Commutator and motor
By setting filling grooves on the copper shell and embedding insulating substrate, the problem of paint dripping into the insulating grooves is solved, improving the stability and functional stability of the commutator and motor.
Patent Information
- Application Number
- CN202422663749.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In the existing commutator, during the varnishing process, the varnish can easily enter along the insulation groove, leading to unstable motor performance.
A filling groove is provided on the upper end face of the copper shell, and the insulating substrate is embedded in the filling groove to ensure that the insulating groove is not penetrated, thereby preventing the dripping paint from flowing into the insulating groove and enhancing the connection strength and stability of the commutator segment and the hanging wire bend.
This effectively prevents paint drips into the insulation groove, ensuring the stability and functional stability of the motor at high speeds.
Smart Images
Figure CN223527582U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a commutator technical field, concretely relates to a commutator and motor. BACKGROUND
[0002] With the continuous development of human society, people in life more and more use electric tools to provide convenience for life, especially in the automobile industry, it is also more and more use automatic device, the use of motor and commutator is more and more, the performance requirement of motor is higher and higher, especially the stability and life requirement of motor is higher and higher.
[0003] The motor will vibrate in the process of running at a high speed, in order to prevent the vibration of the motor from causing the winding of the winding part of the commutator to be disconnected and causing the motor to malfunction, a paint dripping process is usually used to fix the winding of the winding part of the commutator. Most of the existing commutators generally adopt copper shell formed by punching and bending of copper plate, after cleaning, the copper shell is injection molded with an insulating base, then the copper shell is machined and grooved to form a plurality of insulating grooves, so that the insulating grooves divide the copper shell into a plurality of commutator segments insulated from each other, and finally the hook is made. The insulating groove in the above-mentioned commutator extends from the bottom of the copper shell to the bottom of the winding part, and penetrates the insulating base, so that the end of the insulating groove towards the winding part is not blocked by the insulating base. In the process of fixing the winding of the winding part of the commutator by using the paint dripping process, the paint is easy to enter the insulating groove along the winding part, resulting in unstable performance of the motor equipped with the above-mentioned commutator. SUMMARY
[0004] Therefore, the utility model provides a kind of commutator and motor to solve the problem that paint is easy to enter insulating groove along winding part in the process of fixing winding of winding part of existing commutator by using paint dripping process.
[0005] In the first aspect, the utility model provides a kind of commutator, comprising:
[0006] insulating base;
[0007] copper shell, which is arranged on the outer circumferential surface of the insulating base and combined with the insulating base, is provided with a plurality of insulating grooves at intervals in the circumferential direction, and the plurality of insulating grooves are used to divide the copper shell into a plurality of commutator segments insulated from each other. Each of the commutator segments is provided with a winding hook portion at the opposite upper end surface in the axial direction, and the clamping region between the two adjacent winding hook portions in the circumferential direction forms an isolation groove. The upper end surface of the copper shell is recessed with a filling groove corresponding to the position of each isolation groove. The insulating base is used to fix the plurality of commutator segments together and fill the filling groove. The insulating groove extends from the bottom of the copper shell to the bottom of the filling groove in the axial direction.
[0008] The commutator has at least the following beneficial effects:
[0009] The filling groove is provided with a part of the insulation base body, and the insulation groove extends to the bottom of the filling groove along the axial direction and does not penetrate the part of the insulation base body filled in the filling groove, so that the insulation groove and the insulation groove are not penetrated, thereby ensuring that, in the process of fixing the winding of the winding in the commutator by using the paint dripping process, the insulation base body filled in the filling groove blocks the route of the paint dripping into the insulation groove, effectively avoiding the paint from entering the insulation groove, ensuring the paint dripping effect, and further ensuring the stability of the motor equipped with the commutator in high-speed operation.
[0010] In an alternative embodiment, the hanging wire bending part is provided with a holding section at one end connected with the commutator sheet.
[0011] In an alternative embodiment, the holding section is provided in an isosceles trapezoidal shape, the width dimension of the holding section gradually increases from top to bottom along the axial direction, and the width dimension of one end of the holding section connected with the hanging wire bending part is the same as the width dimension of the hanging wire bending part.
[0012] In an alternative embodiment, one end of the hanging wire bending part away from the holding section is outwardly folded to form an inclined section, the inclined section extends from inside to outside along the radial direction of the copper shell and is downwardly inclined, and the included angle between the arrangement direction of the inclined section and the axial direction is 45°.
[0013] In an alternative embodiment, the inner wall of the copper shell is provided with an inclined opening at a position in the same straight line with each filling groove along the axial direction, the inclined opening extends from outside to inside along the radial direction of the copper shell and is downwardly inclined, the opposite upper end of the inclined opening is communicated with the filling groove along the axial direction, and the opposite lower end of the inclined opening is communicated with the insulation groove along the axial direction.
[0014] And / or, the ratio of the axial dimension of the filling groove to the axial dimension of the copper shell is 0.08 to 0.09.
[0015] In an alternative embodiment, the inner wall of each of the commutating segments is provided with a hook portion at a position corresponding to the hanging wire bend, the hook portion extending radially towards the center of the copper shell; the relatively upper end of the hook portion is folded inward to form a connecting member, the connecting member extending from outside to inside radially and being inclined upward.
[0016] In an alternative embodiment, the inner side of the hook portion combined with the insulating base body is provided with a groove, the groove penetrating through the hook portion axially away from the lower end surface of the connecting member.
[0017] In an alternative embodiment, the inner wall of the copper shell is provided with two annular grooves spaced axially, the two annular grooves being used to sequentially separate the hook portion into a first segment, a second segment and a third segment from top to bottom axially; the first segment is connected with the connecting member at one end away from the second segment, the end surface of the first segment towards the second segment being provided as a first inclined surface, the first inclined surface extending from outside to inside radially and being inclined downward.
[0018] In an alternative embodiment, the second segment and the third segment are identical in structure, the two end surfaces of the second segment being provided as second inclined surfaces axially, the second inclined surfaces extending from outside to inside radially and being inclined downward.
[0019] And / or, the included angle between the arrangement direction of the connecting member and the axial direction is set to 45°.
[0020] In a second aspect, the utility model also provides a motor, including the commutator of the first aspect.
[0021] Because the motor includes the commutator, has the same beneficial effect with the commutator, and here will not repeat. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor according to these drawings.
[0023] Figure 1 It is a three-dimensional structural schematic diagram of the commutator of the utility model embodiment;
[0024] Figure 2 It is Figure 1 The exploded structural schematic diagram;
[0025] Figure 3 It isFigure 2 An enlarged schematic view of the position A in FIG. 1;
[0026] Figure 4 A perspective structural schematic view of the commutator in which the insulating base is removed in an embodiment of the present application;
[0027] Figure 5 A sectional front structural schematic view of the commutator in an embodiment of the present application; Figure 4
[0028] Figure 6 An enlarged schematic view of the position B in FIG. 2; Figure 5
[0029] Figure 7 An enlarged schematic view of the position C in FIG. 3. Figure 5
[0030] Explanation of reference signs:
[0031] 100 - insulating base;
[0032] 200 - copper shell, 210 - insulating groove, 220 - commutator segment, 230 - wire hanging bend, 231 - insulating groove, 232 - holding section, 233 - inclined section, 240 - filling groove, 250 - inclined opening, 260 - hook portion, 261 - connecting piece, 262 - groove, 263 - first section, 2631 - first inclined surface, 264 - second section, 2641 - second inclined surface, 265 - third section, 270 - annular groove. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.
[0034] In the description of the present embodiments, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present embodiments. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0035] In the description of the embodiments, it should be noted that unless specifically defined and limited, the terms "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments can be understood according to the specific circumstances.
[0036] The motor will vibrate during operation at a high speed. In order to prevent the vibration of the motor from causing the winding of the hanging wire part of the commutator to be disconnected and causing the motor to malfunction, a paint dripping process is usually used to fix the winding of the commutator on the hanging wire part. The commutator applied to the motor operating at a high speed in the related art is generally formed by punching and bending a copper plate to form a copper shell, and then injection molding the copper shell and an insulating base after cleaning. Then, pins are turned on the copper shell, and a plurality of insulating grooves are milled out, so that the insulating grooves divide the copper shell into a plurality of commutator segments insulated and separated from each other, and finally the commutator segments are made by hooking. The insulating groove in the above-mentioned commutator extends from the bottom of the copper shell to the bottom of the hanging wire part, and penetrates the insulating base, so that the end of the insulating groove towards the hanging wire part is not blocked by the insulating base. In the process of fixing the winding of the commutator on the hanging wire part by using the paint dripping process, the paint dripping is easy to enter the insulating groove along the hanging wire part, resulting in unstable use performance of the motor equipped with the above-mentioned commutator. In order to solve the above technical defects, the utility model embodiment provides a kind of commutator and motor.
[0037] The embodiments of the utility model will be described below in conjunction with Figures 1 to 7 .
[0038] According to the first aspect of the embodiments of the utility model, a kind of commutator is provided, including insulating base 100 and copper shell 200, the copper shell 200 is set on the outer circumferential surface of the insulating base 100 and is combined with the insulating base 100, the copper shell 200 is spaced apart and is provided with a plurality of insulating grooves 210 along the circumference, a plurality of the insulating grooves 210 are used to divide the copper shell 200 into a plurality of commutator segments 220 insulated and separated from each other, each commutator segment 220 is provided with a hanging wire hooking portion 230 on the opposite upper end surface along the axial direction, the clamping region between the adjacent two hanging wire hooking portions 230 along the circumferential direction forms insulating groove 231, the upper end surface of the copper shell 200 is recessed with a filling groove 240 at the position corresponding to each insulating groove 231;The insulating base 100 is used to fix a plurality of the commutator segments 220 together, and is filled in the filling groove 240;The insulating groove 210 extends from the bottom of the copper shell 200 to the bottom of the filling groove 240 along the axial direction. It can be understood that the axial direction described in the text refers to the axial direction in the above-mentioned copper shell 200, and the upward and downward described in the text are with the copper shell 200 as the reference. Figure 1 Figure 1 、 Figure 2 and Figure 5 are described from the perspective of the copper shell 200.
[0039] The commutator of the embodiment is characterized in that a filling groove 240 is concavely arranged at the position corresponding to each insulation groove 231 on the opposite upper end surface of the copper shell 200 along the axial direction, a part of the insulation base body 100 is embedded in the filling groove 240, and the insulation groove 210 extends to the bottom of the filling groove 240 along the axial direction towards one end of the wire hanging bending part 230 and does not penetrate the part of the insulation base body 100 filled in the filling groove 240, thereby ensuring that the insulation groove 210 and the insulation groove 231 are not penetrated, so that in the process of fixing the winding of the winding to the wire hanging bending part 230 of the commutator of the embodiment by using the paint dripping process, the insulation base body 100 filled in the filling groove 240 blocks the route of the paint dripping to the insulation groove 210, effectively avoiding the paint from entering the insulation groove 210, ensuring the paint dripping effect, and further ensuring the stability of the motor equipped with the commutator of the embodiment in operation at a high speed. At the same time, because the filling groove 240 is embedded with the insulation base body 100, it can effectively ensure that the adjacent two commutator segments 220 and the adjacent two wire hanging bending parts 230 are not easily deformed in contact under pressure, thereby ensuring the stability of the function of the commutator of the embodiment.
[0040] As shown in Figure 2 、 Figure 3 、 Figure 5 and Figure 6 , in some embodiments, the end of the wire hanging bending part 230 connected with the commutator segment 220 is provided with a holding section 232, and the width size of the holding section 232 is greater than the width size of the wire hanging bending part 230. By increasing the connection area with the commutator segment 220 through the holding section 232 with a larger width size, the connection strength of the wire hanging bending part 230 and the commutator segment 220 is ensured, thereby ensuring the stability of the motor equipped with the commutator of the embodiment in operation at a high speed.
[0041] As shown in Figure 2 and Figure 3 , specifically, the holding section 232 is arranged in the shape of an isosceles trapezoid, the width size of the holding section 232 gradually increases from top to bottom along the axial direction, and the width size of the end of the holding section 232 connected with the wire hanging bending part 230 is the same as the width size of the wire hanging bending part 230. By arranging the holding section 232 in the shape of an isosceles trapezoid with a narrow top and a wide bottom, it can be ensured that the holding section 232 is in interference fit with the injection mold during the injection molding process of the copper shell 200 and the insulation base body 100 to manufacture the commutator of the embodiment, thereby avoiding the generation of flash during the injection molding process, and ensuring the quality of the manufactured commutator of the embodiment.
[0042] As shown in Figure 5 and Figure 6As shown, specifically, the hanging line bend 230 is outwardly folded to form an inclined section 233 at one end away from the holding section 232, the inclined section 233 extends from inside to outside along the radial direction of the copper shell 200 and is arranged in a downward inclination, and the included angle between the arrangement direction of the inclined section 233 and the axial direction is 45°. The "inverted V-shaped" structure formed by the inclined section 233 and the holding section 232 is more convenient for winding the winding wire thereon, and the inclined section 233 arranged at an inclination of 45° is more conducive to preventing the winding wire wound on the inclined section 233 from falling off when the motor equipped with the commutator of the embodiment is used at a high rotating speed, thereby further improving the stability of the motor equipped with the commutator of the embodiment when the motor is used at a high rotating speed.
[0043] As shown in Figure 2 , Figure 3 , Figure 5 and Figure 6 , in some embodiments, an inclined opening 250 is recessed in the inner wall of the copper shell 200 at a position where the inner wall is in the same axial line with each of the filling grooves 240, the inclined opening 250 extends from outside to inside along the radial direction of the copper shell 200 and is arranged in a downward inclination, the opposite upper end of the inclined opening 250 along the axial direction is in communication with the filling groove 240, and the opposite lower end of the inclined opening 250 along the axial direction is in communication with the insulation groove 210. After the copper shell 200 and the insulation base 100 are injection molded, and in the process of milling the insulation groove 210 on the copper shell 200 at a position where the filling groove 240 is in the same axial line by using a circular milling cutter, in order to ensure that the inner wall of the copper shell 200 is milled along the radial direction to ensure that the adjacent two commutator segments 220 are insulated and to reduce the damage to the insulation base 100 located in the copper shell 200, the circular milling cutter is usually arranged in the same axial line with the inner wall of the copper shell 200 at the end of the inner wall of the copper shell 200 along the radial direction; however, when the highest point of the circular milling cutter is flush with the lowest point of the filling groove 240, the circular arc of the circular milling cutter cannot mill the surrounding wall of the copper shell 200 along the axial direction, and the circular milling cutter needs to be at least partially moved into the filling groove 240 to ensure that the surrounding wall of the copper shell 200 is milled along the axial direction, which has the risk of milling the insulation base 100 filled in the filling groove 240. The embodiment recesses the inclined opening 250 in the inner wall of the copper shell 200 at a position corresponding to the position where the filling groove 240 is in communication along the axial direction, removes the area that cannot be contacted by the circular arc of the circular milling cutter when the highest point of the circular milling cutter is flush with the lowest point of the filling groove 240 in advance, ensures that the surrounding wall of the copper shell 200 is milled along the axial direction to obtain the insulation groove 210 without moving the circular milling cutter at least partially into the filling groove 240 during the preparation of the commutator of the embodiment, thereby reducing or even eliminating the risk of milling the insulation base 100 in the filling groove 240, and reducing the difficulty of preparing the commutator of the embodiment.
[0044] In some embodiments, the ratio of the axial dimension of the filling slot 240 to the axial dimension of the copper shell 200 is set to 0.08 to 0.09. A trial experiment of the commutator of the present embodiment is prepared using copper shells 200 with the same other size parameters and the only difference being the ratio of the axial dimension of the filling slot 240 to the axial dimension of the copper shell 200. The milling-through of the insulating matrix 100 in the filling slot 240 of the prepared commutator and the strength of the commutator are obtained. The copper shells 200 used are numbered as follows: ①, the ratio of the axial dimension of the filling slot 240 to the axial dimension of the copper shell 200 is set to 0.07, in detail, the axial dimension of the copper shell 200 is 20 mm, and the axial dimension of the filling slot 240 is set to 1.4 mm; ②, the ratio of the axial dimension of the filling slot 240 to the axial dimension of the copper shell 200 is set to 0.08, in detail, the axial dimension of the copper shell 200 is 20 mm, and the axial dimension of the filling slot 240 is set to 1.6 mm; ③, the ratio of the axial dimension of the filling slot 240 to the axial dimension of the copper shell 200 is set to 0.09, in detail, the axial dimension of the copper shell 200 is 20 mm, and the axial dimension of the filling slot 240 is set to 1.8 mm; ④, the ratio of the axial dimension of the filling slot 240 to the axial dimension of the copper shell 200 is set to 0.10, in detail, the axial dimension of the copper shell 200 is 20 mm, and the axial dimension of the filling slot 240 is set to 2.0 mm. After analyzing the commutators prepared by using the copper shells 200 numbered above and the insulating matrix 100 to be injection molded into one body and then milling the insulating slots 210, it is found that: the insulating matrix 100 in the filling slot 240 of the commutator prepared by using the copper shell 200 numbered ① is milled through, and the structural strength is high; the insulating matrix 100 in the filling slot 240 of the commutator prepared by using the copper shell 200 numbered ② is not milled through, and the structural strength is slightly lower than that of the commutator prepared by using the copper shell 200 numbered ①, but there is no obvious difference; the insulating matrix 100 in the filling slot 240 of the commutator prepared by using the copper shell 200 numbered ③ is not milled through, and the structural strength is slightly lower than that of the commutator prepared by using the copper shell 200 numbered ②, but there is no obvious difference; the insulating matrix 100 in the filling slot 240 of the commutator prepared by using the copper shell 200 numbered ④ is not milled through, but the structural strength is obviously lower than that of the commutator prepared by using the copper shell 200 numbered ③.
[0045] As Figure 2 Prepared Figure 7As shown, in some embodiments, the inner wall of each of the commutating segments 220 is provided with a hook portion 260 at a position corresponding to the wire hanging bend 230, which extends towards the center of the copper shell 200 along the radial direction of the copper shell 200; the relatively upper end of the hook portion 260 is folded inward to form a connecting piece 261, which extends from outside to inside along the radial direction of the copper shell 200 and is obliquely arranged upwards. By providing the hook portion 260 on the inner wall of the copper shell 200 along the radial direction thereof and inwardly protruding, in the process of injection molding the copper shell 200 and the insulating base 100 to obtain the commutator of the present embodiment, the hook portion 260 can be embedded in the insulating base 100 to ensure the stability and strength of the combination of the copper shell 200 and the insulating base 100 in the commutator of the present embodiment; meanwhile, the connecting piece 261 is formed by folding the hook portion 260 towards one end of the wire hanging bend 230 along the radial direction of the copper shell 200 and inwardly, and the obliquely arranged connecting piece 261 can increase the radial and axial tensile resistance of the combination of the copper shell 200 and the insulating base 100 in the commutator of the present embodiment, further improving the combination strength of the commutating segments 220 and the insulating base 100 in the commutator of the present embodiment, thereby further improving the stability of the motor equipped with the commutator of the present embodiment in operation at a high speed.
[0046] Specifically, the included angle between the arrangement direction of the connecting piece 261 and the axial direction is set to 45°. In the process of injection molding the copper shell 200 and the insulating base 100 to obtain the commutator of the present embodiment, the obliquely arranged connecting piece 261 at 45° can better increase the axial tensile resistance of the combination of the copper shell 200 and the insulating base 100 in the commutator of the present embodiment, further improving the combination strength of the commutating segments 220 and the insulating base 100 in the commutator of the present embodiment, thereby further improving the stability of the motor equipped with the commutator of the present embodiment in operation at a high speed.
[0047] As Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, specifically, the inner side of the hook portion 260 combined with the insulating base 100 is provided with a groove 262 penetrating the hook portion 260 along the axial direction away from the lower end surface of the connecting piece 261. In the process of injection molding the copper shell 200 and the insulating base 100 to obtain the commutator of the embodiment, the insulating base 100 can be filled into the groove 262, i.e. the part of the insulating base 100 in the groove 262 is limited in the circumferential direction by the two surrounding walls of the groove 262, further increasing the circumferential tensile resistance of the combination of the copper shell 200 and the insulating base 100 in the commutator of the embodiment; and the connecting piece 261 covers the top end of the groove 262, so that the part of the insulating base 100 in the groove 262 is in close contact with the bottom end surface of the connecting piece 261, and cooperates with the part of the insulating base 100 covering the upper end surface of the connecting piece 261, further increasing the axial tensile resistance of the combination of the copper shell 200 and the insulating base 100 in the commutator of the embodiment, i.e. further improving the combination strength of the commutator segment 220 and the insulating base 100 in the commutator of the embodiment, thereby further improving the stability of the motor equipped with the commutator of the embodiment in use at a high rotating speed.
[0048] As Figures 4 to 7As shown, specifically, the inner wall of the copper shell 200 is axially spaced apart with two annular grooves 270, and the two annular grooves 270 are used to sequentially separate the hook portion 260 into a first section 263, a second section 264 and a third section 265 from top to bottom along the axial direction; the end of the first section 263 away from the second section 264 is connected with the connecting piece 261, and the end face of the first section 263 towards the second section 264 is provided with a first inclined surface 2631 extending from outside to inside along the radial direction of the copper shell 200 and inclined downward. In the process of injection molding the commutator of the embodiment by combining the copper shell 200 with the insulating base 100, the two annular grooves 270 are filled with the insulating base 100, so that the interval area between the first section 263 and the second section 264 and the interval area between the second section 264 and the third section 265 are both filled with the insulating base 100, thereby limiting the axial freedom degree of the insulating base 100 part located in the interval area between the first section 263 and the second section 264, and limiting the axial freedom degree of the insulating base 100 part located in the interval area between the second section 264 and the third section 265, further increasing the axial tensile resistance of the combination of the copper shell 200 and the insulating base 100 in the commutator of the embodiment; at the same time, by setting the end face of the first section 263 towards the second section 264 as the first inclined surface 2631 gradually inclined downward, the radial and axial tensile resistance of the combination of the first section 263 and the insulating base 100 is further increased, the combination strength of the commutator segment 220 and the insulating base 100 in the commutator of the embodiment is further improved, and the stability of the motor equipped with the commutator of the embodiment in high-speed operation is further improved.
[0049] As shown in Figure 4 and Figure 7 As shown, specifically, the second section 264 and the third section 265 are the same in structure, the two end faces of the second section 264 along the axial direction are both provided with a second inclined surface 2641 extending from outside to inside along the radial direction of the copper shell 200 and inclined downward. In the process of injection molding the commutator of the embodiment by combining the copper shell 200 with the insulating base 100, the second inclined surface 2641 arranged obliquely further increases the radial and axial tensile resistance of the combination of the second section 264 and the third section 265 and the insulating base 100, further improves the combination strength of the commutator segment 220 and the insulating base 100 in the commutator of the embodiment, and further improves the stability of the motor equipped with the commutator of the embodiment in high-speed operation.
[0050] According to the second aspect of the embodiment of the utility model, a motor is also provided, which comprises the commutator provided by the first aspect of the embodiment of the utility model. The commutator of the chair motor in the embodiment is provided with a filling groove 240 at the position corresponding to each insulation groove 231 on the opposite upper end surface of the copper shell 200 along the axial direction, and part of the insulation base 100 is embedded in the filling groove 240. The insulation groove 210 extends to the bottom of the filling groove 240 along the axial direction towards one end of the wire hanging bending part 230, and does not penetrate the part of the insulation base 100 filled in the filling groove 240. The insulation groove 210 and the insulation groove 231 are not penetrated, so that in the process of fixing the winding of the winding by using the paint dripping process on the wire hanging bending part 230 of the commutator, the insulation base 100 filled in the filling groove 240 blocks the route of the paint flowing to the insulation groove 210, effectively avoids the paint entering the insulation groove 210, ensures the paint effect, and further ensures the stability of the motor in the embodiment in the operation at a high speed. At the same time, because the insulation base 100 is embedded in the filling groove 240, the contact between the adjacent two commutator segments 220 and the adjacent two wire hanging bending parts 230 is effectively prevented from being deformed under pressure, the stability of the function of the commutator is ensured, and the stability of the motor in the embodiment in the operation at a high speed is further improved.
[0051] Although the embodiments of the utility model are described in combination with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the utility model.
Claims
1. A commutator, characterized in that include: Insulating substrate (100); A copper shell (200) is disposed on the outer peripheral surface of the insulating substrate (100) and is bonded to the insulating substrate (100). The copper shell (200) is provided with a plurality of insulating grooves (210) spaced apart along the circumference. The plurality of insulating grooves (210) are used to divide the copper shell (200) into a plurality of commutator segments (220) that are insulated from each other. Each commutator segment (220) is provided with a wire hanging bend (230) on the opposite upper end face along the axial direction. Two adjacent wire hanging bends The clamping area between the parts (230) in the circumferential direction forms an isolation groove (231), and the upper end face of the copper shell (200) is recessed with a filling groove (240) corresponding to each isolation groove (231); the insulating substrate (100) is used to fix the multiple commutator segments (220) together and fill the filling groove (240); the insulating groove (210) extends axially from the bottom of the copper shell (200) to the bottom of the filling groove (240).
2. A commutator according to claim 1, characterised in that The end of the hanging wire bend (230) connected to the commutator segment (220) is provided with a retaining section (232), the width of which is greater than the width of the hanging wire bend (230).
3. A commutator according to claim 2, characterised in that The retaining section (232) is configured as an isosceles trapezoid, and the width of the retaining section (232) gradually increases from top to bottom along the axial direction. The width of the end of the retaining section (232) connected to the hanging wire bend (230) is the same as the width of the hanging wire bend (230).
4. A commutator according to claim 2 or 3, characterised in that The end of the hanging wire bend (230) away from the holding section (232) is folded outward to form an inclined section (233). The inclined section (233) extends from the inside to the outside along the radial direction of the copper shell (200) and is inclined downward. The angle between the arrangement direction of the inclined section (233) and the axial direction is set to 45°.
5. A commutator according to any one of claims 1 to 3, characterised in that, An inclined opening (250) is recessed in the inner wall of the copper shell (200) at a position that is aligned with each of the filling grooves (240) along the axial direction. The inclined opening (250) extends from the outside to the inside along the radial direction of the copper shell (200) and is inclined downward. The upper end of the inclined opening (250) along the axial direction is connected to the filling groove (240), and the lower end of the inclined opening (250) along the axial direction is connected to the insulating groove (210). And / or, the ratio of the axial dimension of the filling groove (240) to the axial dimension of the copper shell (200) is set to 0.08 to 0.
09.
6. A commutator according to any one of claims 1 to 3, characterised in that, Each commutator segment (220) has a hook (260) at a position corresponding to the hanging wire bend (230) on its inner wall. The hook (260) extends radially toward the center of the copper shell (200). The upper end of the hook (260) is folded inward along the axial direction to form a connector (261). The connector (261) extends radially from the outside to the inside along the copper shell (200) and is inclined upward.
7. A commutator according to claim 6, characterised in that The inner side of the hook part (260) combined with the insulating base (100) is provided with a groove (262) penetrating the hook part (260) away from the lower end surface of the connecting piece (261) in the axial direction.
8. A commutator according to claim 7, characterised in that The inner wall of the copper shell (200) is provided with two annular grooves (270) in the axial direction, the hook part (260) is sequentially separated into a first section (263), a second section (264) and a third section (265) from top to bottom in the axial direction, one end of the first section (263) away from the second section (264) is connected with the connecting piece (261), the end surface of the first section (263) towards the second section (264) is provided with a first inclined surface (2631), the first inclined surface (2631) extends from outside to inside in the radial direction of the copper shell (200) and is provided in a downward inclined manner.
9. A commutator according to claim 8, wherein The second section (264) and the third section (265) are the same in structure, the two end surfaces of the second section (264) in the axial direction are both provided with a second inclined surface (2641), the second inclined surface (2641) extends from outside to inside in the radial direction of the copper shell (200) and is provided in a downward inclined manner. And / or, the included angle between the arrangement direction of the connecting piece (261) and the axial direction is 45°.
10. An electric machine characterized by The commutator comprises the commutator according to any one of claims 1 to 9.