CN101242061A - A flat converter and its making method - Google Patents
A flat converter and its making method Download PDFInfo
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- CN101242061A CN101242061A CNA2008100841321A CN200810084132A CN101242061A CN 101242061 A CN101242061 A CN 101242061A CN A2008100841321 A CNA2008100841321 A CN A2008100841321A CN 200810084132 A CN200810084132 A CN 200810084132A CN 101242061 A CN101242061 A CN 101242061A
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- segment
- commutator
- supporter
- flat converter
- contact
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Abstract
A plate type commutator comprises an insulating supporting body with a central axis hole, and a commutator body arranged on the end of the supporting body, the commutator body comprises a plurality of commutating segments, each commutating segment comprises a connecting hook and a contact segment, the side of the contact segment facing to the end plane of the supporting body is provided with a plurality of projections or dents, the area of the cross section of the projection gradually reduces to the direction of the supporting body, and the area of the cross section of the dent gradually reduces to the direction of the inner part of the contact segment. The method for manufacturing the plate type commutator comprises the following steps: a cold pressing step; a blanking step; a pressure-injecting procedure; and a groove milling and hook bending procedure. The plate type commutator of the invention can increase the contact strength between the commutating segment and the supporting body and has stable service behavior.
Description
Technical field
The present invention relates to a kind of flat converter and preparation method thereof.Relate in particular to a kind of manufacture method of the flat converter that on motor, uses and the commutator that this method is made.
Background technology
Existing flat converter exists between commutator segment and insulated leg to contact intensity difference usually, has film dancing, film flying phenomenon.Chinese patent literature CN2583841Y discloses a kind of structure of overall plastic flat commutator, by in commutator segment and the contacted one side setting of bakelite " eight " font structure, in order to increase the contact strength between commutator segment and bakelite, the preparation process of this commutator is also disclosed in the specification of the document in addition: form the commutator body by copper coin through cold extrusion, make the foot of commutator segment become " eight " word structure through cold punching system, be pressed into phenolic moulding powder again and form commutator.But still there is following problem in the prior art of putting down in writing in this patent documentation: on the one hand owing to will go out " eight " word structure by cold punching on commutator segment, just require cold-punching mold just must possess corresponding special construction, and big outer little special construction is unfavorable for the demoulding of mould in this, makes complex manufacturing; And because " eight " word structure is comparatively complicated, thereby can not be provided with much in this number of structures of die surface, and increasing along with this number of structures, the attached intensity of grabbing between commutator segment and supporter neither increasing and increase with quantity, mainly be because increasing of this structure directly caused reducing of the sectional area of supporter own, thereby cause when the commutator high speed rotating, supporter easily comes off commutator segment in the fracture of " eight " word structure place, causes production accident.
Summary of the invention
For this reason, technical problem to be solved by this invention is to propose to grab that attached intensity is big, manufacturing process simple flat plate formula commutator between a kind of commutator segment and supporter, and the preparation method in a kind of above-mentioned flat converter further is provided.
For solving the problems of the technologies described above, flat converter provided by the present invention comprises an insulation support body 20 with central axis hole 30, and the commutator body that is arranged at described supporter 20 end faces, described commutator body comprises a plurality of commutator segments 10, each described commutator segment 10 includes butt hook 12 and contact-segment 11, the contact-segment 11 of described commutator segment 10 towards a side of described supporter 20 end faces have a plurality of protruding 14 or indent 14 ', described protruding 14 area of section reduces gradually towards the direction of described supporter 20, described indent 14 ' the direction of area of section towards described contact-segment 11 inside reduce gradually.
Described protruding 14 is the spike projection.
Described indent 14 ' be the spike indent.
Described contact-segment 11 has a plurality of hooks 13,13 ' that bend into described supporter 20.
Described hook 13 on each commutator segment 10,13 ' and described butt hook 12 be positioned at same footpath upwards.
The method of manufacturing flat converter provided by the present invention may further comprise the steps:
(1) cold extrusion step is carried out cold extrusion in mould, form the blank of the linkage section 11 with central axis hole 30 and commutator segment 10, on described linkage section 11, be formed with several projectioies 14 or indent 14 ';
(2) blanking step forms the copper shell that is used to make flat converter with butt hook 12;
(3) injection-compression molding step is positioned over described copper shell in compression moulding die, and to wherein injecting the insulation support body injection material, pressure injection goes out insulation support body;
(4) groove milling and crotch step.
In the preceding step that described copper shell is carried out shaping that also comprises of step (3), make the copper shell of flat converter to form higher being used to of precision.
After step (1), also comprise punch steps, to form the hook 13,13 ' on the described linkage section 11.
Technique scheme of the present invention has tangible advantage compared to existing technology, is mainly reflected in:
(1) since the commutator segment of flat converter of the present invention at linkage section towards the relative side of described supporter end face, be provided with the projection or the concave inward structure of One's name is legion, increased the grasping force between described commutator segment and supporter greatly, and described projection or concave inward structure are simple, it is very little that each projection or concave inward structure can be provided with, thus quantity can be provided with very many, can increase greatly, contact-making surface connects between commutator segment and supporter, so that the grasping force between it strengthens greatly thereupon.
(2) simultaneously, because projection or concave inward structure are simple, the area of section of described projection reduces gradually towards the direction of described supporter, the area of section of described indent reduces gradually towards the direction of described contact-segment inside, therefore reduced requirement, and be convenient in demoulding in producing the cold stamping die structure.
(3) method of manufacturing flat converter of the present invention, step is simple, and is easy to operate, reduced production cost.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below according to a particular embodiment of the invention and in conjunction with the accompanying drawings, the present invention is further detailed explanation.At first accompanying drawing is carried out brief description, wherein:
Fig. 1 is the structural representation of an embodiment of flat converter of the present invention;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is the partial enlarged drawing of commutator segment and supporter contact zone among Fig. 2;
Fig. 4 is the partial enlarged drawing of commutator segment and supporter contact zone among Fig. 2.
Embodiment
The invention will be further described below in conjunction with drawings and Examples, but should be noted that these embodiment only are used to method of the present invention is described, and scope of the present invention can not be confined to this.
Below will the structure of flat converter of the present invention be described and describe.
Flat converter of the present invention mainly comprises: an insulation support body 20 with central axis hole 30, and the commutator body that is arranged at described supporter 20 end faces, described commutator body comprises a plurality of commutator segments 10, each described commutator segment 10 includes butt hook 12 and contact-segment 11, plane, described contact-segment 11 place is perpendicular to central axis hole 30, and between adjacent commutator segment, there is a groove 40 radially, guarantees non-conductive connection between commutator segment.Be illustrated in figure 1 as specific embodiment of flat converter of the present invention, comprise 6 commutator segments 10 and a bakelite supporter 20, certainly, the number of commutator segment 10 can increase and decrease as the case may be, as 5 or 8 etc.Next various piece in the flat converter is described respectively and describes.
Commutator segment 10: as shown in Figure 2, commutator segment 10 comprises and being used for and the contacted contact-segment 11 of brush, connects the butt hook 12 of winding.As shown in Figure 3, have a plurality of going deep in contact-segment 11 side relative and play the effect that increases the contact strength between commutator segment and supporter to the projection 14 of the spike structure of supporter inside with described supporter end face; In addition, in contact-segment 11 side relative two hooks 13 and 13 ' that bend into to supporter 20 are set with described supporter end face, play the effect of grabbing attached intensity between further raising commutator segment and supporter, described hook 13 is positioned at the end that commutator segment is close to central axis hole 30, described hook 13 ', be positioned at away from an end of central axis hole 30 and an end of close butt hook 12, described hook 13 and hook 13 ' are arranged on butt hook 12 and are positioned at same footpath upwards.Certainly, in a further embodiment, described hook 13 can only be set or described hook 13 ' only is set, and increase the quantity of hook according to actual needs.The purpose of design hook is further to have increased the contact area between commutator segment and supporter, strengthen the contact force that grasps between the two, make combine between commutator segment and bakelite supporter tightr, guaranteed that the situation of film flying or film dancing takes place at the Shi Buhui that runs up commutator, in addition, hook and butt hook are preferably disposed on the reason that same footpath makes progress, commutator segment is contacted symmetrically and evenly with supporter, when running up, a commutator segment part is stressed evenly, the rough sledding such as film flying film dancing of avoiding unbalance stress to cause.In the present invention, flat converter is called end face towards the one side of brush, and the corresponding one side consistent with the commutator end face is called the supporter end face.
In another specific embodiment, as shown in Figure 4, in contact-segment 11 side relative the projection of going deep into to the spike structure of supporter inside 14 is not set, but has a plurality of spike indents 14 ' towards contact-segment 11 1 sides in contact-segment 11 side relative with described supporter end face with described supporter end face.
Because protrusions of the present invention or concave inward structure are simple, the area of section of described projection reduces gradually towards the direction of described supporter, the area of section of described indent reduces gradually towards the direction of described contact-segment inside, therefore reduced requirement, and be convenient in demoulding in producing the cold stamping die structure.
The structure of above middle plateform formula commutator of the present invention describes and describes, and the manufacture method to flat converter of the present invention describes and describes below.But should be noted that these embodiment only are used to method and apparatus of the present invention is described, and scope of the present invention can not be confined to this.
In a specific embodiment, the step of making middle plateform formula commutator of the present invention mainly comprises: cold extrusion step, punch steps, blanking step, shaping step, injection-compression molding step, groove milling and crotch step.To describe each step below:
The cold extrusion step: earlier copper coin is placed on the cold extrusion press that mould is installed, directly forward extrusion goes out to have the blank of the commutator of a plurality of protruding 14 or indent 14 ' on central axis hole 30, butt hook 12 blanks and the linkage section 11.The butt hook blank is described, the butt hook form of butt hook blank when bending, and perpendicular to linkage section 11 planes.
Punching course: copper coin is positioned in the pressing equipment through the commutator blank that cold extrusion forms, finally on the commutator base, forms hook 13,13 ' through punching press.
The blanking step: this step ground purpose is that copper material residual on needing commutator segment after process cold extrusion, the punch steps is removed, thereby forms the copper shell of flat converter, owing to this technology is known by those skilled in the art, so do not give unnecessary details.
The shaping step: this step ground purpose is the commutator casing behind the blanking to be carried out shaping, to guarantee the accuracy of final commutator product, owing to this technology is known by those skilled in the art, so do not give unnecessary details.
The injection-compression molding step: the commutator casing that manufacturing is obtained is positioned in compression moulding die, and injects phenolic moulding powder in the copper shell, the pressure injection plastic cement supporter that goes out to insulate.
Groove milling and crotch step: the purpose of this step is to form independent separately nonconducting commutator segment and suitable Close in the butt hook that connects windingNeed to prove, in the present invention, the meaning of described groove milling and crotch step is to comprise groove milling and two steps of crotch, and the order of two steps can be changed arbitrarily, promptly can first groove milling after crotch, also can first crotch after groove milling, because this technology is known by those skilled in the art, so do not give unnecessary details.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And conspicuous variation of being extended out thus or change still are among the protection range of the invention.
Claims (8)
1, a kind of flat converter, comprise the have central axis hole insulation support body (20) of (30), and the commutator body that is arranged at described supporter (20) end face, described commutator body comprises a plurality of commutator segments (10), each described commutator segment (10) includes butt hook (12) and contact-segment (11), it is characterized in that: described contact-segment (11) has a plurality of projectioies (14) or indent (14 ') towards a side of described supporter (20) end face, the area of section of described projection (14) reduces gradually towards the direction of described supporter (20), and the area of section of described indent (14 ') reduces gradually towards the inner direction of described contact-segment (11).
2, a kind of flat converter according to claim 1 is characterized in that: described projection (14) is the spike projection.
3, a kind of flat converter according to claim 1 is characterized in that: described indent (14 ') is the spike indent.
4, according to arbitrary described a kind of flat converter among the claim 1-3, it is characterized in that: described contact-segment (11) has a plurality of hooks (13,13 ') that bend into described supporter (20).
5, a kind of flat converter according to claim 4 is characterized in that: the described hook (13,13 ') on each commutator segment (10) is positioned at same footpath upwards with described butt hook (12).
6, a kind of method of making as the described flat converter of claim 1-5 may further comprise the steps:
1) cold extrusion step is carried out cold extrusion in mould, form the blank of the linkage section (11) with central axis hole (30) and commutator segment (10), is formed with several projectioies (14) or indent (14 ') on described linkage section (11);
2) blanking step forms the copper shell that is used to make flat converter with butt hook (12);
3) injection-compression molding step is positioned over described copper shell in compression moulding die, and to wherein injecting the insulation support body injection material, pressure injection goes out insulation support body;
4) groove milling and crotch step.
7, the method for manufacturing flat converter according to claim 6 is characterized in that: in the preceding step that described copper shell is carried out shaping that also comprises of step (3), make the copper shell of flat converter to form higher being used to of precision.
8, according to the method for claim 6 or 7 described manufacturing flat converters, it is characterized in that: after step (1), also comprise punch steps, to form the hook (13,13 ') on the described linkage section (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100841321A CN101242061A (en) | 2008-03-26 | 2008-03-26 | A flat converter and its making method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100841321A CN101242061A (en) | 2008-03-26 | 2008-03-26 | A flat converter and its making method |
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| Publication Number | Publication Date |
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| CN101242061A true CN101242061A (en) | 2008-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100841321A Pending CN101242061A (en) | 2008-03-26 | 2008-03-26 | A flat converter and its making method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904517A (en) * | 2014-03-27 | 2014-07-02 | 浙江松普换向器有限公司 | Hook-type commutator product, technology and mould |
-
2008
- 2008-03-26 CN CNA2008100841321A patent/CN101242061A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904517A (en) * | 2014-03-27 | 2014-07-02 | 浙江松普换向器有限公司 | Hook-type commutator product, technology and mould |
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Open date: 20080813 |