Copper shell structure
By setting a notch groove on the copper shell structure and filling it with an insulating matrix, the problem of paint dripping into the insulating groove is solved, and the stable operation of the motor and the improvement of the structural strength are achieved.
Patent Information
- Application Number
- CN202422663713.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-10-31
AI Technical Summary
The end of the insulation slot of the existing commutator facing the wire hanging part is not blocked by the insulation base, which makes it easy for paint to drip into the insulation slot, affecting the performance stability of the motor.
A notch groove is set on the cylindrical copper shell body of the copper shell structure, and an insulating matrix is filled during the milling process to ensure that the insulating groove and the spacing groove are not penetrated, thereby blocking the route of paint dripping to the insulating groove.
It effectively prevents paint from dripping into the insulation slot, ensuring the stability and structural strength of the motor running at a higher speed.
Smart Images
Figure CN223436783U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a commutator technical field, concretely relates to a copper shell structure. BACKGROUND
[0002] With the continuous development of human society, people use more and more electric tools in life to provide convenience for life, especially in the automobile industry, more and more automatic devices are used, and the use of motors and commutators is also more and more, and the performance requirements of the motor are also higher and higher, especially the stability and service life of the motor.
[0003] The motor will vibrate during high-speed operation. In order to prevent the vibration of the motor from causing the winding of the hanging line 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 hanging line part of the commutator. Most of the existing commutators generally adopt copper shell formed by punching and bending of copper plate, and the copper shell is injection molded with an insulating base after cleaning, then a pin is turned on the copper shell, a groove is milled 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 hanging line part, and penetrates the insulating base, so that the end of the insulating groove towards the hanging line part is not blocked by the insulating base. In the process of fixing the winding of the hanging line part of the commutator by using the paint dripping process, the paint dripping is easy to enter the insulating groove along the hanging line part, resulting in unstable performance of the motor equipped with the above-mentioned commutator. SUMMARY
[0004] Therefore, the utility model provides a copper shell structure to solve the problem that after a plurality of commutator segments insulated by the insulating groove are obtained by milling grooves on the copper shell injection molded with the insulating base, the end of the insulating groove towards the hanging line part is not blocked by the insulating base.
[0005] The utility model provides a copper shell structure, including cylindrical copper shell main part, be provided with center shaft hole in the cylindrical copper shell main part, the cylindrical copper shell main part is along the axial one end and is arranged with a plurality of hanging line parts along the circumference interval, the interval groove is formed to the clamping area between adjacent two hanging line parts, the end face of the cylindrical copper shell main part is along the axial towards the position of the interval groove of the hanging line part is concave with a notch groove, and the notch groove is used for filling the insulating base.
[0006] According to the copper shell structure of the utility model, at least has following beneficial effect:
[0007] By setting a notch groove at the position corresponding to each interval groove on the end face of the cylindrical copper shell body towards the hanging wire part, filling the notch groove with the insulating base body, and setting the end of the notch groove away from the interval groove along the axial direction to provide space for the circular milling cutter to mill through the cylindrical copper shell body, when the cylindrical milling cutter mills the groove at the position where the notch groove is located on the same straight line along the axial direction of the cylindrical copper shell body, and the cylindrical copper shell body is penetrated along the axial direction to obtain the insulating groove, it can be ensured that the circular milling cutter does not mill through the insulating base body in the notch groove, i.e. the notch groove is always at least partially filled with the insulating base body, ensuring that the insulating groove and the interval groove are not penetrated, thereby ensuring that in the process of fixing the winding wire on the hanging wire part of the commutator made of the copper shell structure by using the paint dripping process, the insulating base body filled in the notch groove blocks the route of the paint flowing to the insulating groove, effectively preventing the paint from entering the insulating groove, ensuring the paint effect, and further ensuring the stability of the motor equipped with the commutator made of the copper shell structure in high-speed operation.
[0008] In an alternative embodiment, an inclined groove is set at the position where the inner wall of the cylindrical copper shell body is located on the same straight line along the axial direction of each notch groove, the inclined groove communicates with the notch groove, the inclined groove extends from outside to inside along the radial direction of the cylindrical copper shell body, and is arranged downwardly inclined.
[0009] In an alternative embodiment, the ratio of the axial dimension of the notch groove to the axial dimension of the cylindrical copper shell body is set to 0.08 to 0.09.
[0010] In an alternative embodiment, the hanging wire part is connected to the cylindrical copper shell body through a fixed part; the width dimension of the fixed part is greater than the width dimension of the hanging wire part.
[0011] In an alternative embodiment, the fixed part is set in the shape of an isosceles trapezoid, the end of the fixed part connected to the hanging wire part is set as a small-diameter end, the width dimension of the small-diameter end is equal to the width dimension of the hanging wire part, and the end of the fixed part connected to the cylindrical copper shell body is set as a large-diameter end.
[0012] In an alternative embodiment, a hook part is set at the position where the inner wall of the cylindrical copper shell body is located on the same straight line along the axial direction of each hanging wire part, the hook part extends towards the center of the cylindrical copper shell body along the radial direction of the cylindrical copper shell body; the end of the hook part towards the hanging wire part is folded inwardly to form an inclined part, the inclined part extends from outside to inside along the radial direction of the cylindrical copper shell body, and is arranged upwardly inclined.
[0013] In an alternative embodiment, the hook portion is provided with a groove along a radially inward side of the cylindrical copper shell body, the groove extending through the hook portion in an axial direction away from a lower end surface of the inclined member.
[0014] In an alternative embodiment, the inner wall of the cylindrical copper shell body is provided with two annular grooves in an axial direction, the two annular grooves being used to sequentially separate the hook portion into a first segment, a second segment and a third segment in an axial direction from top to bottom, and the inclined member is arranged in the first segment.
[0015] In an alternative embodiment, the second segment and the third segment are identical in structure, and both end surfaces of the second segment in an axial direction are provided as inclined surfaces extending from outside to inside in a radial direction of the cylindrical copper shell body and arranged in a downward inclination.
[0016] In an alternative embodiment, an included angle between the arrangement direction of the inclined member and the axial direction is set to 45°. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0018] Figure 1 Fig. 1 is a perspective structural schematic view of a copper shell structure according to an embodiment of the present application;
[0019] Figure 2 Fig. 2 is an enlarged schematic view of position A in Fig. 1; Figure 1
[0020] Figure 3 Fig. 3 is a perspective structural schematic view from another angle of the copper shell structure according to the embodiment of the present application; Figure 1
[0021] Figure 4 Fig. 4 is a main view structural schematic view of a cut of the copper shell structure according to the embodiment of the present application;
[0022] Figure 5 Fig. 5 is an enlarged schematic view of position B in Fig. 4; Figure 4
[0023] Fig. 6 is an enlarged schematic view of position C in Fig. 4. Figure 6 Figure 4
[0024] Legend of reference signs:
[0025] 100 - cylindrical copper shell body, 110 - notch groove, 120 - inclined groove, 130 - annular groove
[0026] 210 - hanging wire part, 211 - interval groove, 220 - fixing part
[0027] 300 - hook part, 310 - inclined piece, 320 - groove, 330 - first section, 340 - second section, 341 - inclined surface, 350 - third section DETAILED DESCRIPTION
[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative efforts fall within the protection scope of the utility model.
[0029] In the description of the present embodiment, 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 shown in the drawings, and are only for the convenience of describing the present embodiment 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 embodiment. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0030] In the description of the present embodiment, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" 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; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.
[0031] The motor will vibrate during operation at a high rotating speed, in order to prevent the vibration of the motor from causing the winding wire of the winding arranged on the commutator to be disconnected from the hanging wire part of the commutator, thus causing a motor failure, a paint dripping process is usually used to fix the winding wire of the winding on the hanging wire part of the commutator. The commutator applied to the motor operating at a high rotating speed in the related art is generally formed by punching and bending a copper plate, and then the copper shell is injection molded with an insulating base after cleaning, then the copper shell is punched and milled to form a plurality of insulating grooves, so that the insulating grooves split the copper shell into a plurality of commutator segments insulated and separated 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 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, and in the process of fixing the winding wire of the winding on the hanging wire part of the commutator by using the paint dripping process, the paint dripping is easy to enter the insulating groove along the hanging wire part, thus causing the use performance of the motor assembled with the above-mentioned commutator to be unstable. In order to solve the above technical defects, the copper shell structure provided in the embodiments of the present application is provided.
[0032] The embodiments of the present application will be described below in combination with Figures 1 to 6 .
[0033] According to the copper shell structure provided in the embodiments of the present application, a plurality of hanging wire parts 210 are arranged on the end of the cylindrical copper shell body 100 along the axial direction, and the gap groove 211 is formed between the adjacent two hanging wire parts 210, and the notch groove 110 is arranged on the end face of the cylindrical copper shell body 100 corresponding to the position of the gap groove 211, so that the insulating base can be filled in the notch groove 110, and the paint dripping process can be used to fix the winding wire of the winding on the hanging wire part of the commutator, so that the paint dripping process is prevented from entering the insulating groove along the hanging wire part, thus improving the use performance of the motor assembled with the commutator. Figure 1 Figure 1 Figure 4
[0034] The copper shell structure of the embodiment is recessed with a notch groove 110 at the position corresponding to each interval groove 211 on the end surface of the cylindrical copper shell body 100 towards the hanging wire part 210. After the copper shell structure of the embodiment is integrally injection molded with the insulating base, the insulating groove is processed by using a circular milling cutter to mill the groove. Because the notch groove 110 is filled with the insulating base, and the end of the notch groove 110 axially away from the interval groove 211 is used to provide a space for the circular milling cutter to mill through the cylindrical copper shell body 100, when the circular milling cutter mills the groove at the position on the cylindrical copper shell body 100 axially located on the same straight line with the notch groove 110, and the cylindrical copper shell body 100 is axially penetrated to obtain the insulating groove, it can be ensured that the circular milling cutter does not mill through the insulating base in the notch groove 110, that is, the notch groove 110 is always at least partially filled with the insulating base, and it is ensured that the insulating groove and the interval groove 211 are not penetrated, thereby ensuring that in the process of fixing the winding around the commutator made of the copper shell structure of the embodiment by using the drop painting process, the insulating base filled in the notch groove 110 blocks the route of the drop painting flowing to the insulating groove, effectively avoids the drop painting entering the insulating groove, ensures the drop painting effect, and further ensures the stability of the motor equipped with the commutator made of the copper shell structure of the embodiment in high-speed operation.
[0035] As Figure 2 , Figure 4 and Figure 5As shown, in some embodiments, the inner wall of the cylindrical copper shell body 100 is recessed with an inclined groove 120 at a position axially aligned with each of the notch groove 110, the inclined groove 120 is in communication with the notch groove 110, the inclined groove 120 extends radially from outside to inside of the cylindrical copper shell body 100, and is arranged downwardly inclined. Considering the process of milling the insulation groove on the cylindrical copper shell body 100 at the position axially aligned with the notch groove 110 by using a circular milling cutter, in order to reduce the damage to the insulation base in the cylindrical copper shell body 100, the circular milling cutter is usually aligned axially with the inner wall of the cylindrical copper shell body 100 at the end of the cylindrical copper shell body 100 radially inward; but when the highest point of the circular milling cutter is flush with the lowest point of the notch groove 110, the circular arc of the circular milling cutter cannot mill the surrounding wall of the cylindrical copper shell body 100 axially, and it is necessary to move the circular milling cutter at least partially into the notch groove 110 to ensure that the surrounding wall of the cylindrical copper shell body 100 is milled axially, which has the risk of milling the insulation base in the notch groove 110; this embodiment recesses the inclined groove 120 on the inner wall of the cylindrical copper shell body 100 corresponding to the position in communication with the notch groove 110, 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 notch groove 110 in advance, and ensures that the surrounding wall of the cylindrical copper shell body 100 is milled axially to obtain the insulation groove without the need to move the circular milling cutter at least partially into the notch groove 110, thereby reducing or even eliminating the risk of milling the insulation base in the notch groove 110.
[0036] In some embodiments, the ratio of the axial dimension of the notch groove 110 to the axial dimension of the cylindrical copper shell body 100 is set to 0.08 to 0.09. Using copper shell structures with the same other size parameters and only different ratio of the axial dimension of the notch groove 110 to the axial dimension of the cylindrical copper shell body 100, the commutators obtained after injection molding of the insulating base into the copper shell structure and milling of the grooves are tested, and whether the insulating base in the notch groove 110 is milled through and the strength of the commutator is obtained. The specific copper shell structures selected are numbered as follows: ①, the ratio of the axial dimension of the notch groove 110 to the axial dimension of the cylindrical copper shell body 100 is set to 0.07, in detail, the axial dimension of the cylindrical copper shell body 100 is 20 mm, and the axial dimension of the notch groove 110 is set to 1.4 mm; ②, the ratio of the axial dimension of the notch groove 110 to the axial dimension of the cylindrical copper shell body 100 is set to 0.08, in detail, the axial dimension of the cylindrical copper shell body 100 is 20 mm, and the axial dimension of the notch groove 110 is set to 1.6 mm; ③, the ratio of the axial dimension of the notch groove 110 to the axial dimension of the cylindrical copper shell body 100 is set to 0.09, in detail, the axial dimension of the cylindrical copper shell body 100 is 20 mm, and the axial dimension of the notch groove 110 is set to 1.8 mm; ④, the ratio of the axial dimension of the notch groove 110 to the axial dimension of the cylindrical copper shell body 100 is set to 0.10, in detail, the axial dimension of the cylindrical copper shell body 100 is 20 mm, and the axial dimension of the notch groove 110 is set to 2.0 mm. After injection molding of the insulating base into the above numbered copper shell structures and milling of the grooves to obtain the insulating grooves, the test results of the commutators obtained are analyzed to obtain: the insulating base in the notch groove 110 of the commutator obtained by using the copper shell structure numbered ① is milled through, and the structural strength is high; the insulating base in the notch groove 110 of the commutator obtained by using the copper shell structure numbered ② is not milled through, and the structural strength is slightly lower than that of the commutator obtained by using the copper shell structure numbered ①, but there is no obvious difference; the insulating base in the notch groove 110 of the commutator obtained by using the copper shell structure numbered ③ is not milled through, and the structural strength is slightly lower than that of the commutator obtained by using the copper shell structure numbered ②, but there is no obvious difference; the insulating base in the notch groove 110 of the commutator obtained by using the copper shell structure numbered ④ is not milled through, but the structural strength is obviously lower than that of the commutator obtained by using the copper shell structure numbered ③.
[0037] As Figure 1 , Figure 2 and Figure 5As shown in the drawings, in some embodiments, the wire hanging part 210 is connected to the cylindrical copper shell body 100 through a fixing part 220; the width dimension of the fixing part 220 is greater than that of the wire hanging part 210. The fixing part 220 with a greater width dimension increases the connection area with the cylindrical copper shell body 100, thereby ensuring the connection strength of the wire hanging part 210 with the cylindrical copper shell body 100 and the stability of the motor equipped with the commutator made of the copper shell structure of the present embodiment in use at a high rotating speed.
[0038] As shown in the drawings, Figure 5 , specifically, the fixing part 220 is provided in the shape of an isosceles trapezoid, one end of the fixing part 220 connected to the wire hanging part 210 is provided as a small-diameter end with a width dimension equal to that of the wire hanging part 210, and the other end of the fixing part 220 connected to the cylindrical copper shell body 100 is provided as a large-diameter end. By providing the fixing part 220 in the shape of an isosceles trapezoid with a narrow top and a wide bottom, the interference fit with the injection mold can be ensured in the process of integrally injection molding the copper shell structure of the present embodiment with the insulating base, thereby avoiding the occurrence of flash during the injection molding process.
[0039] As shown in the drawings, Figure 1 , Figure 2 , Figure 4 , and Figure 5 , in some embodiments, the inner wall of the cylindrical copper shell body 100 is provided with a hook part 300 at a position axially aligned with each of the wire hanging parts 210, the hook part 300 extends along the radial direction of the cylindrical copper shell body 100 towards the center of the cylindrical copper shell body 100; the hook part 300 is inwardly folded at one end axially towards the wire hanging part 210 to form an inclined part 310 extending from outside to inside along the radial direction of the cylindrical copper shell body 100 and upwardly inclined. By inwardly protruding the hook part 300 along the radial direction of the cylindrical copper shell body 100 on the inner wall of the cylindrical copper shell body 100, the hook part 300 can be embedded in the insulating base in the process of integrally injection molding the copper shell structure of the present embodiment with the insulating base, thereby ensuring the stability and strength of the combination of the copper shell structure of the present embodiment with the insulating base; meanwhile, the hook part 300 is inwardly folded at one end axially towards the wire hanging part 210 to form the inclined part 310 extending along the radial direction of the cylindrical copper shell body 100, the inclined inclined part 310 can increase the radial and axial tensile resistance of the combination of the copper shell structure of the present embodiment with the insulating base, thereby further improving the combination strength of the copper shell structure of the present embodiment with the insulating base.
[0040] Specifically, the hook portion 300 is provided with a groove 320 on the side facing the inside of the radial direction of the cylindrical copper shell body 100, and the groove 320 penetrates the hook portion 300 in the axial direction away from the lower end surface of the inclined piece 310. In the process of integrally injection molding the copper shell structure of the present embodiment with the insulating base, the insulating base can be filled into the groove 320, that is, the part of the insulating base located in the groove 320 is limited in the circumferential direction by the two surrounding walls of the groove 320, further increasing the circumferential tensile resistance of the copper shell structure of the present embodiment combined with the insulating base; and the inclined piece 310 covers the top end of the groove 320, so that the part of the insulating base located in the groove 320 is in contact with the bottom end surface of the inclined piece 310, and cooperates with the part of the insulating base covering the upper end surface of the inclined piece 310, further increasing the axial tensile resistance of the copper shell structure of the present embodiment combined with the insulating base.
[0041] Specifically, the included angle between the arrangement direction of the inclined piece 310 and the axial direction is set to 45°. The inclined piece 310 arranged at an angle of 45° can better increase the axial tensile resistance of the copper shell structure of the present embodiment combined with the insulating base.
[0042] As shown in Figure 3 , Figure 4 and Figure 6 , specifically, the inner wall of the cylindrical copper shell body 100 is provided with two annular grooves 130 spaced apart in the axial direction, and the two annular grooves 130 are used to sequentially separate the hook portion 300 from top to bottom in the axial direction into a first section 330, a second section 340 and a third section 350, and the inclined piece 310 is arranged in the first section 330. In the process of integrally injection molding the copper shell structure of the present embodiment with the insulating base, the two annular grooves 130 are filled with the insulating base, so that the interval area between the first section 330 and the second section 340 and the interval area between the second section 340 and the third section 350 are both filled with the insulating base, so that the first section 330 and the second section 340 cooperatively limit the axial freedom of the insulating base part located in the interval area therebetween, and the second section 340 and the third section 350 cooperatively limit the axial freedom of the insulating base part located in the interval area therebetween, thereby further increasing the axial tensile resistance of the copper shell structure of the present embodiment combined with the insulating base.
[0043] As shown in Figure 3 and Figure 6As shown, specifically, the second section 340 and the third section 350 are structurally identical, both ends of the second section 340 in the axial direction are provided as inclined surfaces 341, the inclined surfaces 341 extend from outside to inside in the radial direction of the cylindrical copper shell body 100, and are provided in a downward inclined manner. In the process of integrally injection molding the copper shell structure of the embodiment with the insulating base, the inclined inclined surfaces 341 further increase the radial and axial tensile resistance of the second section 340 and the third section 350 and the insulating base, and further improve the bonding strength of the copper shell structure of the embodiment and the insulating base.
[0044] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the present application.
Claims
1. A copper shell structure, characterized in that: The invention comprises a cylindrical copper shell body (100), wherein a central axis hole is provided in the cylindrical copper shell body (100), a plurality of wire hanging portions (210) are arranged at intervals along the circumferential direction at one end of the cylindrical copper shell body (100) along the axial direction, a spacing groove (211) is formed in the sandwiched area between two adjacent wire hanging portions (210), and a notch groove (110) is concavely provided at a position corresponding to the spacing groove (211) on the end surface of the cylindrical copper shell body (100) facing the wire hanging portion (210) along the axial direction, and the notch groove (110) is used to fill an insulating matrix.
2. A copper shell structure according to claim 1, characterized in that: An inclined groove (120) is recessed at a position where the inner wall of the cylindrical copper shell body (100) and each of the notched grooves (110) are in the same straight line along the axial direction. The inclined groove (120) is communicated with the notched groove (110). The inclined groove (120) extends from the outside to the inside along the radial direction of the cylindrical copper shell body (100) and is arranged to be inclined downward.
3. The copper shell structure according to claim 1, characterized in that: The ratio of the axial dimension of the notch groove (110) to the axial dimension of the cylindrical copper shell body (100) is set to 0.08 to 0.
09.
4. The copper shell structure according to claim 1, characterized in that: The wire hanging portion (210) is connected to the cylindrical copper shell body (100) via a fixing portion (220); the width of the fixing portion (220) is greater than the width of the wire hanging portion (210).
5. A copper shell structure according to claim 4, characterized in that: The fixing portion (220) is configured as an isosceles trapezoidal shape, one end of the fixing portion (220) connected to the wire hanging portion (210) is configured as a small-diameter end, the width of the small-diameter end being equal to the width of the wire hanging portion (210), and one end of the fixing portion (220) connected to the cylindrical copper shell body (100) is configured as a large-diameter end.
6. The copper shell structure according to claim 1, characterized in that: A hook portion (300) is provided on the inner wall of the cylindrical copper shell body (100) at a position axially located in the same straight line as each of the line hanging portions (210); the hook portion (300) extends radially of the cylindrical copper shell body (100) toward the center of the cylindrical copper shell body (100); one end of the hook portion (300) is folded inwardly toward the line hanging portion (210) along the axial direction to form an inclined member (310); the inclined member (310) extends radially from the outside to the inside of the cylindrical copper shell body (100) and is arranged to be inclined upward.
7. The copper shell structure according to claim 6, characterized in that: The hook portion (300) is provided with a groove (320) along a radially inward side of the cylindrical copper shell body (100), and the groove (320) penetrates the hook portion (300) along the axial direction away from the lower end surface of the inclined member (310).
8. The copper shell structure according to claim 7, characterized in that: The inner wall of the cylindrical copper shell body (100) is provided with two annular grooves (130) spaced apart in the axial direction, and the two annular grooves (130) are used to separate the hook portion (300) into a first section (330), a second section (340) and a third section (350) in sequence from top to bottom in the axial direction, and the inclined member (310) is provided in the first section (330).
9. The copper shell structure according to claim 8, characterized in that: The second section (340) and the third section (350) have the same structure. Both end surfaces of the second section (340) along the axial direction are arranged as inclined surfaces (341). The inclined surfaces (341) extend from the outside to the inside along the radial direction of the cylindrical copper shell body (100) and are arranged to be inclined downward.
10. The copper shell structure according to claim 6, characterized in that: The angle between the arrangement direction of the inclined member (310) and the axial direction is set to 45°.