Hairpin bending mechanism

Abstract

The invention relates to a hairpin bending mechanism which comprises a wire feeding mold and a wire folding assembly. A bending part eccentrically mounted on the rotating plate; the first driving part is used for driving the rotating plate to rotate around the axis; and the second driving part is used for driving the rotating plate to move in the height direction. When the other side of the copper wire needs to be bent, the second driving part drives the rotating plate to drive the bending part to move in the height direction and to be separated from the copper wire, then under the rotating effect of the rotating plate, the bending part moves to the other side of the copper wire, and the second driving part drives the rotating plate to drive the bending part to move in the axis direction to reset. Therefore, the copper wire can be bent from the other side. The double-side bending of the copper wire can be realized only through one bending part, fixed mounting spaces do not need to be reserved on the two sides of the copper wire, the bending angle and the span are only determined by the motion trail of the bending part and can be flexibly adjusted through a program, and the limitation of the bending angle and the span caused by multiple bending parts is overcome.

Description

Technical Field

[0001] This disclosure relates to the field of motor stator flat wire forming technology, specifically, to a hairpin bending mechanism. Background Technology

[0002] In the field of bending and forming stator hairpins for flat wire motors, the main technology involves arranging multiple independent bending components on both sides of the flat wire. This type of structure achieves a U-shaped bend through the coordinated action of two or more bending structures in fixed positions. However, in this method, the dimensions, number, and spacing of the bending structures are relatively fixed in the mechanical layout, directly limiting the range of bending angles and span dimensions of the U-shaped hairpins that can be formed. Summary of the Invention

[0003] The purpose of this disclosure is to provide a hairpin bending mechanism to at least partially solve the problems existing in the related art.

[0004] To achieve the above objectives, this disclosure provides a hairpin bending mechanism, including a wire feeding mold for providing copper wire to be bent and a bending assembly for receiving the copper wire and bending the copper wire, the bending assembly comprising: Rotating plate; The bent portion is eccentrically mounted on the rotating plate; A first driving unit is used to drive the rotating plate to rotate about its axis; and The second drive unit is used to drive the rotating plate to move along the height direction.

[0005] According to some possible embodiments, the second driving unit includes: Lifting components; A connecting rod, one end of which is connected to the lifting member; and A connector is fixed to the bottom of the rotating plate, and the other end of the connecting rod is rotatably connected to the connector.

[0006] According to some possible embodiments, the first driving unit includes: Electric motor; The first gear is connected to the output shaft of the motor; The second gear meshes with the first gear, and the second gear is arranged coaxially with the rotating plate. A guide structure for guiding along the height direction and eccentrically disposed on the second gear; and The guide shaft has one end extending into the guide structure and the other end eccentrically connected to the rotating plate. When the rotating plate moves along the height direction, the end of the guide shaft away from the rotating plate is always located within the guide structure.

[0007] According to some possible embodiments, the guide structure includes a first through hole formed in the second gear and a guide bearing disposed within the first through hole.

[0008] According to some possible embodiments, the lifting member is coaxially disposed on the side of the second gear opposite to the rotating plate, and the second gear has a second through hole through which the connecting rod passes, so as to allow the second gear to rotate relative to the connecting rod.

[0009] According to some possible embodiments, the device further includes a bearing housing disposed between the lifting member and the second gear, the bearing housing housing containing a support bearing, and the second gear being mounted on the support bearing. The bearing housing has a through third hole in the middle, through which the connecting rod passes.

[0010] According to some possible embodiments, the system further includes a first mounting plate and a second mounting plate that are at an angle to each other, the motor and the lifting member being disposed on the lower side of the first mounting plate, the first gear and the second gear being disposed on the upper side of the first mounting plate, the rotating plate being located on the upper side of the second gear, the second mounting plate being located on the second side of the first mounting plate, and the wire feeding mold being mounted on the side of the second mounting plate away from the first mounting plate.

[0011] According to some possible embodiments, the wire feeding mold has a wire groove for feeding the copper wire, and the hairpin bending mechanism further includes a support plate for carrying the copper wire, the upper surface of which is flush with the bottom of the wire groove to receive the copper wire from the wire groove.

[0012] According to some possible embodiments, the rotating plate is located below the support plate, and the support plate has an arc-shaped hole so that the bent portion extends from the rotating plate to the upper side of the support plate and can rotate with the rotating plate within the arc-shaped hole.

[0013] According to some possible embodiments, the bending portion includes: Bending wheels; and A rotating shaft is connected at one end to the rotating plate, and the bending wheel is rotatably mounted at the other end of the rotating shaft. The outer contour of the bending wheel along the axial direction is composed of multiple straight line segments and multiple arc segments alternating in sequence.

[0014] According to some possible embodiments, the bending portion further includes a mounting base fixed to the rotating plate, and one end of the rotating shaft away from the bending wheel is connected to the mounting base.

[0015] According to some possible embodiments, the bending portion further includes a rotary bearing sleeved on the rotating shaft, and the bending wheel is sleeved on the rotary bearing.

[0016] With the above technical solution, when bending copper wire, the wire is fed to the bending assembly by a wire feeding mold, at which time the bending part is located... Figure 5 The upper state in the middle, and the bending part is like Figure 7 As shown, located on the first side of the copper wire, a first drive unit drives a rotating plate, causing the bending part to rotate accordingly, thereby achieving the bending operation of the copper wire. When bending is required from the other side of the copper wire, a second drive unit drives the rotating plate, causing the bending part to move in the axial direction (height direction) to... Figure 6 The lower position shown is freed from the copper wire constraint, and then, under the rotation of the rotating plate, the bending part moves to... Figure 8 The image shown is located on the other side of the copper wire. At this time, the second drive unit drives the rotating plate to move the bending part in the axial direction to reset. Figure 5 In the upper position, the copper wire can be bent from the other side. This design allows for bending of both sides of the copper wire using only one bending section, eliminating the need to reserve fixed installation space on both sides of the copper wire. The bending angle and span are determined solely by the movement trajectory of this bending section and can be flexibly adjusted via a program, overcoming the limitations of bending angle and span caused by multiple bending components.

[0017] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a hairpin bending mechanism exemplarily shown according to this disclosure; Figure 2 This is a schematic diagram of a hairpin bending mechanism exemplarily shown according to this disclosure, wherein the support plate is omitted; Figure 3 This is a schematic diagram of a hairpin bending mechanism exemplarily shown according to the present disclosure, wherein the support plate, rotating plate and bending part are omitted; Figure 4 yes Figure 1 The front cross-sectional view of the hairpin bending mechanism is shown in the figure; Figure 5 yes Figure 1 The image shows a front view of the hairpin bending mechanism, with the bending part in the upper position. Figure 6 yes Figure 1The image shows a front view of the hairpin bending mechanism, with the bending portion in the lower position. Figure 7 This is a top view of a hairpin bending mechanism exemplarily shown according to the present disclosure, wherein the bending portion is located on the first side of the copper wire; Figure 8 This is a top view of a hairpin bending mechanism exemplarily shown according to the present disclosure, wherein the bending portion is located on the second side of the copper wire; Figure 9 This is a front cross-sectional view of a bent portion exemplarily shown according to this disclosure; Figure 10 This is a top view of a bending wheel exemplarily shown according to this disclosure.

[0019] Explanation of reference numerals in the attached figures 1-Copper wire; 2-Wire feeding mold; 201-Wire groove; 3-Folding wire assembly; 4-Rotating plate; 5-Bending section; 51-Bending wheel; 501-Straight section; 502-Arc section; 52-Rotating shaft; 53-Mounting base; 54-Rotating bearing; 55-Support sleeve; 6-First drive unit; 61-Motor; 62-First gear; 63-Second gear; 631-Second through hole; 64-Guide structure; 65-Guide shaft; 7-Second drive unit; 71-Lifting component; 72-Connecting rod; 73-Connector; 81-Bearing seat; 811-Third through hole; 82-Support bearing; 91-First mounting plate; 92-Second mounting plate; 921-Opening; 93-Support column; 10-Bearing plate; 101-Arc hole; 11-Reducer; 12-Base; 13-Cover; 14-Snap ring; 15-Locking nut. Detailed Implementation

[0020] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0021] In this disclosure, unless otherwise stated, directional terms such as "inner," "outer," "upper," "lower," and "top" or "bottom" may refer to the outline of the corresponding component itself, or to the positional relationship between the component and other components during use. For example, "bottom" of the rotating plate refers to the side of the rotating plate facing the ground during use, i.e., the lower side of the rotating plate; "guide bearing" located "inside" the first through hole refers to the guide bearing being located within the receiving space of the first through hole; "lower side" of the first mounting plate refers to the side facing the ground during use, and "upper side" of the first mounting plate refers to the side facing away from the bottom surface during use. The term "height direction" refers to the direction perpendicular to the ground during use of the bending mechanism, and also corresponds to the aforementioned "upper," "lower," and "top," "bottom."

[0022] In addition, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0023] Reference Figures 1-2 This disclosure provides a hairpin bending mechanism, including a wire feeding mold 2 for providing a copper wire 1 to be bent and a bending assembly 3 for receiving the copper wire 1 and bending it. In the actual bending process, the copper wire 1 is fed forward through the wire feeding mold 2 to the bending assembly 3, and then the bending assembly 3 bends the copper wire 1 at the corresponding position. This disclosure does not limit the specific structure of the wire feeding mold 2; its purpose is to enable the copper wire 1 to enter the area of ​​the bending assembly 3 at a preset angle and position, so as to facilitate bending according to a preset procedure. The specific structure of the wire feeding mold 2 will be described below.

[0024] In this disclosure, the zigzag assembly 3 includes a rotating plate 4, a bent portion 5 eccentrically mounted on the rotating plate 4, a first drive portion 6 for driving the rotating plate 4 to rotate about its axis, and a second drive portion 7 for driving the rotating plate 4 to move along the height direction. Here, "eccentrically" means that the bent portion 5 is offset from the axis of the rotating plate 4, so that the bent portion 5 follows the revolution when the rotating plate 4 rotates. The bent portion 5 interacts with the copper wire 1 when it rotates with the rotating plate 4, thereby bending it. The specific structure of the bent portion 5, the first drive portion 6, and the second drive portion 7 is not limited in this disclosure, but will be described in detail in the fine lines.

[0025] By using the above technical solution, when bending the copper wire 1, it is fed to the bending assembly 3 by the wire feeding mold 2, at which time the bending part 5 is located Figure 5 The upper position in the middle, and the bending part 5 as Figure 7 As shown, located on the first side of the copper wire 1, the first drive unit 6 drives the rotating plate 4, causing the bending part 5 to rotate accordingly, thereby realizing the bending operation of the copper wire 1. When it is necessary to bend from the other side of the copper wire 1, the second drive unit 7 drives the rotating plate 4, causing the bending part 5 to move in the axial direction (height direction) to... Figure 6 The lower position shown is freed from the constraint of copper wire 1, and then, under the rotation of rotating plate 4, the bending part 5 moves to... Figure 8 The image shows the other side of the copper wire 1. At this time, the second drive unit 7 drives the rotating plate 4 to move the bending part 5 in the axial direction to reset. Figure 5In the upper position, the copper wire 1 can be bent from the other side. With this design, the copper wire 1 can be bent on both sides with only one bending part 5, without the need to reserve fixed installation space on both sides of the copper wire 1. The bending angle and span are determined only by the movement trajectory of the bending part 5, and can be flexibly adjusted through the program, overcoming the limitations of bending angle and span caused by multiple bending components.

[0026] This disclosure does not limit the second drive unit 7, for example, in Figure 4 In the illustrated embodiment, the second drive unit 7 may include a lifting member 71, a connecting rod 72, and a connecting head 73. The connecting head 73 may be fixed to the bottom of the rotating plate 4, and one end of the connecting rod 72 may be connected to the lifting member 71, while the other end may be rotatably connected to the connecting head 73. With this design, when it is necessary to drive the rotating plate 4 to move in the height direction, the lifting member 71 drives the connecting rod 72 to move the connecting head 73. Since the connecting head 73 is fixed to the rotating plate 4, the rotating plate 4 can be driven to complete the height direction movement through the connecting head 73. Figure 5 The diagram shows the bent portion 5 in its upper position. Figure 6 The diagram shows the rotating plate 4 driving the bent part 5 to its lower position. The lifting component 71 can be a cylinder, a crank-slider structure, a lead screw structure, etc. The connecting rod 72 and the connector 73 can be connected in a floating manner, that is, they have a floating gap. For example, the connector 73 has a connecting hole, the end of the connecting rod 72 extends into it and is locked, and there is a floating gap between them, which can ensure that the connecting rod 72 remains stationary when the rotating plate 4 rotates, avoiding movement jamming. In some other embodiments, the connecting rod 72 and the rotating plate 4 can also achieve relative rotation through bearings.

[0027] This disclosure does not limit the first drive unit 6, see reference. Figure 4In some embodiments of this disclosure, the first drive unit 6 may include a motor 61, a first gear 62 connected to the output shaft of the motor 61, a second gear 63 meshing with the first gear 62, a guide structure 64 eccentrically disposed on the second gear 63 for guiding along the height direction, and a guide shaft 65 with one end extending into the guide structure 64 and the other end eccentrically connected to the rotating plate 4. The second gear 63 is coaxially arranged with the rotating plate 4. When the rotating plate 4 moves along the height direction, the end of the guide shaft 65 away from the rotating plate 4 is always located within the guide structure 64. For example, more than 2 / 3 of the guide shaft 65 is always located within the guide structure 64, thereby ensuring that regardless of how the rotating plate 4 moves in the height direction, the second gear 63 can always transmit torque to the rotating plate 4 through the guide shaft 65. With this design, when the motor 61 drives the first gear 62 to rotate the second gear 63, the guide structure 64 follows the revolution. Since the guide shaft 65 extends into the guide structure 64, torque can be transmitted through the guide shaft 65, thereby driving the rotating plate 4 at the other end of the guide shaft 65 to rotate. Meanwhile, since the guide structure 64 is configured to guide along the height direction, meaning the guide shaft 65 can only move in the height direction, it can guide the lifting movement of the second drive unit 7, ensuring that the rotating plate 4 moves along the height direction. Through the cooperation of a guide shaft 65 and the guide structure 64, rotational torque can be transmitted while simultaneously guiding movement in the height direction, achieving two goals at once, simplifying the structure, and reducing costs.

[0028] Reference Figures 1-4 The broken line assembly 3 may also include a reducer 11 connected between the motor 61 and the first gear 62, with the first gear 62 mounted at the output end of the reducer 11.

[0029] This disclosure does not limit the aforementioned guide structure 64. For example, in some embodiments of this disclosure, the guide structure 64 may include a first through hole formed in the second gear 63 and a guide bearing disposed within the first through hole. The guide bearing cooperates with the guide shaft 65 to guide the movement of the rotating plate 4 in the height direction. Furthermore, in other embodiments, the guide structure 64 may simply be a guide sleeve, with the guide shaft 65 extending into the guide sleeve to provide guidance.

[0030] To make the hair clip bending mechanism compact and space-saving, refer to Figure 3 and Figure 4 In some embodiments, the lifting member 71 can be coaxially disposed on the side of the second gear 63 opposite to the rotating plate 4, i.e., all three are coaxial, reducing the occupation of the radial outer peripheral space. In this case, the second gear 63 can have a second through hole 631 for the connecting rod 72 to pass through, and the second through hole 631 is located in the middle of the second gear 63. The connecting rod 72 passes through the second gear 63 and is spaced apart from the second gear 63 to allow the second gear 63 to rotate relative to the connecting rod 72. Specifically in Figure 3 In the illustrated embodiment, the second through hole 631 can be a stepped hole, one part of which is used to accommodate the connecting rod 72 and the other part is used to accommodate the connector 73.

[0031] To achieve the rotatable installation of the second gear 63, refer to Figure 4 In some embodiments of this disclosure, the hairpin bending mechanism may further include a bearing seat 81 disposed between the lifting member 71 and the second gear 63. A supporting bearing 82 is disposed within the bearing seat 81, and the second gear 63 is mounted on the supporting bearing 82 for rotatable installation. The bearing seat 81 has a through-hole 811 in the middle, through which the connecting rod 72 can pass and through the second gear 63. The lifting member 71 may be mounted on the side of the bearing seat 81 opposite to the second gear 63. Alternatively, in some embodiments, a base 12 may be disposed between the lifting member 71 and the bearing seat 81, with the two components respectively mounted on opposite sides of the base 12.

[0032] In order to integrate the various components of the hair clip bending mechanism into a whole, refer to Figures 1-4 In some embodiments of this disclosure, the hairpin bending mechanism may further include a first mounting plate 91 and a second mounting plate 92 that are at an angle to each other, for example... Figure 4 The components are perpendicular to each other, as shown in the diagram. The motor 61 and lifting member 71 can be positioned below the first mounting plate 91, while the first gear 62 and second gear 63 can be positioned above the first mounting plate 91. The motor 61 and first gear 62 are coaxially arranged. The rotating plate 4 can be positioned above the second gear 63, and the second mounting plate 92 can be positioned above the first mounting plate 91. The wire feeding mold 2 can be mounted on the side of the second mounting plate 92 away from the first mounting plate 91, so that the supplied copper wire 1 can correspond to the positions of the rotating plate 4 and the bending portion 5. The bearing seat 81 is also positioned below the first mounting plate 91.

[0033] It should be noted that in order to connect the upper and lower components of the first mounting plate 91, connection holes need to be made at corresponding positions, such as at the position of the second gear 63, so that the second gear 63 can cooperate with the support bearing 82.

[0034] The first mounting plate 91 and the second mounting plate 92 can be assembled with bolts.

[0035] Reference Figure 1In some embodiments of this disclosure, the wire feeding mold 2 may have a wire groove 201 for feeding the copper wire 1, and the card bending mechanism may further include a support plate 10 for supporting the copper wire 1. The upper surface of the support plate 10 is flush with the bottom of the wire groove 201 to receive the copper wire 1 from the wire groove 201. The support plate 10 may be fixed to the second mounting plate 92 on one side and supported by a support column 93 erected on the first mounting plate 91 on the other side. The horizontality of the copper wire 1 can be ensured by the support plate 10 in conjunction with the wire groove 201, thereby ensuring bending accuracy by bending only in the horizontal direction through the bending part 5.

[0036] Reference Figures 1-3 The wire feeding mold 2 may include two mutually perpendicular parts, one of which can be installed in the opening 921 of the second mounting plate 92, and the other part can extend horizontally and is provided with a wire groove 201. The size design can ensure that the bottom of the wire groove 201 is flush with the support plate 10, and the shape of the support plate 10 needs to avoid the wire feeding mold 2.

[0037] In this configuration, the rotating plate 4 is located below the support plate 10. The support plate 10 may have an arc-shaped hole 101, allowing the bent portion 5 to extend from the rotating plate 4 to the upper side of the support plate 10 and rotate within the arc-shaped hole 101. By designing this arc-shaped hole 101, it can be ensured that the bent portion 5 is mounted on the rotating plate 4 and can extend to the upper side to interact with the copper wire 1, and that it does not interfere with the support plate 10 during rotation with the rotating plate 4. The structure of the arc-shaped hole 101 can be designed according to the size and movement trajectory of the bent portion 5.

[0038] This disclosure does not limit the bending portion 5, for example, in Figure 9 and Figure 10 In the illustrated embodiment, the bending portion 5 may include a bending wheel 51 and a rotating shaft 52. One end of the rotating shaft 52 may be connected to the rotating plate 4, and the bending wheel 51 may be rotatably mounted on the other end of the rotating shaft 52. That is, the bending wheel 51 needs to rotate on its own axis and also needs to revolve with the rotating plate 4 during operation. The outer contour of the projection of the bending wheel 51 along the axial direction may be formed by alternating multiple straight line segments 501 and multiple arc segments 502. That is, each straight line segment 501 has arc segments 502 on both sides, and each arc segment 502 has straight line segments 501 on both sides. The straight line segments 501 correspond to a plane, and the arc segments 502 correspond to an arc surface. With this design, when the bending wheel 51 comes into contact with the copper wire 1 and generates force, if the contact is with the arc surface corresponding to the arc segment 502, it can automatically rotate under force to contact the plane corresponding to the straight segment 501 and bend the copper wire 1. In this bending process, the bending wheel 51 and the copper wire 1 are in surface contact. Compared with the line contact between the arc surface and the copper wire 1 in related technologies, the bending effect is better, the damage to the copper wire 1 is less, and it is less likely to leave indentations caused by line contact.

[0039] This disclosure does not limit the specific structure of the bending wheel 51, for example in Figure 10 In the illustrated embodiment, it may include six straight line segments 501 and six arc segments 502. The surface roughness of the plane corresponding to the straight line segment 501 may be 0.4 μm. The radius of the arc of the arc segment 502 is 6 mm, and the distance between two opposite straight line segments 501 is 16 mm. In addition, in some other embodiments, it may also include eight straight line segments 501 and eight arc segments 502.

[0040] Reference Figure 9 In some embodiments of this disclosure, the bending portion 5 may further include a mounting base 53 fixed to the rotating plate 4, and the end of the rotating shaft 52 away from the bending wheel 51 may be connected to the mounting base 53. The mounting base 53 may be fixed to the rotating plate 4 by fasteners such as screws, and the rotating shaft 52 may be fixed to the mounting base 53 by a lock nut 15. Compared to directly fixing the rotating shaft 52 to the rotating plate 4, this design provides a more secure fixation of the rotating shaft 52 and facilitates disassembly, maintenance, and replacement.

[0041] In order to rotatably mount the bending wheel 51 to the rotating shaft 52, refer to Figure 9 In some embodiments of this disclosure, the bending portion 5 may further include a rotary bearing 54 sleeved on the rotating shaft 52, and the bending wheel 51 may be sleeved on the rotary bearing 54 to achieve relative rotation with the rotating shaft 52.

[0042] Reference Figure 9 In this embodiment, the end of the rotating shaft 52 furthest from the rotating plate 4 can be provided with a cover 13 for axially pressing the rotating bearing 54. The cover 13 can be screwed and fixed to the rotating shaft 52, that is, the rotating shaft 52 needs to have a threaded hole for engagement. The other end of the rotating bearing 54 can be fixed by a support sleeve 55 supported between the mounting base 53 and the rotating bearing 54. Since the outer diameter of the support sleeve 55 is small, a retaining ring 14 can be added to the outside of the support sleeve 55 to increase the support area of ​​the rotating bearing 54.

[0043] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0044] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0045] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A hairpin bending mechanism, characterized in that, It includes a wire feeding die for providing copper wire to be bent and a bending assembly for receiving the copper wire and bending the copper wire, the bending assembly comprising: Rotating plate; The bent portion is eccentrically mounted on the rotating plate; A first driving unit is used to drive the rotating plate to rotate about its axis; and The second drive unit is used to drive the rotating plate to move along the height direction.

2. The hair clip bending mechanism according to claim 1, characterized in that, The second drive unit includes: Lifting components; A connecting rod, one end of which is connected to the lifting member; and A connector is fixed to the bottom of the rotating plate, and the other end of the connecting rod is rotatably connected to the connector.

3. The hair clip bending mechanism according to claim 2, characterized in that, The first driving unit includes: Electric motor; The first gear is connected to the output shaft of the motor; The second gear meshes with the first gear, and the second gear is arranged coaxially with the rotating plate. A guide structure for guiding along the height direction and eccentrically disposed on the second gear; and The guide shaft has one end extending into the guide structure and the other end eccentrically connected to the rotating plate. When the rotating plate moves along the height direction, the end of the guide shaft away from the rotating plate is always located within the guide structure.

4. The hairpin bending mechanism according to claim 3, characterized in that, The guide structure includes a first through hole formed in the second gear and a guide bearing disposed within the first through hole.

5. The hair clip bending mechanism according to claim 3, characterized in that, The lifting member is coaxially disposed on the side of the second gear opposite to the rotating plate. The second gear has a second through hole through which the connecting rod passes, so as to allow the second gear to rotate relative to the connecting rod.

6. The hairpin bending mechanism according to claim 5, characterized in that, It also includes a bearing housing disposed between the lifting member and the second gear, wherein a support bearing is disposed within the bearing housing, and the second gear is mounted on the support bearing. The bearing housing has a through third hole in the middle, through which the connecting rod passes.

7. The hair clip bending mechanism according to claim 3, characterized in that, It also includes a first mounting plate and a second mounting plate that are at an angle to each other. The motor and the lifting member are disposed on the lower side of the first mounting plate. The first gear and the second gear are disposed on the upper side of the first mounting plate. The rotating plate is located on the upper side of the second gear. The second mounting plate is located on the upper side of the first mounting plate. The wire feeding mold is mounted on the side of the second mounting plate away from the first mounting plate.

8. The hair clip bending mechanism according to claim 1, characterized in that, The wire feeding mold has a wire groove for feeding the copper wire, and the hairpin bending mechanism further includes a support plate for supporting the copper wire. The upper surface of the support plate is flush with the bottom of the wire groove to receive the copper wire from the wire groove.

9. The hair clip bending mechanism according to claim 8, characterized in that, The rotating plate is located below the supporting plate, and the supporting plate has an arc-shaped hole so that the bent part can extend from the rotating plate to the upper side of the supporting plate and can rotate with the rotating plate within the arc-shaped hole.

10. The hairpin bending mechanism according to any one of claims 1-9, characterized in that, The bending portion includes: Bending wheels; and A rotating shaft is connected at one end to the rotating plate, and the bending wheel is rotatably mounted at the other end of the rotating shaft. The outer contour of the bending wheel along the axial direction is composed of multiple straight line segments and multiple arc segments alternating in sequence.

11. The hair clip bending mechanism according to claim 10, characterized in that, The bending section also includes a mounting base fixed to the rotating plate, and the end of the rotating shaft away from the bending wheel is connected to the mounting base.

12. The hair clip bending mechanism according to claim 10, characterized in that, The bending section also includes a rotary bearing sleeved on the rotating shaft, and the bending wheel is sleeved on the rotary bearing.

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