CN205383170U - Electric tool and thermal -insulated packing ring and carbon brush holder thereof - Google Patents
Electric tool and thermal -insulated packing ring and carbon brush holder thereof Download PDFInfo
- Publication number
- CN205383170U CN205383170U CN201620150715.XU CN201620150715U CN205383170U CN 205383170 U CN205383170 U CN 205383170U CN 201620150715 U CN201620150715 U CN 201620150715U CN 205383170 U CN205383170 U CN 205383170U
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- CN
- China
- Prior art keywords
- heat insulating
- carbon brush
- insulating washer
- threaded shank
- brush holder
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Abstract
The utility model provides a thermal -insulated packing ring and have the carbon brush holder and the electric tool of this thermal -insulated packing ring, thermal -insulated packing ring totality is flat ring -type, has the inner circle that outer lane and confession screw section wore to establish, inner circle circumference distribute have two at least notches and be formed with the crooked alar part of being convenient for between the notch, the diameter of the inner ring of inner circle is less than screw section's screw rod external diameter. The inner circle of thermal -insulated packing ring can produce crookedly when the equipment, keep apart generate heat parts with wear to locate threaded connection's reliability is guaranteed in heat transfer between the bolt of inner circle.
Description
Technical field
The application is broadly directed to field of power tools, more particularly to being used for isolating the heat insulating washer of heat transmission between carbon brush holder and fixing bolt.
Background technology
Electric tool is generally of the carbon brush holder making the carbon brush in motor keep in touch with commutator, can join Japanese invention Patent Publication No 2009-148855.Described carbon brush holder is fitted together by the threaded engagement of bolt Yu plastic body, and has and flexibly make carbon brush remain stable for the arrived tableting contacted with commutator.During electric tool work, higher heat can be produced during due to carbon brush and commutator sliding contact, this heat can be delivered to bolt via carbon brush holder from carbon brush, temperature near bolt exceedes the temperature of tool housing when bearing limit, the female thread coordinated with bolt on plastic body can produce to melt, so that carbon brush holder is even departed from relative to fixing the loosening of tool housing, gently then cause product failure, heavy then bring potential safety hazard to user.
Accordingly, it would be desirable to existing electric tool and carbon brush holder thereof are improved, to overcome the defect existed in prior art.
Utility model content
The application is intended to isolate heat transmission between carbon brush holder and fixing bolt, it is to avoid solid failure.
For this, an aspect according to the application, this utility model provides a kind of heat insulating washer, totally in flat annular, having outer ring and the inner ring worn for threaded shank, described inner ring is circumferentially distributed to be had at least two notch and is formed with the alar part being easy to bending between described notch.
According to a kind of embodiments possible, described heat insulating washer includes at least three layers Kapton.
This utility model additionally provides a kind of carbon brush holder with described heat insulating washer, comprising:
Main part, including the pressure section of the stator and resilient abutment carbon brush outer end with installing hole；
Bolt, has threaded shank and cap end, and described threaded shank is arranged in the installing hole of described main part and can be rotated with in the screwed hole offered to plastic body；
Heat insulating washer, it is sheathed on described threaded shank and is placed between the cap end of described bolt and the stator of described main part, described alar part is placed between threaded shank and the inner ring of heat insulating washer of described bolt, and the inner ring diameter of described heat insulating washer inner ring is less than the outer screw diameter of described threaded shank.
According to a kind of embodiments possible, the diameter of described alar part root is more than or equal to the outer screw diameter of described threaded shank.
According to a kind of embodiments possible, described alar part is at the described heat insulating washer width radially thickness less than or equal to described stator.
According to a kind of embodiments possible, described alar part have be resisted against described bolt) and be parallel to the terminal part of threaded shank central axis.
This utility model additionally provides a kind of electric tool, and it includes plastic body and carbon brush holder.
According to a kind of embodiments possible, described stator is connected to described plastic body back to the one side of described heat insulating washer.
According to the application, the inner ring of heat insulating washer described in the utility model can produce bending when assembling, the heat transmission between isolation heat generating components and the bolt being arranged in described inner ring, it is ensured that threaded reliability.
Accompanying drawing explanation
To understand and recognize the above-mentioned of the application and other side more up hill and dale below according to detailed description of the invention and in conjunction with accompanying drawing, in the accompanying drawings:
Fig. 1 is the perspective view of this utility model heat insulating washer；
Fig. 2 is that after heat insulating washer shown in Fig. 1 is assembled to carbon brush holder and plastic body, the solid of local combines schematic diagram；
Fig. 3 is the partial schematic sectional view that direction shown in A-A is observed along Fig. 2.
Detailed description of the invention
Embodiments possible more of the present utility model are described with reference to the accompanying drawings.In different drawings, same or analogous parts are presented with like reference characters.Should be appreciated that accompanying drawing is only for illustrating this utility model, wherein the number of the size of parts, proportionate relationship and parts is all not as to restriction of the present utility model simultaneously.
Refer to shown in Fig. 1 to Fig. 3, carbon brush holder 20 and the electric tool being mainly improved by a kind of heat insulating washer 10 and applying this heat insulating washer 10 of the present utility model.Described heat insulating washer 10, overall in flat annular, there is outer ring 101 and the inner ring 102 worn for threaded shank 2021, described inner ring 102 circumference equal distribution has three notches 1021 and is formed with the alar part 1022 (in Fig. 1, dotted portion is folding line signal) being easy to bending between described notch 1021, and the inner ring diameter 102D of described inner ring 102 is less than the outer screw diameter 2021D of described threaded shank 2021.On the basis of existing heat insulating washer 10 isolation, the described inner ring diameter 102D design less than outer screw diameter 2021D, further such that alar part 1022 produces bending when being sheathed with threaded shank 2021, the contacting of isolation threaded shank 2021 and outer metalwork, it is to avoid high heat is transferred to threaded shank 2021 and melts plastic body and cause the problems such as solid failure.The diameter 2022D of described alar part 1022 root is more than or equal to the outer screw diameter 2021D of described threaded shank 2021, and heat insulating washer 10 will not be damaged by the deformation to ensure alar part 1022.Described heat insulating washer 10 includes at least three layers Kapton, to obtain heat-proof quality and the flexibility of heat insulating washer 10 relative equilibrium.Owing to the inner ring 102 of heat insulating washer 10 described in the utility model can produce bending when assembling, the heat transmission between isolation heat generating components and the bolt being arranged in described inner ring, it is ensured that threaded reliability.
Emphasis introduces the situation after heat insulating washer 10 is assembled to carbon brush holder 20 in conjunction with Fig. 2 and Fig. 3 below, and described carbon brush holder 20 includes: main part 201, including the pressure section 2012 of the stator 2011 and resilient abutment carbon brush outer end with installing hole 2011a；Bolt 202, has described threaded shank 2021 and cap end 2022, and described threaded shank 2021 is arranged in the installing hole 2011a of described main part 201 and can be rotated with in the screwed hole 301 offered to plastic body 30；Heat insulating washer 10, is sheathed between cap end 2022 and the stator 2011 of described main part 201 that described threaded shank 2021 is placed in described bolt 202, and described alar part 1022 is placed between threaded shank 2021 and the inner ring 102 of heat insulating washer 10 of described bolt 202.From Fig. 3 can very intuitively to, the heat insulating washer 10 of the application has isolated the contact of stator 2011 and cap end 2022 and the contact of installing hole 2011a and threaded shank 2021, effectively prevent heat to be delivered between the threaded shank 2021 of threaded engagement and screwed hole 301 by carbon brush holder 20, cause the problem that fusing destroys.Described alar part 1022 is at the described heat insulating washer 10 width Delta D radially thickness less than or equal to described stator 2011, owing to the thickness of heat insulating washer 10 is notable and can not ignore, this design can avoid the alar part 1022 that there is redundancy, cause that bolt 202 causes alar part 1022 crimp when screwing, and then heat insulating washer 10 is damaged, the isolation effect that impact is actual, one preferably design be: described alar part 1022 has and is resisted against described bolt 202 and is parallel to the terminal part (sign) of threaded shank 2021 central axis, terminal part so can be utilized installing hole 2011a and threaded shank 2021 to be isolated；Certainly, alar part 1022 also not necessarily requires to participate in isolation, for instance it can be designed to comparatively short, but still can utilize the bending that cap end 2022 junction is formed that installing hole 2011a and threaded shank 2021 are guided, it is to avoid contact.It should be noted that, the design avoids carbon brush holder 20 to the conduction of heat of threaded shank 2021 and then the problem of thread failure that causes, strictly refusal carbon brush holder 20 does not contact with any of plastic body 30, in fact, stator 2011 described in the present embodiment is just connected on plastic body 30 back to the one side of described heat insulating washer 10, because the softening fusing that plastic body 30 surface is suitable also will not threaded engagement be lost efficacy, it is possible to so that carbon brush holder 20 produces suitable heat release.
It may be noted that, in previously described specific embodiment, describe described inner ring 102 circumference equal distribution and have the design of three notches 1021, but, those skilled in the art can also require to design the notch of other different sizes according to the flexible size of specific design demand and heat insulating washer etc., for instance: non-decile is arranged；Arranging two, four or more notch etc., this is equally possible realizes the purpose of this utility model.In addition, when carrying out size with the diameter 2022D of the inner ring diameter 102D in above-described embodiment and alar part root and comparing, the diameter of bolt 202 is with the outer screw diameter 2021D of threaded shank 2021 for reference, this is not meant to when threaded shank 2021 coordinates must contact with described heat insulating washer 10, for instance when the situation in one section of polished rod portion of part existence that threaded shank 2021 is connected with cap end 2022.Furthermore, the electric tool in above-described embodiment is specially a kind of angle grinding machine, but the scope that can be suitable for of the application is not limited to the electric tool of a certain or a certain class.
Although describing the application herein with reference to specific embodiment, but scope of the present application being not limited to shown details.When not necessarily departing from the ultimate principle of the application, various amendment can be made for these details.
Claims (8)
1. a heat insulating washer (10), overall in flat annular, there is outer ring (101) and the inner ring (102) worn for threaded shank (2021), it is characterised in that: described inner ring (102) is circumferentially distributed to be had at least two notch (1021) and is formed with the alar part (1022) being easy to bending between described notch (1021).
2. heat insulating washer as claimed in claim 1, it is characterised in that: described heat insulating washer includes at least three layers Kapton.
3. a carbon brush holder (20) with heat insulating washer described in claim 1 or 2 (10), it is characterised in that described carbon brush holder includes:
Main part (201), including the pressure section (2012) of the stator (2011) and resilient abutment carbon brush outer end with installing hole (2011a)；
Bolt (202), having threaded shank (2021) and cap end (2022), described threaded shank (2021) is arranged in the installing hole (2011a) of described main part (201) and can be rotated with in the screwed hole (301) offered to plastic body (30)；
Heat insulating washer (10), it is sheathed on described threaded shank (2021) and is placed between the cap end (2022) of described bolt (202) and the stator (2011) of described main part (201), described alar part (1022) is placed between the threaded shank (2021) of described bolt (202) and the inner ring (102) of heat insulating washer (10), and the inner ring diameter (102D) of described heat insulating washer (10) inner ring (102) is less than the outer screw diameter (2021D) of described threaded shank (2021).
4. carbon brush holder (20) as claimed in claim 3, it is characterised in that: the diameter (2022D) of described alar part (1022) root is more than or equal to the outer screw diameter (2021D) of described threaded shank (2021).
5. carbon brush holder as claimed in claim 4, it is characterised in that: described alar part (1022) is at described heat insulating washer (10) width (Δ D) the radially thickness less than or equal to described stator (2011).
6. carbon brush holder as claimed in claim 5, it is characterised in that: described alar part (1022) has and is resisted against described bolt (202) and is parallel to the terminal part of threaded shank (2021) central axis.
7. an electric tool, it is characterised in that: include the carbon brush holder (20) according to any one of plastic body (30) and claim 3-6.
8. electric tool as claimed in claim 7, it is characterised in that: described stator (2011) is connected to described plastic body (30) back to the one side of described heat insulating washer (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620150715.XU CN205383170U (en) | 2016-02-29 | 2016-02-29 | Electric tool and thermal -insulated packing ring and carbon brush holder thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620150715.XU CN205383170U (en) | 2016-02-29 | 2016-02-29 | Electric tool and thermal -insulated packing ring and carbon brush holder thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205383170U true CN205383170U (en) | 2016-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620150715.XU Active CN205383170U (en) | 2016-02-29 | 2016-02-29 | Electric tool and thermal -insulated packing ring and carbon brush holder thereof |
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| CN (1) | CN205383170U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107516962A (en) * | 2017-09-29 | 2017-12-26 | 杭州桢正玮顿运动控制技术有限公司 | A kind of Novel servomotor |
-
2016
- 2016-02-29 CN CN201620150715.XU patent/CN205383170U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107516962A (en) * | 2017-09-29 | 2017-12-26 | 杭州桢正玮顿运动控制技术有限公司 | A kind of Novel servomotor |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |