CN203627590U - Electromagnetic clutch - Google Patents
Electromagnetic clutch Download PDFInfo
- Publication number
- CN203627590U CN203627590U CN201320684874.4U CN201320684874U CN203627590U CN 203627590 U CN203627590 U CN 203627590U CN 201320684874 U CN201320684874 U CN 201320684874U CN 203627590 U CN203627590 U CN 203627590U
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- China
- Prior art keywords
- coil
- coil case
- circular groove
- magnetic clutch
- case lid
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Abstract
The utility model provides an electromagnetic clutch. According to the electromagnetic clutch, the problem that even when the electromagnetic clutch works in a polluted environment, a coil loses efficiency due to heat emission or damage is solved. The electromagnetic clutch comprises a sucker, a coil component and a rotary piece. An annular groove is formed in the rotary piece, the coil component is embedded in the annular groove, and the coil component comprises the coil, a coil shell containing the coil and a coil shell cover arranged on the back face of the coil shell. The electromagnetic clutch is characterized in that a gap between the coil shell cover and the annular groove is small enough so that a dust blocking structure can be formed and the dust blocking structure can prevent foreign matter from entering the gap between the coil shell and the annular groove.
Description
Technical field
The utility model relates to a kind of magnetic clutch, in particular for the magnetic clutch of air condition compressor.
Background technique
Model utility content
The purpose of this utility model is to provide a kind of magnetic clutch, even if in the environment polluting while working, does not also have coil heating or disorderly wound and the problem that lost efficacy.
For realizing the magnetic clutch of described object, comprise sucker, coil component and revolving part, revolving part is with circular groove, coil component is embedded in circular groove, coil component comprises coil, holds the coil case of coil and the coil case lid at the coil case back side, is characterized in, the gap between coil case lid and circular groove is enough little, to such an extent as to forming dust-break structure, this dust-break structure can stop that foreign matter enters into the gap between coil case and circular groove.
Described magnetic clutch, its further feature is that the radius R 2 of described coil case lid is greater than the external diameter R1 of circular groove.
Described magnetic clutch, its further feature is, and described coil case lid forms edge part, and this edge part extends axially, and surrounds the cycle surface of revolving part, to stop that foreign matter enters into the gap between coil case and circular groove.
Described magnetic clutch, its further feature is that the radius R 2 of described coil case lid equals the external diameter R1 of circular groove.
Described magnetic clutch, its further feature is, R2-R1>2mm, and described gap width is set to 0.5mm-1.5mm.
By carrying out dust-break structure, dust is stopped substantially between coil case circular groove, can be avoided like this at coil heating or disorderly hinder and the problem of inefficacy.
Accompanying drawing explanation
Fig. 1 is the sectional view of the utility model embodiment 1 magnetic clutch.
Fig. 2 is the right elevation of magnetic clutch in Fig. 1.
Fig. 3 is the partial schematic diagram of the utility model embodiment 1 magnetic clutch.
Fig. 4 is the sectional view of the new embodiment's 2 of this practicality magnetic clutch.
Fig. 5 is the sectional view of the new embodiment's 3 of this practicality magnetic clutch.
Fig. 6 is the sectional view of the magnetic clutch of prior art.
Embodiment
As shown in Figure 6, the external diameter of coil case lid 2 of the prior art is arranged to be significantly less than the external diameter of belt pulley circular groove 3.When above-mentioned magnetic clutch is worked in the environment polluting, dust easily enters in the gap between coil and belt pulley, in the time that dirt accumulation is too much, rubs with coil case, causes coil heating or unrest hinder and lost efficacy.According to aforementioned discovery, aftermentioned embodiment can avoid at coil heating or disorderly hinder and the problem of inefficacy.
Magnetic clutch is used for transmitting rotation torque, and the magnetic clutch of for example compressor is arranged on motor and transmits on the path of rotating force to compressor, realizes transmission of power and continues or stop.Compressor comprises the main shaft 30 and the compressing mechanism (not shown) that are driven and rotate.When magnetic clutch adhesive, the rotating force on motor passes to main shaft by magnetic clutch.In main shaft rotary work, compressing mechanism gives main shaft one load.
In aftermentioned embodiment, the external diameter of circular groove 4 or outer radius refer to the radius of the outer side wall of circular groove 4.Can understand with reference to the radius R 1 in figure 1.
As shown in Figure 1 and Figure 2, magnetic clutch comprises as the belt pulley 1 of revolving part, wheel hub 31, the sucker 10 relative with belt pulley 1, is embedded in the coil component 20 in the circular groove 4 of belt pulley 1, and motor carrys out drive pulley 1 by belt.Wherein, wheel hub 31 is enclosed within the periphery of compressor main shaft 30, and both keys coordinate; Between wheel hub 31 and sucker 10, be fixedly connected with; Belt pulley 1 is arranged on outside compressor cylinder cover 32, and bearing 33 is housed between the two; When adhesive, not there is not micro-gap between belt pulley 1 and sucker 10 in clutch, although therefore belt pulley 1 is with engine revolution, other part in clutch still keeps static; After coil 21 energisings, belt pulley 1 excitation, attracts sucker 10 to fit with it, and by transmission of power, to sucker 10, it is static that coil component 20 still keeps.
Because belt pulley 1 rotates, and coil component 20 keeps static, and both exist relative movement.Dust easily enters from the clearance G radially between belt pulley circular groove 4 and coil component 20.
The present embodiment is arranged to the external diameter of coil case lid 25 to be greater than the external diameter (radius of outer side wall) of circular groove 4, can stop dust and directly enter clearance G from positive S1.In theory the external diameter of coil case lid 25 is designed greatlyr, and gap design between the cycle surface of belt pulley 1 must be less, dust clearance G more difficult to get access.But consider that coil case lid 25 produces distortion, magnetic line of force ability of aggregation problem in the time of welding, clearance G 2 between coil case lid 25 and the cycle surface of belt pulley 1 is made as to 0.5mm-1.5mm, and the outer radius R1>2mm of coil case lid radius R 2-circular groove.Under belt pulley 1 rotates, produce centrifugal force, in the more difficult arrival clearance G of dust S2 of side.
As shown in Figure 3, in the time that the dust of the side direction S20 from coil case lid 25 edges towards the edge of circular groove 4 flies at a high speed, most probable enters in clearance G, as shown in the figure, the coil case lid 25 of the present embodiment is applied on conventional electromagnetic clutch for compressor, size is set as respectively, the outer ring thickness D=4mm of belt pulley 1, clearance G=0.4mm, Δ R=R2-R1=5mm, clearance G 2 is 1mm, there is extruding fillet R3=2mm in coil case 22 bottoms, direction S20 only drops on extruding fillet, at dust self, moisture, under the Action of Gravity Field of foreign matter, will be by fillet landing, and be difficult for entering clearance G.
The structure of the present embodiment is simpler, does not also increase the welding difficulty between coil case 22 and coil case lid 25, and relatively prior art can stop positive dust, moisture, the foreign matter entering from the side with major part that blow.But under rugged environment, do not get rid of the opening part that still has a small amount of dust can be stuck in clearance G.
With embodiment's 1 difference be, the external diameter R2 of coil case lid 25 is greater than the outer ring of belt pulley 1, is provided with the edge part 26 stretching out to the direction of belt pulley 1, and the axial height of edge part 26 is greater than the value of clearance G 2, the cycle surface of belt pulley 1 is enclosed in edge part 26, as shown in Figure 4.In coil case lid 25 stamping processs, can form edge part 26 simultaneously.
The dust entering, moisture, foreign matter that edge part 26 can stop side are up hill and dale set, even under rugged environment, also can keep cleaning in belt pulley circular groove 4.
After the coil of some magnetic clutch is embedded in circular groove, it is highly starkly lower than the height of circular groove.For this situation, increase coil case lid 25 external diameters, be set to the external diameter that is more than or equal to coil case 22, also can dwindle positive S1 and enter the opening of clearance G, coil case lid 25 is combined to form obstruct with the wall of circular groove 4, and minimizing dust, foreign matter, moisture enter clearance G.Specifically be arranged to: 0.3mm≤R2 – R1≤1mm, the external diameter of coil case 22 is R4, R2 >=R4.As shown in Figure 5.
Claims (5)
1. magnetic clutch, comprise sucker, coil component and revolving part, revolving part is with circular groove, coil component is embedded in circular groove, coil component comprises coil, holds the coil case of coil and the coil case lid at the coil case back side, it is characterized in that, the gap between coil case lid and circular groove is enough little, to such an extent as to forming dust-break structure, this dust-break structure can stop that foreign matter enters into the gap between coil case and circular groove.
2. magnetic clutch as claimed in claim 1, is characterized in that, the radius R 2 of described coil case lid is greater than the external diameter R4 of coil case.
3. magnetic clutch as claimed in claim 2, is characterized in that, described coil case lid forms edge part, and this edge part extends axially, and surrounds the cycle surface of revolving part, to stop that foreign matter enters into the gap between coil case and circular groove.
4. magnetic clutch as claimed in claim 1, is characterized in that, the radius R 2 of described coil case lid is greater than the external diameter R1 of circular groove.
5. magnetic clutch as claimed in claim 2, is characterized in that, the external diameter R1>2mm of the radius R 2-circular groove of described coil case lid, and described gap width is set to 0.5mm-1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320684874.4U CN203627590U (en) | 2013-10-30 | 2013-10-30 | Electromagnetic clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320684874.4U CN203627590U (en) | 2013-10-30 | 2013-10-30 | Electromagnetic clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203627590U true CN203627590U (en) | 2014-06-04 |
Family
ID=50814074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320684874.4U Expired - Fee Related CN203627590U (en) | 2013-10-30 | 2013-10-30 | Electromagnetic clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203627590U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111005950A (en) * | 2019-12-28 | 2020-04-14 | 华域三电汽车空调有限公司 | Electromagnetic clutch structure and compressor |
| US10883552B2 (en) | 2019-04-10 | 2021-01-05 | Warner Electric Technology Llc | Rotational coupling device with flux conducting bearing shield |
-
2013
- 2013-10-30 CN CN201320684874.4U patent/CN203627590U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10883552B2 (en) | 2019-04-10 | 2021-01-05 | Warner Electric Technology Llc | Rotational coupling device with flux conducting bearing shield |
| CN111005950A (en) * | 2019-12-28 | 2020-04-14 | 华域三电汽车空调有限公司 | Electromagnetic clutch structure and compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Shanghai City 200025 Madang Road No. 347 Patentee after: SANDEN HUAYU AUTOMOTIVE AIR-CONDITIONING CO., LTD. Address before: 200025 Shanghai City, Huangpu District Shanghai City Madang Road No. 347 Patentee before: Sandian Beier Automobile Air-Conditioner Co., Ltd., Shanghai |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20191030 |