CN210779401U - Hook-shaped commutator for preventing insulating paint from falling off - Google Patents
Hook-shaped commutator for preventing insulating paint from falling off Download PDFInfo
- Publication number
- CN210779401U CN210779401U CN201922198833.4U CN201922198833U CN210779401U CN 210779401 U CN210779401 U CN 210779401U CN 201922198833 U CN201922198833 U CN 201922198833U CN 210779401 U CN210779401 U CN 210779401U
- Authority
- CN
- China
- Prior art keywords
- commutator
- hook
- copper sheet
- insulating varnish
- bakelite powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Motor Or Generator Current Collectors (AREA)
Abstract
The utility model discloses a prevent hook-type commutator that insulating varnish drops, make the switching-over copper sheet that the circumference was arranged including the bakelite powder base member and at the excircle of bakelite powder base member, the top of switching-over copper sheet is equipped with the bonding wire crotch, carries out the intertask through the dead slot between the adjacent switching-over copper sheet and insulates its characterized in that: the top end face of the bakelite powder substrate is provided with an upward conical bulge, and the surface of the conical bulge is provided with a concave-convex rough surface with the roughness not less than Ra12.5. The utility model discloses can make the commutator carry out the bonding wire, drip lacquer insulation treatment back, insulating varnish can stand thin and firmly freeze the top end face at the commutator, solves the technical problem that commutator during operation insulating varnish drops.
Description
Technical Field
The utility model relates to a commutator technical field, concretely relates to hook-type commutator.
Background
The hook-type commutator comprises a bakelite powder substrate and commutation copper sheets circumferentially arranged on the excircle of the bakelite powder substrate, wherein the adjacent commutation copper sheets are isolated from each other through insulating grooves, and the tops of the commutation copper sheets are provided with welding wire hooks. After the hook-type commutator is assembled with the rotor shaft, the welding wire hook of the commutator copper sheet needs to be welded with the wiring of the motor coil arranged on the rotor shaft in a spot welding mode, and after the spot welding, the spot welding part needs to be subjected to paint dripping insulation treatment. However, when the paint dripping insulation treatment is carried out, redundant insulating paint inevitably flows to the top end surface of the commutator to a greater or lesser extent, and is agglomerated and frozen on the surface of the bakelite powder substrate, and because the top periphery of the commutator is surrounded by the coil conducting wire after the wire is welded, the frozen insulating paint cannot be treated; and because of the hook-type commutator formed by the injection molding die, the bakelite powder matrix of the top end surface of the hook-type commutator has a dark smooth surface, and the surface roughness of the bakelite powder matrix is not more than Ra0.8. Therefore, the firmness of the combination of the insulating paint frozen on the surface of the bakelite powder substrate and the surface of the bakelite powder substrate is not enough, so that the insulating paint is easy to flake off from the top end surface of the commutator in the high-speed rotation process of the commutator during working, and the flaky insulating paint can uncontrollably move in the motor to cause serious potential safety hazards to the motor.
Disclosure of Invention
In view of the deficiencies of the prior art, the object of the present invention is to provide a hook-shaped commutator which can make the insulated paint be spread thin and firmly frozen on the top end surface after the insulated treatment of welding wire and dropping paint, and solve the technical problem of the shedding of the insulated paint during operation.
The utility model discloses a realize through following technical scheme:
prevent hook-type commutator that insulating varnish drops, including bakelite powder base member and the switching-over copper sheet of making circumference and arranging at the excircle of bakelite powder base member, the top of switching-over copper sheet is equipped with the bonding wire crotch, carries out the interband insulation through the insulating groove between the adjacent switching-over copper sheet, its characterized in that: the top end face of the bakelite powder substrate is provided with an upward conical bulge, and the surface of the conical bulge is provided with a concave-convex rough surface with the roughness not less than Ra12.5.
Above-mentioned technical scheme's hook-type commutator, its innovation key lies in, at first through the bellied area that increases the commutator top terminal surface of setting up of toper, make the insulating varnish that flows to the top terminal surface effectively spread out thinly can not appear the caking, then through carrying out the spark-erosion machining to the pressure injection mould, make the pressure injection mould form small unsmooth vestige at the die cavity inner wall that corresponds commutator top terminal surface, so, through the fashioned hook-type commutator of pressure injection mould, the bakelite powder base member surface of its top terminal surface just has high roughness, like this hook-type commutator is when carrying out the bonding wire, drip paint insulation treatment, the unnecessary insulating varnish that flows to commutator top terminal surface can be spread out thinly and can form firm combination with the bakelite powder base member after freezing, effectively prevent the droing of commutator during operation, and then eliminate the potential safety hazard of motor work.
Preferably, the surface roughness of the pyramidal projections is not greater than Ra 25.
Preferably, the uneven surface is formed by small concave points densely arranged on the surface of the conical projection.
Preferably, the conical angle of the conical projection is 24-32 degrees. The taper designed above can make the redundant insulating paint flowing to the top end surface of the commutator be well thinned, and prevent caking.
Drawings
The utility model discloses there is following figure:
figure 1 is a schematic structural diagram of the present invention,
fig. 2 is a state diagram of the utility model when spot welding and dropping paint insulation treatment are carried out.
Detailed Description
As shown in fig. 1, the utility model discloses a prevent hook-type commutator that insulating varnish drops, make the switching-over copper sheet 5 that the circumference was arranged including bakelite powder base member 6 and at the excircle of bakelite powder base member 6, switching-over copper sheet 5's top is equipped with bonding wire crotch 4, it is insulating between the adjacent switching-over copper sheet 5 to carry out the interband through insulating bath 1, bakelite powder base member 6's top terminal surface has ascending toper arch 3, toper arch 3's cone angle is 24-32 degrees, toper arch 3's surface has roughness not less than Ra12.5, be not more than Ra 25's unsmooth surface, unsmooth surface is formed by the little concave point 2 of densely covered setting in toper arch 3 surfaces.
As shown in fig. 2, the utility model discloses a hook-type commutator, when carrying out wire winding spot welding, drip lacquer insulation treatment, the operating condition of hook-type commutator is that the top sets up to one side downwards, and unnecessary insulating varnish can flow to the top terminal surface of commutator, and the toper arch makes insulating varnish can not appear the caking by effective shakeout, and the high roughness on toper protruding surface makes insulating varnish can form firm the combination with bakelite powder base member after freezing.
Claims (4)
1. Prevent hook-type commutator that insulating varnish drops, including bakelite powder base member and the switching-over copper sheet of making circumference and arranging at the excircle of bakelite powder base member, the top of switching-over copper sheet is equipped with the bonding wire crotch, carries out the interband insulation through the insulating groove between the adjacent switching-over copper sheet, its characterized in that: the top end face of the bakelite powder substrate is provided with an upward conical bulge, and the surface of the conical bulge is provided with a concave-convex rough surface with the roughness not less than Ra12.5.
2. The hook-type commutator for preventing the insulating varnish from dropping as set forth in claim 1, wherein: the surface roughness of the conical protrusions is not more than Ra 25.
3. The hook-type commutator for preventing the insulating varnish from dropping as set forth in claim 1 or 2, wherein: the concave-convex rough surface is formed by small concave points densely distributed on the surface of the conical protrusion.
4. The hook-type commutator for preventing the insulating varnish from dropping as set forth in claim 1, wherein: the cone angle of the conical projection is 24-32 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922198833.4U CN210779401U (en) | 2019-12-10 | 2019-12-10 | Hook-shaped commutator for preventing insulating paint from falling off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922198833.4U CN210779401U (en) | 2019-12-10 | 2019-12-10 | Hook-shaped commutator for preventing insulating paint from falling off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210779401U true CN210779401U (en) | 2020-06-16 |
Family
ID=71038612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922198833.4U Active CN210779401U (en) | 2019-12-10 | 2019-12-10 | Hook-shaped commutator for preventing insulating paint from falling off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210779401U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021114833A1 (en) * | 2019-12-10 | 2021-06-17 | 安固集团有限公司 | Hook-type commutator capable of preventing insulating varnish from coming off |
-
2019
- 2019-12-10 CN CN201922198833.4U patent/CN210779401U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021114833A1 (en) * | 2019-12-10 | 2021-06-17 | 安固集团有限公司 | Hook-type commutator capable of preventing insulating varnish from coming off |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210779401U (en) | Hook-shaped commutator for preventing insulating paint from falling off | |
| CN104014996B (en) | Aluminum alloy annular blank manufacturing method and backward extruding die | |
| CN202021443U (en) | Mold for welding impeller | |
| CN201950432U (en) | Knurl processing device | |
| CN110854636A (en) | Hook-shaped commutator for preventing insulating paint from falling off | |
| CN202411311U (en) | Cold upsetting die for dovetail groove screw | |
| CN204747376U (en) | Hubbed flange makes up ring mould of passing through many hands or places | |
| CN204159810U (en) | The little pattern draft forging mold of aluminium alloy | |
| CN211017681U (en) | Hook-type commutator | |
| CN110524792B (en) | Machining process of commutator | |
| CN204350347U (en) | Graphite electrode nipple | |
| CN204267929U (en) | A kind of powder metallurgy water pump flange | |
| CN109940232B (en) | ox horn insert processing device | |
| CN107968303B (en) | Hook-type commutator | |
| CN207005043U (en) | A kind of new automobile grounding nut | |
| CN109773111A (en) | The cold heading technique of automobile exhaust pipe connecting flange | |
| CN210040822U (en) | Splined inner hole hook type commutator | |
| CN210607971U (en) | Crimping mould of pencil terminal | |
| CN220612241U (en) | Die casting device is used in inductor processing | |
| CN110666323A (en) | Combined electrode suitable for resistance welding | |
| CN219254008U (en) | Parking ratchet warm forging die | |
| CN210779403U (en) | Single-reinforced ring hook type commutator | |
| CN206067884U (en) | A kind of vehicle and its vehicle frame | |
| CN207765518U (en) | A kind of failure of current device for car lithium battery capping structure | |
| CN208495767U (en) | A kind of liftout attachment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |