Commutator forming die

Abstract

The utility model provides a commutator forming die, and belongs to the technical field of dies. The commutator forming die comprises an upper die and a pressing piece. The upper die comprises an outer sleeve, an outer supporting sleeve is detachably arranged at the bottom end of the outer sleeve, the pressing piece penetrates through the top wall of the outer sleeve in a threaded connection mode and can abut against a pre-tightening spring, an inner supporting sleeve is arranged in the outer supporting sleeve in a sliding mode, and the inner supporting sleeve abuts against the bottom end of the pre-tightening spring. The outer sleeve and the outer supporting sleeve are detachably connected, and the two ends of the pre-tightening spring abut against and are detachably connected with the pressing piece and the inner supporting sleeve respectively, so that the pre-tightening spring can be conveniently detached and replaced, the replacement efficiency of the pre-tightening spring is improved, and the forming efficiency of the commutator is improved.

Description

Technical Field

[0001] This application relates to the field of molds, and more particularly, to a commutator forming mold. Background Art

[0002] A commutator, also known as a "commutator", is an important component on the armature of a DC motor and an AC commutator motor. It is composed of many copper sheets separated by mica sheets to form a cylindrical or disc shape, and each copper sheet is connected to a certain number of armature winding elements. When the armature rotates, the copper sheets successively come into contact with the fixed brushes. In a DC motor, the alternating current in the armature winding is converted into direct current between the brushes through the brushes and the commutator.

[0003] Due to the special shape of the hook of the hook-shaped commutator, a specific mold is required to punch the commutator during production to form the hook. When bending the hook shape of the commutator, a spring is arranged inside the upper die to apply a pre-tightening force to the commutator. For example, in a commutator forming mold that is easy to demold disclosed in Chinese Patent Publication No. CN221388609U, the pre-tightening spring is installed inside the outer sleeve. After long-term use, the spring expansion and contraction force decreases, and the decrease in the spring expansion and contraction force will cause the inner support sleeve not to rebound quickly after bending the commutator, which will affect the forming of the commutator. Therefore, the spring needs to be replaced regularly. However, it is more troublesome to replace the spring in the mold of this application, thus reducing the production efficiency of commutator forming. Summary of the Utility Model

[0004] To make up for the above deficiencies, this application provides a commutator forming mold, aiming to improve the problem that it is more troublesome to replace the spring in the mold, thus reducing the production efficiency of commutator forming.

[0005] An embodiment of this application provides a commutator forming mold, including an upper die and a pressing member.

[0006] The upper die includes an outer sleeve, the bottom end of the outer sleeve is detachably provided with an outer support sleeve, the pressing member is screwed through the top wall of the outer sleeve and can tightly abut against a pre-tightening spring, an inner support sleeve is slidably arranged inside the outer support sleeve, and the inner support sleeve tightly abuts against the bottom end of the pre-tightening spring.

[0007] In a specific implementation, a mounting plate is fixedly connected to the outer side of the bottom end of the outer sleeve, mounting grooves are formed in an annular array on the mounting plate, a connecting bolt is arranged inside each mounting groove, and the bottom end of each connecting bolt is screwed with the outer support sleeve.

[0008] In a specific implementation, a first square plate is fixedly connected to the bottom end of the pre-tightening spring, and a first square card slot matching the first square plate is formed at the top of the inner support sleeve.

[0009] In a specific embodiment, the pressing member includes a knob and a threaded rod. The top end of the threaded rod is fixedly connected to the knob. The bottom end of the threaded rod is screwed through the top wall of the outer sleeve and rotatably connected to a connecting block, and the connecting block is detachably connected to the top end of the preloading spring.

[0010] In a specific embodiment, the top end of the preloading spring is fixedly connected to a second square plate, and a second square card slot matching the second square plate is formed on the lower surface of the connecting block.

[0011] In a specific embodiment, an inner hexagonal portion is provided on the nut of the connecting bolt.

[0012] In a specific embodiment, a slider is fixedly connected to the outer side of the inner support sleeve, and a sliding groove matching the slider is formed on the inner wall of the outer support sleeve.

[0013] In a specific embodiment, a lower die is further included, and the lower die is arranged below the outer support sleeve.

[0014] Beneficial effects: Through the detachable connection of the outer sleeve and the outer support sleeve, and the detachable tight abutment of both ends of the preloading spring with the pressing member and the inner support sleeve respectively, it is convenient to disassemble and replace the preloading spring, improve the efficiency of replacing the preloading spring, and further improve the forming efficiency of the commutator. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a schematic structural diagram of a commutator forming die provided by an embodiment of the present application;

[0017] Figure 2 is a schematic structural diagram of an upper die provided by an embodiment of the present application;

[0018] Figure 3 is a schematic structural diagram of the connection relationship between a preloading spring and an inner lining sleeve provided by an embodiment of the present application;

[0019] Figure 4 is a schematic structural diagram of a pressing member provided by an embodiment of the present application;

[0020] Figure 5 is a schematic structural diagram of a lower die provided by an embodiment of the present application;

[0021] Figure 6 Provided for the embodiments of the present application Figure 2 The enlarged structural schematic diagram at position A in

[0022] In the figure: 1 - lower die; 2 - upper die; 21 - outer sleeve; 22 - outer support sleeve; 221 - chute; 3 - commutator; 4 - preloading spring; 41 - first square plate; 42 - second square plate; 5 - connecting bolt; 51 - hexagon socket part; 6 - pressing part; 61 - knob; 62 - threaded rod; 63 - connecting block; 631 - second square card slot; 7 - inner support sleeve; 71 - first square card slot; 8 - slider; 9 - cylinder; 10 - ejector plate. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0024] Please refer to Figures 1-6 , the present application provides a commutator forming die, including an upper die 2 and a pressing part 6.

[0025] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , the upper die 2 includes an outer sleeve 21, the bottom end of the outer sleeve 21 is detachably provided with an outer support sleeve 22, the pressing part 6 is screwed through the top wall of the outer sleeve 21 and can tightly abut against a preloading spring 4, an inner support sleeve 7 is slidably arranged inside the outer support sleeve 22, and the inner support sleeve 7 tightly abuts against the bottom end of the preloading spring 4. A slider 8 is fixedly connected to the outside of the inner support sleeve 7, and a chute 221 matching the slider 8 is opened on the inner wall of the outer support sleeve 22. Among them, when the preloading spring 4 needs to be replaced, first detach the outer support sleeve 22 from the bottom of the outer sleeve 21. At this time, the inner support sleeve 7 and the preloading spring 4 are directly separated, and then the preloading spring 4 can be taken out from the inside of the outer sleeve 21. Then replace the new preloading spring 4, put it into the inside of the outer sleeve 21, and then align the inner support sleeve 7 inside the outer support sleeve 22 with the bottom end of the preloading spring 4, and then connect the outer support sleeve 22 and the outer sleeve 21 to realize the replacement of the preloading spring 4. Through the detachable connection of the outer sleeve 21 and the outer support sleeve 22 and the detachable tight abutment of both ends of the preloading spring 4 with the pressing part 6 and the inner support sleeve 7 respectively, it is convenient to disassemble and replace the preloading spring 4, improve the replacement efficiency of the preloading spring 4, and further improve the forming efficiency of the commutator 3.

[0026] In this embodiment, a mounting plate is fixedly connected to the outer side of the bottom end of the outer sleeve 21. Mounting grooves are formed in the mounting plate in an annular array. A connecting bolt 5 is arranged inside each mounting groove, and the bottom end of each connecting bolt 5 is threadedly connected to the outer support sleeve 22. An internal hexagonal part 51 is arranged on the nut of the connecting bolt 5. Among them, when it is necessary to disassemble the outer sleeve 21 and the outer support sleeve 22, a screwdriver is placed into the internal hexagonal part 51 and rotated, so as to screw out each connecting bolt 5 in turn, and thus the disassembly and installation of the outer sleeve 21 and the outer support sleeve 22 can be realized.

[0027] In this embodiment, a first square plate 41 is fixedly connected to the bottom end of the pre-tightening spring 4. A first square card slot 71 matching the first square plate 41 is formed at the top of the inner support sleeve 7. The pressing member 6 includes a knob 61 and a threaded rod 62. The top end of the threaded rod 62 is fixedly connected to the knob 61. The bottom end of the threaded rod 62 is threadedly penetrated through the top wall of the outer sleeve 21 and rotatably connected to a connecting block 63, and the connecting block 63 is detachably connected to the top end of the pre-tightening spring 4. A second square plate 42 is fixedly connected to the top end of the pre-tightening spring 4. A second square card slot 631 matching the second square plate 42 is formed on the lower surface of the connecting block 63. Among them, through the mutual cooperation of the first square plate 41 and the first square card slot 71 and the second square plate 42 and the second square card slot 631, the pre-tightening spring 4 can be made to be tightly abutted and detachable while also increasing its stability when tightly abutted, thereby improving the stability of the commutator 3 during bending.

[0028] In this embodiment, it further includes a lower die 1, and the lower die 1 is arranged below the outer support sleeve 22. Among them, a cylinder 9 is installed inside the lower die 1. The output end of the cylinder 9 is fixedly connected to an ejector plate 10. The commutator 3 is arranged on the ejector plate 10. The inner support sleeve 7 and the outer support sleeve 22 are pressed and matched to realize the bending and forming of the commutator 3.

[0029] The working principle of this commutator forming die:

[0030] When it is necessary to replace the pre-tightening spring 4, first disassemble the outer support sleeve 22 from the bottom of the outer sleeve 21. At this time, the inner support sleeve 7 and the pre-tightening spring 4 are directly separated, and then the pre-tightening spring 4 can be taken out from the inside of the outer sleeve 21. Then, a new pre-tightening spring 4 is replaced and put into the inside of the outer sleeve 21. Then, the inner support sleeve 7 inside the outer support sleeve 22 is aligned with the bottom end of the pre-tightening spring 4, and then the outer support sleeve 22 is connected to the outer sleeve 21 to realize the replacement of the pre-tightening spring 4. Through the detachable connection of the outer sleeve 21 and the outer support sleeve 22 and the tight abutment and detachable connection of the two ends of the pre-tightening spring 4 with the pressing member 6 and the inner support sleeve 7 respectively, it is convenient to disassemble and replace the pre-tightening spring 4, improve the replacement efficiency of the pre-tightening spring 4, and thus improve the forming efficiency of the commutator 3.

[0031] It should be noted that the specific model and specification of the cylinder 9 need to be selected according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in the field, so it will not be elaborated in detail here.

[0032] The power supply and its principle of the cylinder 9 are clear to those skilled in the art, so they will not be elaborated here.

[0033] The above are only the embodiments of the present application and are not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

Claims

1. A commutator forming die, characterized in that, including an upper die (2) and a pressing member (6), the upper die (2) includes an outer sleeve (21), a detachable outer support sleeve (22) is provided at the bottom end of the outer sleeve (21), the pressing member (6) is screwed through the top wall of the outer sleeve (21) and can abut against a preloading spring (4), an inner support sleeve (7) is slidably arranged inside the outer support sleeve (22), and the inner support sleeve (7) abuts against the bottom end of the preloading spring (4).

2. The commutator forming die according to claim 1, characterized in that, A mounting plate is fixedly connected to the outer side of the bottom end of the outer sleeve (21), mounting grooves are formed in the mounting plate in an annular array, a connecting bolt (5) is arranged inside each mounting groove, and the bottom end of each connecting bolt (5) is screwed to the outer support sleeve (22).

3. A commutator forming die according to claim 1, characterized in that, A first square plate (41) is fixedly connected to the bottom end of the preloading spring (4), and a first square card slot (71) matching with the first square plate (41) is formed in the top of the inner support sleeve (7).

4. A commutator forming die according to claim 1, characterized in that, The pressing member (6) includes a knob (61) and a threaded rod (62), the top end of the threaded rod (62) is fixedly connected to the knob (61), the bottom end of the threaded rod (62) is screwed through the top wall of the outer sleeve (21) and is rotatably connected to a connecting block (63), and the connecting block (63) is detachably connected to the top end of the preloading spring (4).

5. A commutator forming die according to claim 4, characterized in that, A second square plate (42) is fixedly connected to the top end of the preloading spring (4), and a second square card slot (631) matching with the second square plate (42) is formed in the lower surface of the connecting block (63).

6. A commutator forming die according to claim 2, characterized in that, An inner hexagonal part (51) is arranged on the nut of the connecting bolt (5).

7. A commutator forming die according to claim 1, characterized in that, A slider (8) is fixedly connected to the outer side of the inner support sleeve (7), and a chute (221) matching with the slider (8) is formed in the inner wall of the outer support sleeve (22).

8. A commutator forming die according to claim 1, wherein, It further includes a lower die (1), and the lower die (1) is arranged below the outer support sleeve (22).

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