KR100407878B1 - METHOD FOR MANUFACTURING REFINER JARING FOR COMMEMORATORS - Google Patents

Abstract

It is possible to securely fix the commutator member in the insulator without damaging the usable thickness or strength of the commutator member.

A method of manufacturing a commutator ring for a commutator of an electric device, comprising the steps of: forming a commutator element of a commutator ring by a band-like material; and fixing means of a commutator element in an insulator, and then assembling a selectable number of commutator elements to form a commutator ring The fixing means 18 is constituted as an interrupted dove tail shaping portion 22 extending in the axial direction of the commutator element 12. [

Description

METHOD FOR MANUFACTURING COMMUNICATOR RING FOR COMMEMORATOR

A method of manufacturing a commutator ring for a commutator of an electric device, comprising the steps of: forming a commutator element of a commutator ring by a band-like material and a fixing means of a commutator element in an insulator; To form a ring. The present invention also relates to a commutator manufactured using such a commutator ring.

It is a well-known fact that a commutator ring for a so-called cylindrical commutator is manufactured from pre-stamped band material. In this case, the grooves are formed by using a forming tool in a direction perpendicular to the interlocking direction of the material to the formed endless belt, having a width corresponding to the axial length of the commutator, Only the joined commutator segments are obtained through the web. Depending on the number of commutator segments of the commutator ring, a corresponding number of commutator segments are detached from the currently formed continuous material and are formed into a commutator ring. In order to stabilize the commutator ring and to mutually insulate the commutator segments, the commutator ring is, in most cases, filled into the insulating material material with a metallic boss.

It is a well-known fact that a fixing means for engaging with an insulating material material is provided on the commutator element in order to prevent the commutator element from shifting in the axial direction when used as prescribed by the commutator ring after being filled.

For example, as the commutator having the commutator ring disclosed in the specification of the Federal Examination Patent Application No. 1218053, the commutator element is integrally sheared or clicked into the commutator element. The disadvantage of this case is that the integral shearing of the click or jam reduces the available commutator element thickness or strength of the commutator ring.

Also, based on the specification of U.S. Patent No. 5204574, the known commutator ring has a dove tail shaping portion extending in the axial direction of the commutator element. The fixation of the commutator pieces that can be placed in the radial direction of the commutator is guaranteed by using the known dove tail shaping section, but it is impossible to exclude the deviation of the commutator in the axial direction.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to make it possible to reliably fix commutator members in an insulator without damaging the thickness or strength of the commutator pieces that can be used.

In order to solve the above problem, in the method of the present invention described in claim 1, the fixing means is constituted as an interrupted dove tail shaping portion extending in the axial direction of the commutator element.

Further, as a configuration of the commutator according to the present invention as set forth in claim 8 for solving the above problems, there is provided a commutator ring comprising a commutator element arranged side by side across the entire circumference, and the commutator element is fixed to the insulator through a fixing means In the commutator of the electric machine of the type, the fixing means is constituted as a stopped dove tail shaping part.

1 is a sectional view showing a commutator ring;

2 is a plan view showing a cross section of a commutator ring;

3 is an enlarged view of a part of a commutator ring;

Figure 4 shows a forming tool for producing a fixing means according to the invention.

5 is a perspective view schematically showing a manufacturing step of the fixing means according to the present invention.

6 is a sectional view showing a commutator having a commutator ring shown in Fig.

DESCRIPTION OF THE REFERENCE NUMERALS

10: commutator ring 11: insulator

12: commutator 13: commutator

14,16: Angle 18: Fixing means

22: forming part 24, 26:

28: end face, end 30: molding material

32: notch 34: material

36: web 38: side

42: mold pressing tool 44: supply part

46: Joe.

Next, embodiments of the present invention will be described with reference to the drawings.

1 and 2, the commutator ring as a whole indicated by reference numeral 10 is composed of a plurality of commutator segments 12 arranged in a ring shape. These commutator segments 12 have an L-shape Have. The commutator segments 12 have long angles 14 in the above case and the outer surfaces of these corners 14 form a rotating surface Lafflaeche of the commutator ring 10. Also, a short angle 16 is provided, and this angle 16 acts for contact connection of the commutator element 12. The commutator segments 12 are provided with fastening means 18 on the inside of the angles 14 and the commutator segments 12 are connected to the bosses 12 of the commutator ring 10, And is fixed to the insulator 11 shown in Fig. Thus, the commutator 13 formed as shown in Fig. 6 is provided on the rotor shaft of the electric machine, and is finally contact-connected to the coil of the rotor.

The commutator ring is partially enlarged in Fig. In the following, the angle 16 as the connection point is not shown in Fig. 3, as it refers to the manufacture of the fastening means 18 according to the invention. 3, the securing means 18 is constructed integrally with the angle 14 of the commutator element 12. The angle? The fastening means 18 has a dove tail shaping portion 22 extending radially inward, viewed in cross section. As is apparent from the enlarged view shown in Fig. 3, the individual commutator segments 12 are spaced apart from each other and do not have direct contact contacts. Since the intermediate chamber 20 is filled with the insulating material of the insulator 11, the electrical insulation between the commutator segments 12 is assured.

At the same time, the fixing means 18, i.e., the dove tail shaping portion 22, is joined to this insulating material. The dove tail shaping section 22 is configured to be interrupted in the longitudinal direction of the commutator element 12 and eventually in the axial direction of the commutator ring 10. [ The stopped dove tail shaping section 22 refers to the section 24 having the dove tail shaping section 22 and the section 26 having the dove tail shaping section 22 as viewed from the longitudinal direction of the commutator element 12 ) Are alternately provided. The number of divisions 24 (26) over the length of the commutator segments 12 is selectable. For example, according to the first embodiment, one segment 24 and one segment 26 are provided for each commutator segment, and according to another embodiment, a relatively large number of segments 24, Are alternately provided. In the embodiment shown in Fig. 5, each of the segments 24 provided with the dovetail-shaped forming portions 22 is formed in the end region of the angle 14 of the commutator segments 12, The intermediate part located between the end sections forms the section 26 without the dovetail shaping section.

The commutator segments 12 are provided with a transverse section 28 which is a constituent part of the securing means 18 in its transitional section by mutually located segments 24;

The constitution and the end or the end face 28 of the dove tail shaping portion 22 as a whole ensure reliable fixation of the commutator element 12 in the insulating material. As a result, the undercut of the dovetail-shaped forming portion 22 ensures the fixation of the commutator ring 10 in the radial direction, and the fixing of the commutator ring 10 in the axial direction Is guaranteed. Hereinafter, the manufacturing of the commutator ring 10 will be described in detail with reference to Figs. 4 and 5. Fig. Fig. 5 schematically shows the individual manufacturing steps of the commutator segments 12. Fig. In order to simplify the drawing, only the angle 14 of the commutator element 12 is shown in Fig.

The commutator 12 is usually die-press-molded from a molded base material 30 made of copper. Therefore, in the first method step, a notch 32 is made using a forming tool in the direction perpendicular to the longitudinal direction of the molding material 30, over the forming stock 30. The material 34 of the commutator segments 12 is formed by the notches 32 provided at mutually spaced intervals. By the configuration of the forming tool to make the notches 32 which are only joined together through the web 36, the material 34 has a trapezoidal shape in cross section, 38 extend at mutually selectable angles. 5, the forming tool 40 shown by the arrow only acts perpendicular to the forming material 30 in this case.

In the next method step portion, the dovetail shaping portion 22 is integrally press-formed on the workpiece 34. [ To this end, a tongue-shaped pushing tool 42 engages with the side surface 38, that is, on the side of the material 34 on both sides. 5 has a corresponding contour over the width of the molding material 30 extending in the longitudinal direction of the commutator element 12. The shape of the pressing tool 42 has a corresponding contour, Thereby assuring the formation of the segment 24 with the dove tail shaping 22 and the segment 26 without the dove tail shaping. Because of this, the die pressing tool 42 may have a jaw 46 that has a corresponding pitch or tee, so as to cooperate with the side 38, and the jaws 46, And are guided together on opposite sides 38 of the commutator segment 12. [ Corresponding to the pitch and spacing of the jaws, the number of alternatingly located segments 24, 26 is adjusted. After completion of the die press-forming process, the commutator segments 12, in particular the corners 14 having the structure shown in Figs. 2 and 3, are produced. In the above case, the same members are denoted by the same reference numerals, and the description of the same members is omitted here.

A selectable number of commutator segments 12 are cut off from the molding material 30 after the molding or die press forming of the commutator segments 12 which are now coupled to each other through the web 36, (10). In the above case, the commutator element 12 is fixed to the insulating material in the fixing means 18 as described above. Next, the commutator element 12 is cut off on its outer side by removing the engaging web 36 by a cutting process, for example, a cutting process. The commutator thus manufactured is shown in Fig.

4 shows a die pressing tool 42 in a sectional view, and die pressing molding of the dove tail forming portion 22 is performed by using the die pressing tool 42. As shown in Fig. The detailed configuration of the mold-pressing tool 42, particularly the mechanical engaging portion and the driving portion of the mold-pressing tool 42, will not be described. The mold pressing tool 42 is provided with a supply section 44. A molding material 30 having a notch 32 is injected into the supply section 44 in advance. The pressing tool 42 has a pivotally mounted jaw 46 which corresponds to the principle diagram shown in Figure 5 and at the same time is engaged laterally on the side 38 of the blank 34 . The turning engagement of the tongue-guided jaws 46 is adjusted so that the dovetail shaping portion 22 is molded in this case.

The commutator ring 10 of the commutator ring 10 can be replaced by the constitution of the fixing means 18 in the transverse section of the commutator element 12 according to the manufacturing method according to the present invention as a whole It is possible to manufacture it so as not to be damaged. By virtue of the integral stamping of the dovetail shaping section 22, the material is simply pushed back, with the result that the cross section does not become thinner or weaker over its entirety. At the same time, the following facts are achieved using simple practical production steps. In other words, in the above case, the fixing means 18 can be constituted to guarantee reliable fixation even if it is in the axial direction even in the radial direction of the commutator element. And the sections 24 and 26 located at mutually alternate positions of the commutator segments 12 also ensure that the strength of the commutator segments 12 and finally the bending strength of the commutator ring 10 It is guaranteed.

The configuration according to the present invention makes it possible to securely fix the commutator member in the insulator while maintaining the thickness or strength of the commutator piece that can be used. Since the fastening means is constructed as an interrupted dove tail shaping portion extending in the axial direction of the commutator element, the commutator element can be formed in a desired shape, in a radial and / or axial direction It is possible to impart a favorable shape to the insulator so as to reliably fix the commutator element to the insulator. Particularly, an undercut extending in the axial direction, which is effective for preventing the deviation in the axial direction, can be obtained between the fixing means of the commutator element and the insulating material by the dove tail shaping portion interrupted in the axial direction .

Other advantageous arrangements of the invention are set forth in the other claims of the claims.

Claims (10)

A method of manufacturing a commutator ring for an electric device commutator for a type of electric device commutator in which a commutator element of a commutator ring is formed of a strip-like material and a fixing means of a commutator element in an insulator is formed, and then a selectable number of commutator elements are assembled to form a commutator ring , Characterized in that the fastening means (18) is constructed as an interrupted dove tail shaping section (22) extending in the axial direction of the commutator element (12). The method of manufacturing a commutator ring according to claim 1, characterized in that the interrupted pigeon tail shaping part (22) is integrally formed with the commutator element (12) in one working process. 3. The method according to claim 1 or 2, characterized in that the dove tail shaping section (22) is constructed using at least one forming tool (42) which laterally engages the side surface (38) of the commutator element Wherein the commutator ring comprises a plurality of commutator rings. 4. The method of manufacturing a commutator ring according to claim 3, characterized in that the forming tool (42) is simultaneously engaged with the mutually facing side surface (38) of the commutator element (12). 4. A method according to claim 3, wherein through the lever device, two or more guidable guideways (46) guided together by the tongue of the forming tool (42) are guided towards the side (38). The jogger according to claim 5, characterized in that a plurality of jaws (46) are positioned back and forth with respect to one another in the axial direction of the commutator element (12) and simultaneously guided to the side surface (38) of the commutator element Of the commutator ring. 6. A method according to claim 5, wherein the axial spacing of the jaws (46) adjusts the rate of interruption of the dovetail shaping section (22). A commutator of an electric device of the type in which a commutator ring composed of commutator pieces arranged in parallel to each other around the entire circumference is provided and the commutator element is fixed to the insulator (11) through a fixing means, Characterized in that the fastening means (18) is configured as an interrupted dove tail shaping section (22). 9. The device according to claim 8, characterized in that the fastening means (18) comprises, for each commutator segment (12), one or more segments (24) with a dove tail shaping portion (22) (26). The commutator of the electric device according to claim 1, The commutator of an electric device according to claim 8 or 9, characterized in that the segments (24, 26) of the commutator element (12) are mutually shifted in an axial cross section (28).