Hook-type commutator with high connection strength

Abstract

The utility model relates to the technical field of commutators, in particular to a hook-type commutator with high connection strength, which comprises a bakelite powder body, a plurality of commutator segments are embedded on the bakelite powder body, each commutator segment comprises a segment body, the middle section of one end of the segment body is provided with an extending end, two sides of the segment body are bent towards the same surface to form two bent combinations, and the two bent combinations are respectively provided with a hook-shaped groove. Each bending combination comprises a first vertical section, an inner bending section, a second vertical section and an outer bending section, the inner bending section is bent from one side of the first vertical section, the outer bending section is bent from one side of the second vertical section, a T-shaped cavity is formed between the two bending combinations, and the inner bending section, the second vertical section and the outer bending section jointly form a hook cavity. The T-shaped cavity and the hook cavity are filled with bakelite powder bodies, the sheet body is obtained through stamping, the first vertical section, the inwards-bent section, the second vertical section and the outwards-bent section are all obtained by bending the two sides of the sheet body, the outer contour main body is obtained through stamping and bending the sheet body, and the advantages of large-scale production and manufacturing and low cost are achieved.

Description

Technical Field

[0001] This application relates to the field of commutator technology, and more specifically to a hook-type commutator with high connection strength. Background Technology

[0002] The commutator is an important component of the armature of DC motors and AC commutator motors. Its main structure consists of multiple commutator copper plates mounted on a commutator bracket. Each commutator copper plate is connected to several armature winding elements. When the armature rotates, the commutator copper plates successively come into contact with fixed brushes.

[0003] Patent document (CN219917851U) discloses a commutator segment for a hook-type commutator, including a body part 1, a dovetail part 2, and a connecting part 3 connecting the body part 1 and the dovetail part 2. The body part 1 has a first groove 11 extending through its length direction on its left and right sides respectively. In the projection of a plane perpendicular to the length direction of the body part 1, the dovetail part 2 has at least one second groove 21 extending through its length direction on its left and right sides respectively. The connecting part 3 has an opening 31, which has high connection strength with the bakelite powder body. However, the structure of its dovetail part and the connecting part is complex and difficult to obtain by stamping. The overall contour of the dovetail part and the connecting part can be obtained by milling. Since multiple commutator segments are required on a single commutator, the processing cost is high if the outer contour of each commutator segment is obtained by milling in the mass production of commutators.

[0004] Therefore, there is a need for a hook-type commutator with high connection strength, whose outer contour body is obtained by stamping and bending sheet bodies, which has a low mass production cost. Utility Model Content

[0005] The main objective of this application is to provide a hook-type commutator with high connection strength. The hook-type commutator includes a bakelite powder body with multiple commutator segments arranged in a circular array on the bakelite powder body. Each commutator segment includes a sheet body with an extension end at one end. The extension end is bent at a predetermined angle to form a winding portion. Both sides of the sheet body are bent at a predetermined angle towards the same surface to form a double-bend combination. Each double-bend combination includes a first vertical segment, an inner bend segment, a second vertical segment, and an outer bend segment. The inner bend segment extends from one side of the first vertical segment towards the width of the commutator segment. The outer fold segment bends at a predetermined angle in the upward middle direction. The outer fold segment bends at a predetermined angle from the side of the second vertical segment away from the inner fold segment towards the middle direction away from the width of the commutator segment. There is a T-shaped cavity with an opening between the two bending combinations. The inner fold segment, the second vertical segment, and the outer fold segment together form a hook cavity. Both the T-shaped cavity and the hook cavity are filled with the bakelite powder body. The first vertical segment, the inner fold segment, the second vertical segment, and the outer fold segment are all obtained by bending the two sides of the sheet body. Compared with the prior art, it has the advantages of obtaining the outer contour body by stamping and bending the sheet body and having a lower mass production manufacturing cost.

[0006] Another objective of this application is to provide a hook-type commutator with high connection strength, wherein the sheet body has an original thick layer, a transition layer, and a half-thick layer, the thickness of the original thick layer, the transition layer, and the half-thick layer decreasing sequentially, the two sides of the transition layer being connected to the original thick layer and the half-thick layer respectively, the extension end being made of the original thick layer, the first vertical section being made of the original thick layer, the transition layer, and the half-thick layer together, and the inner fold section, the second vertical section, and the outer fold section being made of the half-thick layer, thereby reducing material usage by making the inner fold section, the second vertical section, and the outer fold section all of the half-thick layer.

[0007] To achieve at least one of the above-mentioned objectives, this application provides a hook-type commutator with high connection strength, wherein the hook-type commutator with high connection strength includes:

[0008] A bakelite powder body has multiple commutator segments arranged in a ring array on it. Each commutator segment includes a body with an extension end at one end of its middle section. The extension end is bent at a predetermined angle to form a winding portion. Both sides of the body are bent at predetermined angles to the same surface to form a double-bend combination. Each double-bend combination includes a first vertical segment, an inner bend segment, a second vertical segment, and an outer bend segment. The inner bend segment is bent at a predetermined angle from one side of the first vertical segment toward the middle section of the commutator segment's width direction. The outer bend segment is bent at a predetermined angle from the side of the second vertical segment opposite to the inner bend segment toward the middle section of the commutator segment's width direction. There is an open T-shaped cavity between the two double-bend combinations. The inner bend segment, the second vertical segment, and the outer bend segment together form a hook cavity. Both the T-shaped cavity and the hook cavity are filled with the bakelite powder body.

[0009] In one or more embodiments of this application, the sheet body has an original thickness layer, a transition layer, and a half-thickness layer, the thickness of the original thickness layer, the transition layer, and the half-thickness layer decreasing sequentially, the two sides of the transition layer being connected to the original thickness layer and the half-thickness layer respectively, the extension end being made of the original thickness layer, the first vertical segment being made of the original thickness layer, the transition layer, and the half-thickness layer together, and the inner folded segment, the second vertical segment, and the outer folded segment being made of the half-thickness layer.

[0010] In one or more embodiments of this application, both ends of the semi-thick layer have a groove. The groove extends a predetermined distance from both ends of the slice to the middle section of the slice. The hook-type commutator with high connection strength includes two insulating rings. The two insulating rings are respectively sleeved on both ends of each commutator slice, and the insulating rings are located in the groove. When the insulating ring is placed in the groove, the bakelite powder body fills the groove opening.

[0011] In one or more embodiments of this application, the first vertical segment has a plurality of spaced-apart first through holes, and the second vertical segment has a plurality of spaced-apart second through holes, and both the first through holes and the second through holes are filled with the bakelite powder body.

[0012] In one or more embodiments of this application, a second through hole is provided between each pair of adjacent first through holes.

[0013] In one or more embodiments of this application, the center of the bakelite powder body has a through hole.

[0014] In one or more embodiments of this application, the bakelite powder body is arranged in a ring array around its circumference with a plurality of partition grooves, and a partition groove is provided between each pair of adjacent commutator segments.

[0015] In this embodiment, the high-strength hook-type commutator includes a bakelite powder body with multiple commutator segments embedded thereon. Each commutator segment includes a body with an extended end at one end. Both sides of the body are bent at a predetermined angle towards the same surface to form a double-bend combination. Each double-bend combination includes a first vertical segment, an inner bend segment, a second vertical segment, and an outer bend segment. The inner bend segment bends at a predetermined angle from one side of the first vertical segment towards the middle of the commutator segment's width direction. The outer bend segment extends away from the inner bend segment from the second vertical segment. One side of the segment is bent at a predetermined angle away from the middle section in the width direction of the commutator segment. The two bends together form a T-shaped cavity with an opening. The inner bend, the second vertical segment, and the outer bend together form a hook cavity. Both the T-shaped cavity and the hook cavity are filled with bakelite powder. The sheet body is obtained by stamping. The first vertical segment, the inner bend, the second vertical segment, and the outer bend are all obtained by bending the two sides of the sheet body. Compared with the existing technology, it has the advantages of obtaining the outer contour body by stamping and bending the sheet body and lower manufacturing cost for mass production. Attached Figure Description

[0016] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein:

[0017] Figure 1 The figure shows a structural schematic diagram of a hook-type commutator with high connection strength according to this application from a certain perspective;

[0018] Figure 2 The diagram illustrates the structure of the commutator segment;

[0019] Figure 3 The diagram shows... Figure 1 A magnified view of a portion at point C;

[0020] Figure 4 The illustration shows a structural schematic diagram of a hook-type commutator with high connection strength from another perspective. Detailed Implementation

[0021] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.

[0022] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0023] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0025] This illustration shows a hook-type commutator with high connection strength. (Reference) Figures 1 to 4 According to a preferred embodiment of the present invention, a hook-type commutator with high connection strength is provided, such as... Figure 1 As shown, it includes a bakelite powder body 10, on which multiple commutator segments 20 are arranged in a ring array, such as... Figure 2 and Figure 3 As shown, each commutator segment 20 includes a body 201. One end of the body 201 has an extension end 2011 at its middle section. The extension end 2011 is bent at a predetermined angle to form a winding portion, on which a wire is wound. Both sides of the body 201 are bent at a predetermined angle towards the same surface to form a double-bend combination 2012. Each double-bend combination 2012 includes a first vertical segment 20121, an inner bend segment 20122, a second vertical segment 20123, and an outer bend segment 20124. The inner bend segment 20122 extends from one side of the first vertical segment 20121 towards the... The commutator segment 20 is bent at a predetermined angle in the middle direction of its width. The outer fold segment 20124 is bent at a predetermined angle from the side of the second vertical segment 20123 away from the inner fold segment 20122 in the direction away from the middle direction of the commutator segment 20 in its width. There is a T-shaped cavity 2013 with an opening between the two bending combinations 2012. The inner fold segment 20122, the second vertical segment 20123 and the outer fold segment 20124 together form a hook cavity 2014. The T-shaped cavity 2013 and the hook cavity 2014 are both filled with the bakelite powder body 10.

[0026] It should be noted that the overall outline of the commutator segment 20 is a sheet of material with a certain thickness before forming. After the extension end 2011 is obtained by punching, the winding part is formed by bending the extension end 2011 towards the other end of the commutator segment 20 at an obtuse angle. The first vertical segment 20121 is formed by bending both sides of the segment body 201 towards the same plane at nearly 90°. The inner folded segment 20122 is obtained by bending the middle section of the first vertical segment 20121 towards the middle section of the width direction of the segment body 201 at nearly 90°. The inner folded segment 20122 is then bent at nearly 90° away from the segment body 201 to obtain the second vertical segment 20123. The outer folded segment 20124 is obtained by bending the second vertical segment 20123 towards the middle section of the width direction of the commutator segment 20 at an obtuse angle. As can be seen, the above process involves stamping to obtain a sheet of a predetermined shape, and then bending to obtain the extension end 2011 and the bending assembly 2012. In addition, when the bakelite powder is dried and pressed to form the bakelite powder body 10, the bakelite powder fills the T-shaped cavity 2013 and the hook cavity 2014, which can effectively prevent the commutator 20 from detaching from the bakelite powder body 10 under the action of centrifugal force. Compared with the prior art, it has the advantages of obtaining the outer contour body by stamping and bending sheet body and lower manufacturing cost for mass production.

[0027] Furthermore, to save materials and facilitate bending, such as Figure 2 and Figure 3 As shown, the sheet 201 has an original thickness layer 2015, a transition layer 2016, and a half-thickness layer 2017. The thicknesses of the original thickness layer 2015, the transition layer 2016, and the half-thickness layer 2017 decrease sequentially. The two sides of the transition layer 2016 are connected to the original thickness layer 2015 and the half-thickness layer 2017, respectively. The extension end 2011 is made of the original thickness layer 2015. The first vertical segment 20121 is made of the original thickness layer 2015, the transition layer 2016, and the half-thickness layer 2017. The inward folded segment 20122, the second vertical segment 20123, and the outward folded segment 20124 are all made of the half-thickness layer 2017. It should be noted that the transition layer 2016 and the half-thick layer 2017 of the sheet 201 can be obtained by stamping or planing. In addition, by setting the inner fold section 20122, the second vertical section 20123 and the outer fold section 20124 as the half-thick layer 2017, although the inner fold section 20122 and the outer fold section 20124 increase the overall material width, the material thickness is reduced by setting the half-thick layer 2017, thereby reducing the material cost of this structure.

[0028] It should be noted that, since the commutator segments 20 are embedded in the bakelite powder body 10 in a ring array arrangement, and during motor operation, the commutator segments 20 are subjected to a centrifugal force that throws them outward, in order to further prevent the commutator segments 20 from falling out, as follows: Figure 2 and Figure 4 As shown, both ends of the semi-thick layer 2017 have a cutting groove 2018. The cutting groove 2018 extends a predetermined distance from both ends of the plate 201 towards the middle section of the plate 201. The hook-type commutator with high connection strength includes two insulating rings 30. The two insulating rings 30 are respectively sleeved on both ends of each commutator segment 20, and the insulating rings 30 are located in the cutting groove 2018. When the insulating rings 30 are placed in the cutting groove 2018, the bakelite powder body 10 fills the groove opening of the cutting groove 2018.

[0029] It should be noted that by setting the insulating ring 30 and clamping each commutator segment 20, that is, by having one arc-shaped part of the insulating ring 30 extend into the groove 2018 on the corresponding commutator segment 20, a limiting effect is achieved on each commutator segment 20 arranged in a ring array; in addition, since the bakelite powder body 10 is formed and then fills the groove 2018, the insulating ring 30 is prevented from moving from the axial direction of the bakelite powder body 10 and coming out of the groove 2018.

[0030] In addition, to further improve the connection strength between the commutator 20 and the bakelite powder body 10, such as Figure 2 and Figure 4 As shown, the first vertical section 20121 has a plurality of spaced first through holes 201211, and the second vertical section 20123 has a plurality of spaced second through holes 201231. Both the first through holes 201211 and the second through holes 201231 are filled with the bakelite powder body 10.

[0031] In fact, to increase the connection strength, a rod can be inserted into the corresponding second through holes 201231 of the two bending assemblies 2012. The two ends of the rod do not move after the bakelite powder body 10 is formed. The presence of the rod will further restrict the two bending assemblies 2012 from moving and disengaging in a direction away from the central axis of the bakelite powder body 10. However, it should be noted that the cost of setting the rod is higher than the cost of simply opening the second through holes 201231.

[0032] In addition, to reduce the impact of opening the first through hole 201211 and the second through hole 201231 on the strength of the commutator segment 20, such as Figure 2 and Figure 4As shown, a second through hole 201231 is provided between each of two adjacent first through holes 201211, which can also be understood as a first through hole 201211 being provided between each of two adjacent second through holes 201231.

[0033] Furthermore, in the embodiments of this application, such as Figure 1 and Figure 4 As shown, the bakelite powder body 10 is cylindrical in shape, and the center of the bakelite powder body 10 has a through hole 101.

[0034] In addition, to reduce the distribution and conduction of worn metal debris between adjacent commutator segments 20 after wear, such as... Figure 1 As shown, the bakelite powder body 10 has several partition grooves 102 arranged in a ring array around its circumference. Each pair of adjacent commutator segments 20 is provided with a partition groove 102. The probability of metal fragments falling into the partition groove 102 and then connecting in series to form a line is effectively reduced.

[0035] In summary, the hook-type commutator with high connection strength described in the embodiments of this application is explained, which provides advantages such as the outer contour body being obtained by stamping and bending laminations, and low manufacturing cost for mass production.

[0036] It is worth mentioning that, in the embodiments of this application, the hook-type commutator with high connection strength has a simple structure, does not involve complex manufacturing processes or expensive materials, and has high economic efficiency. At the same time, for manufacturers, the hook-type commutator with high connection strength provided in this application is easy to produce and has low cost, which is more conducive to controlling production costs and further facilitates product promotion and use.

[0037] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.

Claims

1. A hook-type commutator having high connection strength, characterized by: The hook-shaped commutator with high connection strength comprises A bakelite body, a plurality of commutator segments are embedded on the bakelite body in a ring array arrangement, each of the commutator segments comprises a segment body, one end of the segment body has an extension end, the extension end is bent by a predetermined angle to form a winding part, two sides of the segment body are bent by a predetermined angle to form two bending combinations in the same plane, each of the bending combinations comprises a first vertical segment, an inner bending segment, a second vertical segment and an outer bending segment, the inner bending segment is bent by a predetermined angle from a side of the first vertical segment to a middle segment in the width direction of the commutator segment, the outer bending segment is bent by a predetermined angle from a side of the second vertical segment away from the inner bending segment to a direction away from the middle segment in the width direction of the commutator segment, a T-shaped cavity with an opening is formed between the two bending combinations, the inner bending segment, the second vertical segment and the outer bending segment together form a hook cavity, and the T-shaped cavity and the hook cavity are both filled with the bakelite body.

2. The high connection strength hook-type commutator according to claim 1, characterized by: The segment body has a first thick layer, a transition layer and a second thick layer, the thickness of the first thick layer, the transition layer and the second thick layer decreases in turn, the two sides of the transition layer are connected with the first thick layer and the second thick layer respectively, the extension end is made of the first thick layer, the first vertical segment is made of the first thick layer, the transition layer and the second thick layer together, and the inner bending segment, the second vertical segment and the outer bending segment are all made of the second thick layer.

3. The high connection strength hook-type commutator according to claim 2, characterized by: Both ends of the second thick layer have a slot, the slot extends from both ends of the segment body to the middle segment of the segment body by a predetermined distance, the hook-shaped commutator with high connection strength comprises two insulating rings, each of the insulating rings is sleeved on both ends of each of the commutator segments, and the insulating rings are located in the slots, after the insulating rings are placed in the slots, the bakelite body fills the slot opening of the slot.

4. The high connection strength hook-type commutator according to claim 3, characterized by: The first vertical segment has a plurality of first through holes arranged at intervals, the second vertical segment has a plurality of second through holes arranged at intervals, and the first through holes and the second through holes are both filled with the bakelite body.

5. The high connection strength hook-type commutator according to claim 4, characterized by: Each of the first through holes is provided with one of the second through holes.

6. The high connection strength hook-type commutator according to any one of claims 1 to 5, characterized by: The center of the bakelite body has a through hole.

7. The high connection strength hook-type commutator according to claim 6, characterized by: The circumferential direction of the bakelite body is arranged in a ring array with a plurality of partition grooves, and each of the commutator segments is provided with one of the partition grooves.

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