LU502149B1

LU502149B1 - Device for arrangement of commutator segments

Info

Publication number: LU502149B1
Application number: LU502149A
Authority: LU
Inventors: Jili Han
Original assignee: Taicang Libiao Intelligent Tech Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2022-06-21

Abstract

The invention includes a mould core, commutator segments, a mica sheet, and a limit body, where the mould core includes a mould core body, grooves, and protrusions, and is sleeved outside a limit shaft on the limit body; a bottom surface of the mould core is flush with an upper surface of a limit plate at the bottom of the limit body; the commutator segment is arranged in and matched with the groove; a clamping slot is formed in the middle of an outer edge of the protrusion; and the mica sheet between adjacent two of the commutator segments is matched with the clamping slot. The device for an arrangement of commutator segments of the present disclosure is simple in structure and convenient to assemble, and can achieve the positioning of the commutator segments and the mica sheet by means of the limit body and the clamping slot.

Description

DESCRIPTION LUS02149

DEVICE FOR ARRANGEMENT OF COMMUTATOR SEGMENTS

TECHNICAL FIELD The present disclosure belongs to the technical field of arrangement of commutator segments, and particularly relates to a device for an arrangement of commutator segments.

BACKGROUND Commutators are key components of armatures of DC motors or AC commutator motors, are composed of a plurality of commutator segments and a base, and can achieve the effect of commutation during operation of the motors. The base is typically made from bakelite powder by injection moulding at a high temperature. For the purpose of embedding the commutator segments into the base, it is necessary to arrange the commutator segments first. After that, a next procedure, namely the injection moulding, can be performed. Currently, due to imperfect design and process of the mould core for arrangement of the commutator segments, the commutator segments may be irregularly arranged on a plastic sleeve in the axial direction. As a result, unqualified products are prone to being generated, and the commutator segments are likely to be lacking or disengaged. Besides, thin mica sheets may deflect when each is inserted between two commutator segments. In this case, the commutator segments deflect along with the mica sheets. Consequentially, the quality of finished commutators is affected.

SUMMARY The objective of the present disclosure is to settle the above issues by providing a device for an arrangement of commutator segments. The device is simple in structure and convenient to assemble, and can achieve the accuracy in positioning of commutator segments and mica sheets, thereby improving the accuracy in assembly, the product performance stability, and the production efficiency. The present disclosure adopts the following technical solutions: a device for an arrangement of commutator segments includes a mould core, commutator segments, mica sheets, and a limit body, where the mould core includes a mould core body, grooves, and protrusions, and is sleeved outside a limit shaft on the limit body; a bottom surface of the mould core is flush with an upper surface of a limit plate at the bottom of the limit body; the commutator segment is arranged in and matched with the groove; a clamping slot is formed in the middle of an outer edge of the protrusion; and the mica sheet between adjacent two of the commutator segments is matched with the clamping slot. The commutator segment and the mica sheet are axially restricted by the limit body, and the mica 4222149 can be fixed more firmly via the clamping slot to prevent from dislocation, which may otherwise cause electric shock between every two adjacent commutator segments. Accordingly, the commutator segment can be arranged more accurately. Further, the groove as well as the protrusion is uniformly distributed at the periphery of the mould core. Further, the groove is bottle-shaped, and the protrusion is T-shaped. Further, turnings of an opening and a body of each bottle-shaped groove are rounded, facilitating arrangement of the commutator segment and moulding of the mould core. Further, a cylindrical through hole concentrically in transition fit with the limit shaft is formed along a vertical center line of the mould core body, and the limit body can be adapted to different mould cores with the same aperture. Further, the mould core is flush with or higher than the limit shaft. Further, the limit plate has an outer diameter larger than that of an area defined by the commutator segments. Further, the mould core is made from a plastic by injection moulding. It can be seen from the above technical solutions that the present disclosure has the following beneficial effects:

1. the commutator segments are axially restrained by the limit body to prevent from lacking and disengagement, so that the accuracy in the assembly and the product performance stability are improved; and

2. the mica sheets can be fixed more firmly by the limit body via the clamping slots to prevent from dislocation, which may otherwise cause electric shock between every two adjacent commutator segments. Accordingly, the commutator segments can be arranged more accurately, and the product performance stability is further improved. In conclusion, the device for an arrangement of commutator segments of the present disclosure is simple in structure and convenient to assemble, and can achieve the accuracy in the positioning of the commutator segments and the mica sheets, thereby improving the accuracy in the assembly, the product performance stability, and the production efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural diagram of a device for an arrangement of commutator segments of the present disclosure; FIG. 2 is a front view of the device for an arrangement of commutator segments of the present disclosure; LU502149 FIG. 3 is a structural diagram of a limit body of the device for an arrangement of commutator segments of the present disclosure; FIG. 4 is a structural diagram of a mould core of the device for an arrangement of commutator segments of the present disclosure; and FIG. 5 1s a partial enlarged view of part À of the mould core of the device for an arrangement of commutator segments of the present disclosure. Reference numerals: 1. mould core, 11. mould core body, 12. groove, 13. protrusion, 131. clamping slot, 14. through hole, 2. commutator segment, 3. mica sheet, 4. limit body, 41. limit shaft, 42. limit plate.

DETAILED DESCRIPTION OF THE EMBODIMENTS The following describes the present disclosure in more detail with reference to accompanying drawings and specific embodiments. The embodiments of the present disclosure are described below in detail. Examples of the embodiments are shown in the drawings. The same or similar numerals represent the same or similar elements or elements having the same or similar functions throughout the specification. The embodiments described below with reference to the drawings are illustrative, which are merely intended to explain the present disclosure, rather than to limit the present disclosure. It should be understood that, in the description of the present disclosure, the terms such as "central", "longitudinal", "transverse", "long", "wide", "thick", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise" and "anticlockwise" are intended to indicate orientations or positional relations shown in the drawings. It should be noted that these terms are merely intended to facilitate a simple description of the present disclosure, rather than to indicate or imply that the mentioned apparatus or elements must have the specific orientation or be constructed and operated in the specific orientation. Therefore, these terms may not be construed as a limitation to the present disclosure. Moreover, the terms such as "first" and "second" are used only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features denoted. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specifically defined, "a plurality of" means two or more. In the present disclosure, unless otherwise clearly specified and defined, the terms "provided", "connected with", "connected to", and "fixed" should be understood in a broad sense. For example,

the connection may be a fixed connection, a detachable connection or an integrated connection, fH202149 be a mechanical connection or an electrical connection, may be a direct connection or an indirect connection with use of an intermediate medium, or may be intercommunication between two components.

Those of ordinary skill in the art may understand specific meanings of the above terms in the present disclosure based on a specific situation.

In the present disclosure, unless otherwise expressly specified and defined, that a first feature is "above" or "under" a second feature may include that the first feature is in direct contact with the second feature, or that the first feature and the second feature are not in direct contact with each other but are in contact by using another feature between them.

In addition, that the first feature is "over", "above", and "on" the second feature includes that the first feature is directly above and diagonally above the second feature, or simply indicates that a horizontal height of the first feature is larger than that of the second feature.

The case where the first feature is "beneath", "below", and "under" the second feature includes that the first feature is directly below and diagonally below the second feature, or simply indicates that the altitude of the first feature is lower than that of the second feature.

Embodiment 1

As shown in FIG. 1 to FIG. 5, a device for an arrangement of commutator segments of the present disclosure includes a mould core 1, commutator segments 2, mica sheets 3, and a limit body 4, where the mould core 1 includes a mould core body 11, grooves 12, and protrusions 13, and is sleeved outside a limit shaft 41 on the limit body 4; a bottom surface of the mould core 1 is flush with an upper surface of a limit plate 42 at the bottom of the limit body 4; the commutator segment 2 is arranged in and matched with the groove 12; a clamping slot 131 is formed in the middle of an outer edge of the protrusion 13; and the mica sheet 3 between adjacent two of the commutator segments 2 is matched with the clamping slot 131. The commutator segment 2 and the mica sheet 3 are axially restricted by the limit body 4, and the mica sheet 3 can be fixed more firmly via the clamping slot 131 to prevent from dislocation, which may otherwise cause electric shock between every two adjacent commutator segments 2. Accordingly, the commutator segment 2 can be arranged more accurately.

Embodiment 2

As shown in FIG. 1 to FIG. 5, the device for an arrangement of commutator segments of the present disclosure includes the mould core 1, the commutator segments 2, the mica sheets 3, and the limit body 4, where the mould core 1 includes the mould core body 11, the grooves 12, and the protrusions 13, and is sleeved outside the limit shaft 41 on the limit body 4; the bottom surface of the mould core 1 is flush with the upper surface of the limit plate 42 at the bottom of the limit body 4; the commutator segment 2 is arranged in and matched with the groove 12; the clamping slot 131 is formed in the middle of the outer edge of the protrusion 13; and the mica sheet 3 between adjàcé?R2149 two of the commutator segments 2 is matched with the clamping slot 131. The commutator segment 2 and the mica sheet 3 are axially restricted by the limit body 4, and the mica sheet 3 can be fixed more firmly via the clamping slot 131 to prevent from dislocation, which may otherwise cause the electric shock between every two adjacent commutator segments 2. Accordingly, the commutator segment 2 can be arranged more accurately. The groove 12 as well as the protrusion 13 is uniformly distributed at the periphery of the mould core

1. The groove 12 is bottle-shaped, and the protrusion 13 is T-shaped. Turnings of an opening and a body of each bottle-shaped groove 12 are rounded, facilitating arrangement of the commutator segment 2 and moulding of the mould core 1. A cylindrical through hole 14 concentrically in transition fit with the limit shaft 41 is formed along a vertical center line of the mould core body 11, and the limit body can be adapted to different mould cores with the same aperture. The mould core 1 is flush with or higher than the limit shaft 41. The limit plate 42 has an outer diameter larger than that of an area defined by the commutator segments 2. The mould core 1 is made from a plastic by injection moulding. The operating principle of the device for an arrangement of commutator segments of the present disclosure is as follows: The commutator segments are arranged in the following approach: firstly, the limit shaft 41 for limiting the mould core 1 on the limit body 4 is embedded into the mould core 1; then the commutator segments 2 are inserted into the grooves 12 and abut against the limit plate 42 to be circumferentially arranged on the mould core 1; and finally, the mica sheets 3 are inserted into the clamping slots 131 each corresponding to a position midway between every two adjacent commutator segments 2. In this way, the mica sheet 3 is located between every two adjacent commutator segments 2. The above described are merely preferred implementations of the present disclosure. It should be noted that for a person of ordinary skill in the art, several improvements may further be made without departing from the principle of the present disclosure, but such improvements should also be deemed as falling within the protection scope of the present disclosure.

Claims

CLAIMS LU502149

1. A device for an arrangement of commutator segments, comprising a mould core (1), commutator segments (2), mica sheets (3), and a limit body (4), wherein the mould core (1) comprises a mould core body (11), grooves (12), and protrusions (13), and is sleeved outside a limit shaft (41) on the limit body (4); a bottom surface of the mould core (1) 1s flush with an upper surface of a limit plate (42) at a bottom of the limit body (4); the commutator segment (2) is arranged in and matched with the groove (12); a clamping slot (131) 1s formed in a middle of an outer edge of the protrusion (13); and the mica sheet (3) between adjacent two of the commutator segments (2) is matched with the clamping slot (131).

2. The device for an arrangement of commutator segments according to claim 1, wherein the groove (12) as well as the protrusion (13) 1s uniformly distributed at a periphery of the mould core.

3. The device for an arrangement of commutator segments according to claim 2, wherein the groove (12) is bottle-shaped, and the protrusion (13) is T-shaped.

4. The device for an arrangement of commutator segments according to claim 3, wherein turnings of an opening and a body of each said bottle-shaped groove (12) are rounded.

5. The device for an arrangement of commutator segments according to claim 1, wherein a cylindrical through hole (14) is concentrically in transition fit with the limit shaft (41) and is formed along a vertical center line of the mould core body (11).

6. The device for an arrangement of commutator segments according to claim 1, wherein the mould core (1) is flush with or higher than the limit shaft (41).

7. The device for an arrangement of commutator segments according to claim 1, wherein the limit plate (42) has an outer diameter larger than an outer diameter of an area defined by the commutator segments (2).

8. The device for an arrangement of commutator segments according to claim 1, wherein the mould core (1) is made from a plastic by injection moulding.