep back-up ring 10 can be standard (such as,
DIN6799) opening of elastically deformable keeps back-up ring.
Under the assembled state that figure 5 illustrates, clamp screws 3 be anchored on clamping nut 6, and screw keep back-up ring 10 by
It is engaged with the groove 12 of clamp screws 3 in elastic deformation.Keep back-up ring 10 can be always maintained at clamp screws and be attached in clamped flanges 2
On.
The position keeping back-up ring 10 to connect with the left hand fastening lug 4 of clamped flanges 2 defines for transporting angle grinding machine
Shipping situation, is also that the surrounding rotating shroud being placed on by guard shield and carrying flange part is to carry out the adjustment state of position adjustment.As
Really size allow, even if under the shipping situation of guard shield clamp screws 3 be not fully screwed into clamping nut 6 in time, in clamp screws 3
And the most always there is pretightning force between clamping nut 6.
The present embodiment has another advantage, i.e. be easily changed clamp screws 3.
As shown in Figure 6 and Figure 7, according to another preferred embodiment of the present invention, screw holder is by hole 21 and opening
Pin 22 is constituted, and described hole 21 is diametrically formed through the screw rod of clamp screws 3.After clamp screws 3 is anchored on nut 6,
Split pin 22 fastens in the hole 21 lug 4 and 5 through the said two being positioned at clamped flanges 2.Then, split pin 22 is revealed
Two foots going out end bend, as shown in Figure 7 backward, in order to split pin 22 is locked in clamp screws 3.Split pin 22 can be always maintained at
Clamp screws is attached on clamped flanges 2.
In the present embodiment, clamp screws 3 can be full thread or partial threads.
Split pin 22 can be standard (such as, ISO1234/DIN94) split pin.
The present embodiment also has the advantage being easily changed clamp screws.
As shown in Figure 8, according to the another preferred embodiment of the present invention, screw holder is made up of back-up ring 31, described
The back-up ring 31 position between the said two fastening lug 4 and 5 of clamped flanges 2 is fixed on the screw rod of clamp screws 3.
Back-up ring 31 can be fixed on the screw rod of clamp screws 3 by any mode as known in the art, such as, by such as figure
The spot welding represented by reference 32 in 8.Preferably, use 3 spot welding or 4 spot welding herein.
The back-up ring 31 of welding can prevent clamp screws from coming off from clamped flanges 2.
The shortcoming of the present embodiment is, it has not been convenient to implements welding in the narrowest space, and is difficult to change clamp screws.
As shown in Figure 9 and Figure 10, according to the another preferred embodiment of the present invention, screw holder is by bending plate 41 structure
Become, after clamp screws 3 has been anchored on nut 6, described bending plate 41 is fixed on after the head of screw of clamp screws 3,
Such as it is welded on clamped flanges 2.
Bending plate 41 has part 42, and described part 42 radially projects to the spiral shell towards clamp screws 3 from clamped flanges 2
The part of ailhead but do not hinder the position that head of screw operates.Part 42 can prevent clamp screws from taking off from clamped flanges 2 backward
Fall.
The present embodiment has the drawback that, it is difficult to change clamp screws.As is illustrated by figs. 11 and 12, according to the present invention again
One preferred embodiment, screw holder is made up of following: near clamp screws 3 in said two fastening lug 4 and 5
One of head of screw (in the embodiment shown in Figure 11 and Figure 12, the fastening lug 4 of left hand) forms through hole, as screwed hole
53.The internal diameter of screwed hole 53 is equal to the internal diameter of clamping nut 6.Clamp screws 3 is partial threads.It is to say, clamp screws 3
Screw rod have close clamp screws head of screw non-threaded section 52 and near the thread segment 51 of end of clamp screws.Without spiral shell
The external diameter of stricture of vagina section 52 is less than the bottom diameter (at the path that the bottom of screw thread records) on thread segment 51.When assembling, thread segment
51 are fully threaded through screwed hole 53.Then, non-threaded section 52 can be slided in screwed hole 53, but whole clamp screws
3 can not come off from clamped flanges 2 voluntarily.This state can be described as the transport/adjustment state of guard shield.Then, thread segment 51 fastens
In nut 6, thus guard shield enters its tight condition.
In the present embodiment, the longitudinal size of the sections of the screw rod of clamp screws is decided to be: make screwed hole 53 and nut 6 not
Simultaneously can produce screw-threaded engagement with thread segment 51.Otherwise, guard shield can not be tightened.
In the present embodiment, it is possible to easily change clamp screws 3.
As shown in figure 13, according to the another preferred embodiment of the present invention, screw holder is by formed below: in clamping
After screw 3 has been screwed into nut 6 and end 61 exposes from nut 6, strengthen the end 61 of the screw rod of clamp screws 3.End
The increasing of 61 can be by any mode as known in the art, such as by by end crimping or next real by spot welding on end
Execute.
The end 61 strengthened can prevent whole clamp screws from coming off from nut.The screw rod of clamp screws should be long enough to make
Space is left between the end 61 and the nut 6 that strengthen when the tight condition of guard shield.This sky for adjusting the Angle Position of guard shield
Gap is necessary.
Although it have been described that some embodiment, but these embodiments are only used as example and provide, and are therefore not limiting as
The scope of the present invention.Appended claims and their equivalent are intended to encompass and are considered within the scope and spirit of the invention
All modifications, replace and change.
Claims (7)
1. a portable corner grinding machine, including:
Housing,
Carrying flange part, it is attached to housing, and
Guard shield, its be arranged on carrying flange part on,
Wherein, described guard shield includes: cover body；Open-type clamped flanges, it is fixed on cover body and has relative to each other two
Fastening lug；Clamp screws and the assembly of nut, be used for fastening said two fastening lug, make them close to each other and between stay
There is space；And screw holder, it is used for preventing clamp screws from coming off from clamped flanges,
Wherein, described screw holder is made up of screwed hole, and described screwed hole is by close folder in said two fastening lug
Hold of head of screw of screw and formed,
Wherein, the screw rod of clamp screws have close clamp screws head of screw non-threaded section and near the end of clamp screws
Thread segment, described non-threaded section can slide in screwed hole, and described thread segment can form screw-threaded engagement with screwed hole.
2. portable corner grinding machine as claimed in claim 1, it is characterised in that by relative to nut screwing clamping or unclamp clamping spiral shell
Nail, guard shield respectively enters and allows the tight condition of operation portable corner grinding machine and allow the Angle Position adjusting guard shield relative to housing
Adjustment state.
3. portable corner grinding machine as claimed in claim 1, it is characterised in that nut is permanently attached to the described of clamped flanges
On in two fastening lugs one.
4. portable corner grinding machine as claimed in claim 1, it is characterised in that the non-threaded section of the screw rod of clamp screws and screw thread
The longitudinal size of section is set to: make screwed hole and nut simultaneously can not produce screw-threaded engagement with thread segment.
5. the portable corner grinding machine as described in arbitrary in claims 1 to 3, it is characterised in that described screw holder is by pressing from both sides
The end of the increasing holding the screw rod of screw is constituted, and the end of described increasing is formed after clamp screws has been screwed into nut, and
Described end exposes from nut.
6. portable corner grinding machine as claimed in claim 5, it is characterised in that the screw rod of clamp screws is long enough to make at guard shield
Tight condition time described increasing end and nut between leave space.
7. portable corner grinding machine as claimed in claim 5, it is characterised in that the end of described increasing is by crimping or spot welding
Formed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2010/075887 WO2012019342A1 (en) | 2010-08-11 | 2010-08-11 | Portable angle grinder with improved protective guard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103068522A CN103068522A (en) | 2013-04-24 |
| CN103068522B true CN103068522B (en) | 2016-11-30 |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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