Long leg commutator

Abstract

The application discloses a long-leg commutator, which comprises a framework, pole pieces and a pressing ring, wherein the main body part of the framework is in the shape of a column with an axial hole in the inside, a support ring part is arranged in the middle part, and a positioning groove is arranged on the upper surface of the support ring part; the pole piece comprises a fitting part and a connecting part, the connecting part comprises a positioning section, a transition section and a contact section, the positioning section is located in the positioning groove, the transition section is abutted to the outer peripheral surface of the support ring part, and the contact section is supported on the support ring part; a support sheet body is arranged on the lower surface of the support ring part, and the support sheet body has a support angle part which extends out of the support ring part; a suspended support leg is arranged below the main body part and is used for suspending the main body part; the positioning groove is used for limiting the positioning section, and the suspended support leg is used for realizing the suspension of the main body part, so that the displacement of the pole piece is effectively prevented, the insulation performance and the electrical safety are improved, and the beneficial effects of preventing wire hanging, wire pressing and virtual welding are simultaneously achieved.

Description

Technical Field

[0001] This invention relates to the field of motor commutator technology, specifically to a long-leg commutator, and particularly to a long-leg commutator with anti-snagging, anti-crushing, and anti-fraying solder joint structures and a suspended support design. Background Technology

[0002] A commutator, commonly known as a rectifier, is a core component in an electric motor that enables the motor to rotate continuously. A commutator typically consists of a frame, a pressure ring, and several pole pieces. The frame has a tubular structure with outwardly extending annular bosses. Each pole piece includes a main piece and a support. The main piece fits against the outer circumference of the frame, and the support is fitted against the annular boss. The pressure ring presses onto the main piece or support, fixing the pole piece to the frame.

[0003] In the actual production and use of commutators, the reliability of pole plate fixation is a key factor affecting the operational stability of the motor. Existing commutators suffer from the following technical problems: First, the reliability of electrode fixing is insufficient. Traditionally, electrodes are fixed by the clamping force between the pressure ring and the frame. During the high-speed rotation of the commutator, the electrodes are prone to radial rotation or axial displacement around the frame, which disrupts the symmetry between the electrodes, leads to poor commutation contact, and causes unstable motor operation. Some existing technologies use cavities on the electrodes, protrusions on the pressure ring for engagement, or third legs on the supports to cooperate with grooves in the frame. However, these structures only limit the overall displacement of the electrodes and lack a dedicated independent limiting structure for the positioning section of the electrode connection. The positional accuracy and fixing firmness of the positioning section within the positioning groove still need improvement.

[0004] Secondly, the problems of wire snagging and clamping are serious. During the manufacturing process of the commutator, enameled wire or conductor needs to be soldered to the contact section of the pole pieces. During the manufacturing and transportation of the commutator, the wire ends are prone to getting caught on the edges of the frame, the edges of the pole pieces, or other protruding structures, causing wire snagging problems, which can lead to the wire ends being pulled off or damaged. At the same time, during the wiring or shaping process, the wires are easily pressed into the gaps between the frame and the pole pieces or the angles between the pole pieces and the main body, causing wire clamping problems, which can damage the wire insulation layer and affect electrical performance.

[0005] Third, wire misalignment can lead to cold solder joints. The contact section of the electrode is usually a flat rectangular sheet structure. After the enameled wire is soldered to the contact section, it is easy for the wire to slide and shift along the width of the contact section when it is subjected to tension during subsequent winding or shaping processes. This can cause the solder joint to crack or form a cold solder joint, reducing the electrical connection reliability of the commutator.

[0006] Fourth, the main body is not sufficiently suspended, resulting in poor insulation performance. In existing commutators, the main body of the frame is in direct contact with or close to the mounting base. Under high-voltage operating conditions, the electrical clearance between the main body and the mounting base is insufficient, posing risks of creepage and breakdown, which affects the insulation performance and safety of the motor.

[0007] Therefore, there is an urgent need for a new type of long-leg commutator that can solve technical problems such as poor electrode positioning reliability, wire hanging and pressing, wire winding displacement and poor soldering, and insufficient suspension of the main body through special structural design. Summary of the Invention

[0008] This invention overcomes the shortcomings of the prior art. Its structural design is reasonable. Through the independent positioning of the positioning section by the positioning groove, the anti-snagging and anti-pressing design of the guiding slope and the avoidance slope, the anti-fracture welding design of the anti-detachment extension, and the suspended design of the main body of the suspended support, it achieves the beneficial effects of reliable electrode positioning, no wire snagging or pressing, stable welding and excellent insulation performance.

[0009] To achieve the above objectives, the present invention provides the following technical solution: A long-leg commutator includes a frame, electrode plates, and a retaining ring. The electrode plates are mounted on the frame, and the retaining ring is fitted onto the frame and positions the electrode plates thereon. The frame includes a main body, which is cylindrical with an internal axial opening. A radially outwardly extending support ring is integrally formed at the center of the main body, and a positioning groove is provided on the upper surface of the support ring. The electrode plates include a fitting portion and a connecting portion connected to the fitting portion. The fitting portion fits against the outer peripheral surface of the main body located above the support ring. The connecting portion includes a positioning section, a transition section, and a contact section integrally connected in sequence. The positioning section is located in the positioning groove, and the transition section abuts against the outer peripheral surface of the support ring. A support plate is integrally formed on the lower surface of the support ring, and the support plate has a support corner extending outward from the support ring. The support corner is correspondingly arranged with the positioning groove, and the contact section is supported on the support corner. A suspended support foot extends axially from the bottom surface of the main body located below the support ring, and the suspended support foot is correspondingly arranged with the support corner to suspend the main body.

[0010] By adopting the above technical solution, the main body of the skeleton is a cylindrical shape with an internal axial opening. An integrally formed support ring in the middle divides the skeleton into upper and lower regions. The upper surface of the support ring has a positioning groove. The electrode's contact portion fits against the outer circumferential surface of the upper part of the main body. The positioning segment of the connecting portion is embedded in the positioning groove, which independently limits the positioning segment, ensuring precise and secure positioning of the electrode on the skeleton and preventing radial displacement during rotation. The transition segment of the connecting portion abuts against the outer circumferential surface of the support ring, and the contact segment extends outward and is supported on the support corner. The functions of the electrode's contact portion, positioning segment, transition segment, and contact segment are clearly defined, ensuring reliable positioning. An integrally formed support piece on the lower surface of the support ring has a support corner extending outward from the support ring. The support corner corresponds to the positioning groove, and the contact segment is supported on the support corner. The support corner provides a stable support base for the contact segment, ensuring its positional accuracy. The suspended support feet located below the main body extend axially out of the main body, suspending the main body above the mounting base, which increases the electrical clearance between the main body and the mounting base, and improves the insulation performance and electrical safety of the commutator.

[0011] Preferably, there are three electrodes, with an included angle of 120 degrees between them. The number of positioning grooves corresponds to the number of electrodes. The support body is a triangular body with three supporting corners, and the three supporting corners correspond to the three positioning grooves.

[0012] By adopting the above technical solution, the three pole pieces are distributed at 120-degree equal angles, and the positioning grooves and support corners are all set one-to-one with the pole pieces. The three pole piece structure has good symmetry, ensuring the dynamic balance accuracy and commutation contact uniformity during commutator rotation. The support plate body adopts a triangular plate body, and the three support corners are set radially corresponding to the three positioning grooves. The stable structure of the triangular plate body provides balanced support force for the contact section of the three pole pieces.

[0013] Preferably, a gap section is provided between the positioning groove and the main body on one side, and the bottom of the fitting part abuts against the gap section.

[0014] By adopting the above technical solution, the spacing segment is located between the positioning groove and the main body, and the bottom of the electrode's bonding portion abuts against the spacing segment, making the bottom position of the bonding portion precisely controllable. The spacing segment provides a positioning reference surface for the bonding portion, ensuring the tightness and positional consistency of the bonding portion and the outer peripheral surface of the main body.

[0015] Preferably, all three support corner portions extend radially out of the support ring portion, and the ends of the three support corner portions away from the support ring portion are provided with straight surfaces.

[0016] By adopting the above technical solution, the three support corners extend radially into support rings, increasing the support area and support length of the contact section. The flat surfaces at the ends of the support corners provide a flat support reference for the contact section of the electrode, making the support position of the contact section accurate and stable.

[0017] Preferably, the triangular piece has a guide slope on the side between the two support corners, which is inclined toward the side of the support ring. The guide slope is used to prevent the wire from getting caught.

[0018] By adopting the above technical solution, the side between the two supporting corners of the triangular plate is inclined towards the side of the supporting ring to form a guide slope. During the manufacturing and transportation of the commutator, when the wire end comes into contact with the guide slope, the inclination angle of the guide slope causes the wire end to slide along the slope rather than be hooked on the edge of the plate, effectively preventing the wire from getting caught and protecting the wire from being pulled off or damaged.

[0019] Preferably, the bottom of the main body located below the support ring and away from the support ring is provided with an upwardly inclined avoidance slope on the side of the main body. There are three avoidance slopes, and the three avoidance slopes are provided one-to-one with the three support corners. The avoidance slopes are used to prevent the line from being pressed.

[0020] By adopting the above technical solution, the avoidance slope set between the bottom and side of the main body eliminates the sharp edges between the bottom and side of the main body. During wire laying or shaping, when the wire passes under the main body, the avoidance slope guides the wire to pass smoothly, preventing the wire from being pressed into the angled area between the main body and the support ring, effectively preventing wire compression and protecting the wire insulation layer from damage.

[0021] Preferably, the main body is provided with three positioning protrusions along the axial direction on the outer peripheral surface below the support ring. The three positioning protrusions are provided in a one-to-one correspondence with the three guide slopes. The positioning protrusions are used to prevent the wire from being pressed.

[0022] By adopting the above technical solution, the positioning protrusions on the lower outer circumferential surface of the main body are arranged axially and correspond one-to-one with the guide slope. The positioning protrusions form a raised guide structure on the outer circumferential surface of the main body, guiding the wire along the outside of the positioning protrusions, preventing the wire from being pressed into the gap between the main body and the support ring, and further enhancing the anti-crushing effect.

[0023] Preferably, there are three suspended legs, and the three suspended legs are arranged one-to-one with the three positioning protrusions. The suspended legs and the positioning protrusions are integrally formed.

[0024] By adopting the above technical solution, the three cantilevered legs and three positioning protrusions are integrally formed. The cantilevered legs extend axially from below the main body, resulting in good structural strength and stable support. The three cantilevered legs are evenly distributed along the circumference of the main body, ensuring the stability of the main body when suspended. The integral forming of the cantilevered legs and positioning protrusions simplifies the manufacturing process and reduces the number of parts.

[0025] Preferably, each suspended leg has an inner side groove for clearance, and the three clearance grooves are located around the opening in the main body.

[0026] By adopting the above technical solution, the clearance groove on the inner side of the suspended support is located circumferentially to the opening in the main body, providing clearance space for the installation of the rotating shaft or other internal components and preventing interference between the suspended support and the installed components. The clearance groove also reduces the weight of the suspended support, which is beneficial to the dynamic balance of the commutator.

[0027] Preferably, the end of the contact segment away from the transition segment extends outward in the width direction of the contact segment and is provided with an anti-detachment extension. The anti-detachment extension and the contact segment are connected by an arc transition. The anti-detachment extension and the arc transition are used to prevent the winding from shifting and causing poor soldering.

[0028] By adopting the above technical solution, the anti-detachment extension at the free end of the contact section extends outward in the width direction, increasing the width of the contact section end. After the enameled wire is soldered to the contact section, during subsequent winding or shaping processes, when the wire is subjected to tension, the anti-detachment extension blocks the sliding of the wire, preventing the wire from shifting along the width direction of the contact section, which could lead to the solder joint cracking or forming a weak solder joint. The arc-shaped transition structure avoids damage to the wire from sharp edges, ensuring the reliability of the soldering and the integrity of the wire.

[0029] Preferably, the pressure ring is ring-shaped, and the pressure ring is sleeved outside the fitting part and abuts against the upper surface of the support ring part, pressing the positioning section into the positioning groove.

[0030] By adopting the above technical solution, the pressure ring is sleeved on the outside of the bonding part of the electrode sheet and abuts against the upper surface of the support ring. The circumferential clamping force of the pressure ring presses the positioning section of the electrode sheet into the positioning groove, so that the electrode sheet is reliably fixed to the skeleton. The pressure ring also provides radial restraint to the bonding part, preventing the bonding part from peeling off from the outer peripheral surface of the main body, further ensuring the firmness of the electrode sheet.

[0031] Compared with the prior art, the present invention has, but is not limited to, the following main beneficial effects: 1. By using the positioning groove to independently limit the positioning section of the electrode connection part, and with the pressing action of the pressure ring on the positioning section, the position of the electrode on the frame is accurate and reliable, effectively preventing the radial displacement of the electrode during the rotation of the commutator, and ensuring the symmetry of the three electrodes and the stability of the commutation contact.

[0032] 2. Through the coordinated action of the guide ramp on the triangular plate, the avoidance ramp below the main body, and the positioning protrusion, a complete anti-snagging and anti-pressure structure is formed, which effectively avoids wire snagging and wire damage during the manufacturing and transportation of the commutator, thereby improving production efficiency and product qualification rate.

[0033] 3. The anti-detachment extension and arc-shaped transition structure at the free end of the contact section effectively prevent wire displacement from causing poor soldering, improve the reliability of the welding between the electrode sheet and the enameled wire, and extend the service life of the commutator.

[0034] 4. By suspending the main body with suspended feet, the electrical clearance between the main body and the mounting base is increased, which improves the insulation performance and electrical safety of the commutator, making the commutator suitable for high-voltage working environments.

[0035] 5. By using a one-to-one correspondence of three pole pieces distributed at 120-degree angles, three positioning grooves, three supporting corners, and three suspended feet, the dynamic balance accuracy and commutation contact uniformity during commutator rotation are ensured, thereby improving the stability of motor operation. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of a specific embodiment of the present invention; Figure 2 This is an exploded view of a specific embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the structure of the skeleton in a specific embodiment of the present invention. Figure 1 ; Figure 4 This is a schematic diagram illustrating the structure of the skeleton in a specific embodiment of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the structure of the electrode sheet in a specific embodiment of the present invention; Figure 6 This is a schematic diagram illustrating the structure of the connecting part in a specific embodiment of the present invention.

[0037] In the diagram: 100, skeleton; 101, main body; 102, opening; 103, support ring; 104, suspended foot; 105, positioning groove; 106, spacing section; 107, support sheet; 108, support corner; 109, flat surface; 110, guide slope; 111, avoidance slope; 112, positioning protrusion; 113, avoidance groove; 200, electrode sheet; 201, bonding part; 202, connecting part; 203, positioning section; 204, transition section; 205, contact section; 206, anti-detachment extension part; 300, pressure ring. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the embodiments of this invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0039] The following is combined with Figure 1-6 The technical solution of the present invention will be described in further detail below.

[0040] This embodiment provides a long-leg commutator, which is used in a motor as a core commutation component to achieve continuous motor rotation. This long-leg commutator achieves a comprehensive effect of reliable pole plate 200 positioning, no wire snagging or pressure, stable welding, and excellent insulation performance through the independent positioning groove 105 limiting the positioning section 203 of the pole plate 200, the anti-snagging and anti-pressure design of the guide slope and avoidance slope 111, the anti-fracture soldering design of the anti-detachment extension 206, and the suspended design of the main body 101 of the suspended support leg 104.

[0041] Please refer to the long-leg commutator of this embodiment, which mainly includes a frame 100, an electrode 200, and a pressure ring 300. The specific structure and connection relationship of each part are described below.

[0042] 100 skeleton The frame 100 serves as the support base for the long-leg commutator. The frame 100 is made of PPA, which has good high-temperature resistance. The frame 100 includes a main body 101, which is cylindrical with an internal axially oriented opening 102. A radially outwardly extending support ring 103 is integrally formed at the center of the main body 101, dividing it into an upper and lower region. The outer peripheral surface of the main body 101 above the support ring 103 is used to attach the electrode plate 200 to its mounting portion 201, while the portion of the main body 101 below the support ring 103 is used to house the suspended support leg 104.

[0043] The upper surface of the support ring portion 103 is provided with a positioning groove 105, which extends radially along the support ring portion 103 and is used to accommodate the positioning section 203 of the electrode 200. A gap section 106 is provided between the side of the positioning groove 105 near the main body portion 101 and the main body portion 101. The gap section 106 is a reserved gap area between the inner side of the positioning groove 105 and the outer peripheral surface of the main body portion 101, used for the bottom of the fitting portion 201 of the electrode 200 to abut and support it. The number of positioning grooves 105 corresponds one-to-one with the number of electrode 200s. In this embodiment, there are three positioning grooves 105, which are evenly distributed along the circumference of the support ring portion 103.

[0044] A support plate 107 is integrally formed on the lower surface of the support ring portion 103. The support plate 107 is a triangular plate. The triangular plate has three support corner portions 108, each of which extends radially out of the support ring portion 103 to provide support for the contact section 205 of the electrode 200. The ends of the three support corner portions 108 away from the support ring portion 103 are provided with straight surfaces 109, which provide a flat support reference for the contact section 205. The three support corner portions 108 are correspondingly arranged with three positioning grooves 105.

[0045] A guide slope is provided on the side of the triangular plate located between the two supporting corners 108, inclined toward the side of the support ring 103. The guide slope extends inclinedly from the side of the triangular plate toward the side of the support ring 103. During the manufacturing and transportation of the commutator, when the wire end comes into contact with the guide slope, the inclination angle of the guide slope causes the wire end to slide along the slope rather than hook onto the edge of the plate, thus preventing the wire from getting caught.

[0046] The main body 101, located below the support ring 103 and away from the support ring 103, has an upwardly inclined avoidance slope 111 on its bottom side facing away from the support ring 103. There are three avoidance slopes 111, each corresponding to one of the three support corner portions 108. The avoidance slopes 111 eliminate the sharp edges between the bottom and sides of the main body 101. When the wire passes under the main body 101, the avoidance slopes 111 guide the wire smoothly through, preventing wire compression.

[0047] The main body 101 has three positioning protrusions 112 along the axial direction on its outer peripheral surface below the support ring 103. The three positioning protrusions 112 are corresponding to three guide slopes. The positioning protrusions 112 extend along the axial direction of the main body 101 and form a raised guide structure on the outer peripheral surface of the main body 101 to guide the wire to pass along the outside of the positioning protrusions 112.

[0048] The main body 101, located below the support ring 103, extends axially from its bottom surface and is provided with three suspended legs 104. Each of the three suspended legs 104 corresponds to one of the three positioning protrusions 112, and the suspended legs 104 and positioning protrusions 112 are integrally formed. The suspended legs 104 extend axially downwards from below the main body 101, suspending the main body 101 above the mounting base, increasing the electrical clearance between the main body 101 and the mounting base, and improving the insulation performance and electrical safety of the commutator. The three suspended legs 104 are evenly distributed around the circumference of the main body 101, ensuring the stability of the main body 101 after suspension. Each suspended leg 104 has an inner side surface with a clearance groove 113. The three clearance grooves 113 are located circumferentially to the opening 102 in the main body 101, providing clearance space for installing shafts or other internal components, while also reducing the weight of the suspended legs 104.

[0049] 200g of high-performance film There are three electrodes 200, with an included angle of 120 degrees between them, and they are evenly distributed along the circumference of the frame 100. The electrode 200 is made of AuAg40 / AgCuNiRE, which has excellent electrical conductivity and wear resistance.

[0050] Each electrode 200 includes a bonding portion 201 and a connecting portion 202 connected to the bonding portion 201. The bonding portion 201 is arc-shaped and is bonded to the outer peripheral surface of the main body 101 above the support ring portion 103. The bottom of the bonding portion 201 abuts against the spacing section 106, which provides a support surface for the bonding portion 201, ensuring tightness and positional consistency between the bonding portion 201 and the outer peripheral surface of the main body 101.

[0051] The connecting portion 202 includes a positioning section 203, a transition section 204, and a contact section 205 integrally connected in sequence. The positioning section 203, transition section 204, and contact section 205 have an integral connection structure, resulting in good connection strength. The positioning section 203 is located in the positioning groove 105, which independently limits the positioning section 203, ensuring precise and reliable radial positioning of the electrode 200 on the frame 100. The transition section 204 abuts against the outer peripheral surface of the support ring portion 103 and extends outward from the positioning groove 105 to the support corner portion 108. The contact section 205 is supported on the support corner portion 108, and the flat surface 109 of the support corner portion 108 provides a stable support foundation for the contact section 205.

[0052] An anti-detachment extension 206 extends outward in the width direction of the contact section 205 at the end furthest from the transition section 204. An arc-shaped transition connection is used between the anti-detachment extension 206 and the contact section 205. After the enameled wire is soldered to the contact section 205, during subsequent winding or shaping processes, when the wire is subjected to tension, the anti-detachment extension 206 blocks the sliding of the wire, preventing the wire from shifting along the width direction of the contact section 205, which could lead to the solder joint cracking or forming a weak solder joint. The arc-shaped transition structure avoids damage to the wire from sharp edges, ensuring the reliability of the soldering and the integrity of the wire.

[0053] Pressure ring 300 The pressure ring 300 is ring-shaped and made of K-57 or HB-77 material, providing waterproof performance. The pressure ring 300 is fitted over the contact portion 201 of the electrode 200 and abuts against the upper surface of the support ring portion 103. The pressure ring 300 secures the electrode 200 to the frame 100 by pressing the positioning section 203 of the electrode 200 into the positioning groove 105. Simultaneously, the pressure ring 300 radially constrains the contact portion 201, preventing it from peeling off from the outer peripheral surface of the main body portion 101, further ensuring the firmness of the electrode 200's fixation.

[0054] Assembly process During assembly, the three electrode plates 200 are first installed onto the frame 100 in sequence. The contact portion 201 of each electrode plate 200 is attached to the outer peripheral surface of the main body 101 above the support ring portion 103, and the bottom of the contact portion 201 abuts against the spacing section 106 and the upper surface of the support ring portion 103. The positioning section 203 is embedded in the corresponding positioning groove 105 on the upper surface of the support ring portion 103, the transition section 204 abuts against the outer peripheral surface of the support ring portion 103, and the contact section 205 extends outward and is supported on the corresponding support corner portion 108.

[0055] After the three electrode plates 200 are installed, the pressure ring 300 is inserted from above the main body 101. The pressure ring 300 is fitted over the contact portion 201 of the three electrode plates 200 and pressed downwards until it abuts against the upper surface of the support ring portion 103. The pressure ring 300 presses the positioning section 203 of each electrode plate 200 into the corresponding positioning groove 105, thus fixing the electrode plates 200. The contact portion 201 of each electrode plate 200 is radially constrained by the pressure ring 300 and is tightly attached to the outer peripheral surface of the main body 101.

[0056] After assembly, the three pole pieces 200 are distributed at equal angles of 120 degrees. The positioning section 203, transition section 204, and contact section 205 of each pole piece 200 are precisely positioned, and the three support corners 108 of the support body 107 provide balanced support to the three contact sections 205. The suspended support leg 104 extends from below the main body 101, suspending the entire commutator above the mounting base.

[0057] Work process After the commutator is installed in the motor, the shaft passes through the internal opening 102 of the main body 101. The clearance groove 113 on the inner side of the suspended support 104 provides clearance space for the shaft or other internal components. The suspended support 104 suspends the main body 101, increasing the electrical clearance between the main body 101 and the mounting base, and ensuring insulation safety under high-voltage working conditions.

[0058] During the manufacturing process of the commutator, enameled wire is soldered to the contact sections 205 of each electrode 200. The anti-detachment extension 206 at the free end of the contact section 205 prevents the wire from sliding along the width of the contact section 205, thus preventing incomplete soldering. During the winding and shaping processes, when the wire passes the edge of the triangular plate, a guide ramp guides the wire to slide smoothly, preventing snagging; when the wire passes under the main body 101, a clearance ramp 111 and a positioning protrusion 112 guide the wire to pass along the outer side, preventing wire compression.

[0059] When the motor is working, the commutator rotates with the shaft, and the three pole pieces 200 contact the brushes to achieve commutation. Since the positioning section 203 of the pole piece 200 is reliably limited by the positioning groove 105 and the pressure ring 300, the pole piece 200 will not undergo radial displacement during high-speed rotation, ensuring the symmetry of the three pole pieces 200 and the uniformity of the commutation contact, thus ensuring the stability of the motor operation.

[0060] Material Selection Guide The electrode 200 is made of AuAg40 / AgCuNiRE, which combines good conductivity and wear resistance, meeting the requirements of the commutator under long-term high-speed rotation and frequent commutation contact conditions. The frame 100 is made of PPA, which has good high-temperature resistance and maintains dimensional stability at motor operating temperatures, ensuring the positioning accuracy of each electrode 200. The pressure ring 300 is made of K-57 or HB-77, which is waterproof and suitable for use in humid environments, improving the commutator's protection level and operational safety.

[0061] It should be understood that the above embodiments are merely illustrative examples and are not intended to limit the present invention. Based on the above embodiments, those skilled in the art can make appropriate adjustments and modifications to the specific shape and size of the skeleton 100, the number and material of the electrode plates 200, the specific shape and depth of the positioning groove 105, the specific structure of the support plate 107, the length and number of the suspended legs 104, and the material and size of the pressure ring 300, according to actual application requirements. Any modifications, equivalent substitutions, and improvements made within the spirit and scope of the claims of this invention should be included within the scope of protection of this invention.

Claims

1. A long-leg commutator, comprising a frame (100), an electrode (200), and a retaining ring (300), wherein the electrode (200) is mounted on the frame (100), and the retaining ring (300) is sleeved on the frame (100) and positions the electrode (200) on the frame (100), characterized in that, The skeleton (100) includes a main body (101), which is a column with an internal axial hole (102). A radially outwardly extending support ring (103) is integrally provided at the middle position of the main body (101), and a positioning groove (105) is provided on the upper surface of the support ring (103). The electrode (200) includes a bonding portion (201) and a connecting portion (202) connected to the bonding portion (201). The bonding portion (201) is bonded to the outer peripheral surface of the main body portion (101) located above the support ring portion (103). The connecting portion (202) includes a positioning section (203), a transition section (204), and a contact section (205) integrally connected in sequence. The positioning section (203) is located in the positioning groove (105), and the transition section (204) abuts against the outer peripheral surface of the support ring portion (103). The lower surface of the support ring (103) is integrally provided with a support plate (107), the support plate (107) has a support corner (108) extending outward from the support ring (103), the support corner (108) is correspondingly provided with the positioning groove (105), and the contact section (205) is supported on the support corner (108); The bottom surface of the main body (101) located below the support ring (103) extends axially from the main body (101) and is provided with a suspended support (104). The suspended support (104) is provided corresponding to the support corner (108) and is used to suspend the main body (101).

2. The long-leg commutator according to claim 1, characterized in that, The electrode (200) is provided in three parts, and the included angle between the three electrode (200) is 120 degrees. The number of positioning grooves (105) is arranged one-to-one with the number of electrode (200). The support plate (107) is a triangular plate with three support corners (108), and the three support corners (108) are arranged one-to-one with the three positioning grooves (105).

3. The long-leg commutator according to claim 1, characterized in that, The positioning groove (105) has a gap section (106) between its side near the main body (101) and the main body (101), and the bottom of the fitting part (201) abuts against the gap section (106).

4. The long-leg commutator according to claim 2, characterized in that, All three support corner portions (108) extend radially out of the support ring portion (103), and the ends of the three support corner portions (108) away from the support ring portion (103) are provided with straight surfaces (109).

5. The long-leg commutator according to claim 2, characterized in that, The triangular piece has a guide slope on the side between the two support corners (108) that is inclined toward the side of the support ring (103), and the guide slope is used to prevent the wire from getting caught.

6. The long-leg commutator according to claim 2, characterized in that, The main body (101) is located below the support ring (103) and has an upwardly inclined avoidance slope (111) on the side of the main body (101) away from the support ring (103). There are three avoidance slopes (111), and the three avoidance slopes (111) are arranged one-to-one with the three support corners (108). The avoidance slopes (111) are used to prevent pressing on the line.

7. The long-leg commutator according to claim 5, characterized in that, The main body (101) is located below the support ring (103) and has three positioning protrusions (112) along the axial direction on its outer peripheral surface. The three positioning protrusions (112) are arranged in a one-to-one correspondence with the three guide slopes. The positioning protrusions (112) are used to prevent the wire from being pressed.

8. The long-leg commutator according to claim 7, characterized in that, The suspended support (104) is provided in three parts, and the three suspended support (104) are arranged in a one-to-one correspondence with the three positioning protrusions (112). The suspended support (104) and the positioning protrusions (112) are integrally formed.

9. The long-leg commutator according to claim 8, characterized in that, Each of the suspended legs (104) has an inner side provided with a relief groove (113), and the three relief grooves (113) are located around the opening (102) of the main body (101).

10. The long-leg commutator according to claim 1 or 2, characterized in that, One end of the contact segment (205) away from the transition segment (204) extends outward in the width direction of the contact segment (205) and is provided with an anti-detachment extension (206). The anti-detachment extension (206) and the contact segment (205) are arc-shaped transitions. The anti-detachment extension (206) and the arc-shaped transition are used to prevent the winding displacement from causing poor soldering. The pressure ring (300) is ring-shaped. The pressure ring (300) is sleeved on the fitting part (201) and abuts against the upper surface of the support ring part (103), and presses the positioning segment (203) into the positioning groove (105).

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