Cutter mechanism and cutting device for stator winding

Abstract

The present application belongs to the technical field of motor assembly, and specifically relates to a cutting mechanism and a cutting device for stator windings, the cutting mechanism comprising: a support frame, having a receiving slot; a stationary knife, covering the receiving slot, and provided with a cutting slot connected to the receiving slot, the cutting slot is used to insert the end of the hairpin wire into it and penetrate into the receiving slot; a gap elimination component, comprising a sliding member and a driving member, the sliding member is movably connected to the support frame, a hanging part is provided on the side of the sliding member away from the support frame, and the driving member is pivotally connected to the hanging part, so that the driving member can drive the sliding member to abut against the stationary knife and push the stationary knife to move, so as to eliminate the gap between the hairpin wire and the slot wall of the cutting slot; a moving knife, movably arranged in the receiving slot, and the moving knife can move toward the cutting slot in the direction opposite to the moving direction of the stationary knife to shear the end of the hairpin wire. The present application can reduce the possibility of deformation of the end of the hairpin wire during the shearing process, and improve the product qualification rate of the subsequent process.

Description

Technical Field

[0001] The present application relates to the technical field of motor assembly, and more specifically, to a cutting tool mechanism and a flattening device for a stator winding. Background Art

[0002] As a driving motor for future new energy vehicles, the stator winding of a flat wire motor is wound with a wire having a rectangular cross-sectional shape. Compared with a round wire motor with a traditional round wire cross-sectional shape, more wires can be inserted into the stator slot of the same area, thereby improving the power density. Thus, in the case of the same volume, more stator windings can be inserted into the flat wire motor. In this way, the flat wire motor can output higher power and torque under the same loss, and is particularly suitable for the application requirements of vehicle driving motors in terms of miniaturization and light weight.

[0003] In the stator winding of a flat wire motor, a common wire form is a hairpin wire. The manufacturing process of the stator winding mainly includes inserting insulating paper, inserting hairpin wires, twisting the ends of the hairpin wires, cutting the ends, welding the ends, etc. Among them, after the hairpin wires are inserted into the stator core and the end forming by twisting is completed, the redundant or uneven parts at the ends of the hairpin wires need to be uniformly cut and flattened to facilitate welding. In the related art, due to reasons such as the gap between the hairpin wire and the cutting groove on the periphery, the hairpin wire will undergo large deformation after the end is sheared, affecting the product qualification rate of the subsequent welding process. Summary of the Invention

[0004] The purpose of the present application is to provide a cutting tool mechanism and a flattening device for a stator winding, which can reduce the possibility of deformation of the ends of the hairpin wires in the stator winding during the shearing process and improve the product qualification rate of the subsequent welding process.

[0005] In a first aspect, an embodiment of the present application provides a cutting tool mechanism, including: a support frame having a receiving groove; a stationary tool covering the receiving groove, the stationary tool is provided with a cutting groove communicating with the receiving groove, and the cutting groove is used for the end of the target object to be inserted therein and penetrate into the receiving groove; a clearance eliminating component including a sliding member and a driving member, the sliding member is movably connected to the support frame, a hanging portion is provided on a side of the sliding member facing away from the support frame, and the driving member is pivotally connected to the hanging portion, so that the driving member can drive the sliding member to abut against the stationary tool and push the stationary tool to move, so as to eliminate the gap between the target object and the groove wall of the cutting groove; and a moving tool movably disposed in the receiving groove, and the moving tool can move toward the cutting groove in a direction opposite to the moving direction of the stationary tool to shear the end of the target object.

[0006] The cutting mechanism provided by the embodiment of the present application includes a support frame with a receiving slot, a stationary knife covering the receiving slot, a moving knife movably arranged in the receiving slot, and a gap elimination component movably connected to the support frame, the gap elimination component includes a sliding member and a driving member, the sliding member is movably connected to the support frame, a hanging part is arranged on the side of the sliding member away from the support frame, and the driving member is pivotally connected to the hanging part, so that the driving member can drive the sliding member to abut against the stationary knife and push the stationary knife to move, so as to eliminate the gap between the target object such as the hairpin wire and the slot wall of the cutting slot of the stationary knife, thereby reducing the possibility of deformation of the end of the hairpin wire in the stator winding during the shearing process of the passive knife, and improving the product qualification rate of the subsequent welding process.

[0007] In addition, the cutter mechanism according to the present application may also have the following additional technical features:

[0008] In some embodiments of the present application, the driving member is arranged at a preset angle with the hanging portion in the initial position, and when the driving member rotates relative to the hanging portion, the distance between the end of the driving member away from the hanging portion and the support frame remains unchanged.

[0009] In some embodiments of the present application, the backlash elimination assembly further includes a compressible reset member, which is disposed between a side of the stationary knife away from the sliding member and the support frame.

[0010] In some embodiments of the present application, the cutting mechanism further includes a pressing plate, which is arranged on the support frame, and is provided with a guide groove for accommodating a static knife. One end of the pressing plate is also provided with a slide groove connected to the guide groove. A driving part connected to the hanging part is provided on the side of the sliding member facing the support frame, and the driving part is embedded in the slide groove and abuts against the static knife.

[0011] In some embodiments of the present application, the cutting mechanism further includes a propulsion assembly, which is movably connected to the support frame, and one end of the propulsion assembly can extend into the receiving groove and is fixedly connected to the movable knife to drive the movable knife to move.

[0012] In some embodiments of the present application, the moving knife is located on the side of the propulsion assembly facing the static knife, and an elastic member is provided between the propulsion assembly and the moving knife, and the elastic member is used to push the moving knife to fit the static knife.

[0013] In some embodiments of the present application, the propulsion assembly includes a first propulsion member and a second propulsion member arranged in a stacked manner, the movable knife is located on the side of the second propulsion member away from the first propulsion member, the first propulsion member is fixedly connected to the second propulsion member by a fastener, the second propulsion member is movably connected to the movable knife by a positioning pin, and a groove for accommodating an elastic member is provided on the side of the second propulsion member facing the movable knife.

[0014] In some embodiments of the present application, there are multiple cutting grooves, and the multiple cutting grooves are arranged on the stationary knife side by side and at intervals along the moving direction of the movable knife.

[0015] Second aspect, embodiments of the present application provide a trimming device for a stator winding. The stator winding includes multiple groups of hairpin conductors arranged at intervals along its circumferential direction. The trimming device includes: a base; and a cutting tool mechanism of each embodiment of the present application, which is arranged on the base. The moving blade of the cutting tool mechanism can move along the radial direction of the stator winding to cut the ends of at least one group of hairpin conductors.

[0016] In some embodiments of the present application, the trimming device further includes a rotating disk, which is rotatably connected to the base and surrounds the outer peripheral side of the cutting tool mechanism. The rotating disk is provided with a cam groove extending along its circumferential direction, and the distance between the cam groove and the rotation center of the rotating disk changes gradually along the circumferential direction. The cutting tool mechanism includes a propulsion assembly. One end of the propulsion assembly away from the moving blade is provided with a cam that can be accommodated in the cam groove. When the rotating disk rotates, it can push the moving blade towards the rotation center through the propulsion assembly to cut the ends of at least one group of hairpin conductors.

[0017] In some embodiments of the present application, the trimming device further includes a first driving device, which is connected to the base, and the output end of the first driving device is used to drive the rotating disk to rotate relative to the base.

[0018] In some embodiments of the present application, the number of cutting tool mechanisms is multiple, and the multiple cutting tool mechanisms are arranged at intervals along the circumferential direction on the cutting tool disk; the rotating disk is provided with multiple cam grooves, and the multiple cam grooves are arranged in one-to-one correspondence with the multiple cutting tool mechanisms.

[0019] In some embodiments of the present application, the trimming device further includes a turntable, a cutting tool disk and a second driving device. The turntable is rotatably connected to the base, the rotating disk and the cutting tool disk are coaxially arranged and fixedly connected to the turntable. The cutting tool mechanism is located on the side of the cutting tool disk away from the turntable. The second driving device is connected to the base, and the output end of the second driving device is connected to the turntable to drive the cutting tool disk and the rotating disk to rotate together through the turntable.

[0020] In some embodiments of the present application, the trimming device further includes a third driving device. The third driving device includes a telescopic connecting rod, and the connecting rod is arranged at the rotation center of the rotating disk. The cutting tool mechanism includes a backlash elimination assembly. The backlash elimination assembly includes a driving member. The output end of the connecting rod is connected to the driving members of the multiple cutting tool mechanisms to push the multiple driving members to rotate together to push the stationary blades of the multiple cutting tool mechanisms to move in a direction away from the rotation center.

[0021] In some embodiments of the present application, a hollow channel is formed around the connecting rod by the cutting tool disk, the turntable and the base. The receiving groove of the support frame of the cutting tool mechanism is communicated with the hollow channel, and the hollow channel is used to discharge the ends of the cut hairpin conductors.

[0022] The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specific embodiments of the present application are given. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting the present application. And throughout the drawings, the same reference numerals are used to denote the same components. Among them:

[0024] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting the present application. And throughout the drawings, the same reference numerals are used to denote the same components. Among them:

[0025] Figure 1 is a schematic perspective view of the cutting tool mechanism of the embodiment of the present application;

[0026] Figure 2 is Figure 1 a sectional view of the cutting tool mechanism shown along the direction A-A;

[0027] Figure 3 is Figure 2 a schematic view of the structure along the direction B;

[0028] Figure 4 shows a schematic view of the structure of the stator winding of the embodiment of the present application;

[0029] Figure 5 shows Figure 4 a schematic view of the structure of the bottom surface of the stator winding shown;

[0030] Figure 6 is a schematic view of the structure of the flattening device of the embodiment of the present application;

[0031] Figure 7 is Figure 6 a top view of the flattening device shown;

[0032] Figure 8 is Figure 6 a partial sectional view of the flattening device shown.

[0033] The reference numerals in the drawings are as follows:

[0034] 1000, Flattening device; 210, Stator winding; 211, Hairpin wire; 211a, U-shaped wire; 211b, I-shaped wire; 212, Stator core; 213, Stator slot;

[0035] 100, Cutting tool mechanism; 200, Base; 300, Turntable; 400, Rotating disk; 401, Cam groove; 401a, First end; 401b, Second end; 500, First driving device; 600, Cutting tool disk; 700, Second driving device; 800, Third driving device; 801, Connecting rod; 802, Guide; 803, Cylinder; 900, Hollow channel;

[0036] 1, Support frame; 10, Target object; 11, Receiving groove;

[0037] 2, Stationary knife; 21, Cutting groove;

[0038] 3, Backlash elimination component; 31, Sliding part; 311, Hanging part; 312, Driving part; 32, Driving piece; 321, Connecting rod part; 322, Rotating part; 3221, Contact head; 3222, Rotating shaft; 33, Reset part;

[0039] 4, Moving knife; 42, Outlet end;

[0040] 5, Propelling component; 51, First propelling piece; 52, Second propelling piece; 521, Groove; 53, Fastener; 54, Positioning pin; 55, Cam;

[0041] 6, Elastic part; 7, Pressing plate; 71, Guide groove; 72, Sliding groove. Detailed implementation mode

[0042] Hereinafter, the exemplary embodiments of the present application will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application can be more thoroughly understood and the scope of the present application can be completely conveyed to those skilled in the art.

[0043] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprises", "comprising", "includes", and "including" are inclusive and thus specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. Method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an execution order is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0044] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, a first element, component, region, layer, or section discussed below may be referred to as a second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0045] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures, such as "inner", "outer", "inside", "outside", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.

[0046] Reference to "embodiment" in this document means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0047] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0048] Figure 1 It is a schematic three-dimensional structure diagram of the cutter mechanism of the embodiment of the present application. Figure 2 is Figure 1 The sectional view of the cutter mechanism shown along the direction A-A. Figure 3 is Figure 2 The schematic structure diagram along the direction B.

[0049] Referring to Figures 1 to 3 , the embodiment of the present application provides a cutter mechanism 100, including a support frame 1, a stationary cutter 2, a backlash elimination component 3, and a moving cutter 4.

[0050] The support frame 1 has a receiving groove 11, the stationary cutter 2 covers the receiving groove 11, and a cutting groove 21 communicating with the receiving groove 11 is provided on the stationary cutter 2. The cutting groove 21 is used for the end of the target object 10 to be inserted therein and penetrate into the receiving groove 11. The backlash elimination component 3 includes a sliding member 31 and a driving member 32. The sliding member 31 is movably connected to the support frame 1. A hanging portion 311 is provided on the side of the sliding member 31 facing away from the support frame 1. The driving member 32 is pivotally connected to the hanging portion 311, so that the driving member 32 can drive the sliding member 31 to abut against the stationary cutter 2 and push the stationary cutter 2 to move, so as to eliminate the gap between the target object 10 and the groove wall of the cutting groove 21. The moving cutter 4 is movably arranged in the receiving groove 11, and the moving cutter 4 can move toward the cutting groove 21 in a direction opposite to the moving direction of the stationary cutter 2 to shear the end of the target object 10.

[0051] In this embodiment, the target object 10 can be a hairpin wire in the stator winding of a flat wire motor, or can also be other pin components. Taking the hairpin wire as an example, after the hairpin wire is inserted into the stator core and the end is formed by turning, the excess or uneven parts at the end of the straight part need to be cut flat uniformly to facilitate subsequent welding. In the related art, after the hairpin wire is inserted into the cutting groove of the tool, due to the gap between the hairpin wire and the groove wall of the cutting groove, the hairpin wire will be greatly deformed after the end is sheared, affecting the product qualification rate of the subsequent welding process.

[0052] Therefore, in the embodiment of the present application, in addition to including the support frame 1, the stationary knife 2 and the moving knife 4, the cutting knife mechanism 100 is further provided with a clearance eliminating component 3, and the clearance eliminating component 3 is used to eliminate the gap between the target object 10 such as the hairpin wire and the groove wall of the cutting groove 21, reducing the possibility of deformation of the end of the hairpin wire during shearing.

[0053] Specifically, the support frame 1 has a receiving groove 11, the stationary knife 2 covers the receiving groove 11, and a cutting groove 21 communicating with the receiving groove 11 is provided on the stationary knife 2. The cutting groove 21 is used for the end of the hairpin wire to be inserted therein and penetrate into the receiving groove 11. The clearance eliminating component 3 is arranged at one end of the support frame 1. The clearance eliminating component 3 includes a sliding member 31 and a driving member 32. A hanging portion 311 is arranged on the side of the sliding member 31 facing away from the support frame 1. The driving member 32 includes a connecting rod portion 321 and a rotating portion 322 connected in sequence. The rotating portion 322 includes an abutting head 3221 and a rotating shaft 3222 arranged on the abutting head 3221. The driving member 32 is pivotally connected to the hanging portion 311 through the rotating shaft 3222, so that the driving member 32 can pivot relative to the hanging portion 311, thereby driving the sliding member 31 to abut against the stationary knife 2 and push the stationary knife 2 to move, so that one side groove wall of the cutting groove 21 of the stationary knife 2 fits the end of the hairpin wire, eliminating the gap between the hairpin wire and the groove wall of the cutting groove 21. Then the moving knife 4 is movably arranged in the receiving groove 11, and the moving knife 4 can move toward the cutting groove 21 in a direction opposite to the moving direction of the stationary knife 2, so as to ensure that the hairpin wire does not shake in the cutting groove 21 during the process of shearing the end of the hairpin wire, thereby reducing the possibility of deformation of the end of the hairpin wire during shearing.

[0054] In addition, the cutting groove 21 communicates with the receiving groove 11. The cutting groove 21 can accommodate the ends of hairpin wires with different cross-sectional areas, and the receiving groove 11 can accommodate the ends of hairpin wires with different length dimensions. Thus, the cutting knife mechanism 100 can shear the ends of various different sizes of hairpin wires, expanding the applicable range of the cutting knife mechanism 100.

[0055] According to the cutter mechanism 100 provided by the embodiments of the present application, it includes a support frame 1 having a receiving groove 11, a stationary cutter 2 covering the receiving groove 11, a moving cutter 4 movably disposed in the receiving groove 11, and a backlash eliminating component 3 movably connected to the support frame 1. One end of the backlash eliminating component 3 can abut against the stationary cutter 2 and push the stationary cutter 2 to move, so as to eliminate the gap between a target object 10 such as a hairpin wire and the wall of the cutting groove 21 of the stationary cutter 2, thereby reducing the possibility that the end of the hairpin wire in the stator winding is deformed during the shearing process by the moving cutter 4 and improving the product qualification rate of the subsequent welding process.

[0056] In some embodiments, when the driving member 32 is in the initial position, it is arranged at a preset angle with respect to the hanging portion 311. When the driving member 32 rotates relative to the hanging portion 311, the distance between the end of the driving member 32 away from the hanging portion 311 and the support frame 1 remains unchanged.

[0057] As Figure 3 shown, when the driving member 32 is in the initial position, it is arranged at a preset angle θ with respect to the hanging portion 311. The preset angle θ can be, for example, 120° - 150°. The driving member 32 rotates relative to the hanging portion 311 under the action of an external force. The external force acts on the end of the driving member 32 away from the hanging portion 311. The external force can be provided by an operator's manual operation or by other driving devices. Since the distance between the end of the driving member 32 away from the hanging portion 311 and the support frame 1 remains unchanged, when the driving member 32 rotates relative to the hanging portion 311, the sliding member 31 will be driven to push the stationary cutter 2 to move. Assuming the length of the driving member 32 is L and the rotation angle of the driving member 32 from the initial position is α, the moving distance d of the stationary cutter 2 is not greater than the gap between the hairpin wire and the wall of the cutting groove 21, and the distance d satisfies the following condition:

[0058] d ≤ L×(1 - cosα), where α = 180° - θ.

[0059] Thus, the magnitude of the preset angle θ can be calculated and can be selected according to specific application scenarios, which will not be elaborated here.

[0060] In some embodiments, the backlash eliminating component 3 further includes a compressible reset member 33. The reset member 33 is disposed between the side of the stationary cutter 2 away from the sliding member 31 and the support frame 1.

[0061] Optionally, the reset member 33 is a spring. The reset member 33 is assembled between one side of the stationary knife 2 away from the sliding member 31 and the support frame 1 with a certain pre-tightening force. When the hairpin wire is inserted into the cutting groove 21 of the stationary knife 2, one end of the clearance elimination assembly 3 pushes the stationary knife 2 to move a certain distance to eliminate the clearance between the hairpin wire and the groove wall of the cutting groove 21. At this time, the stationary knife 2 compresses the reset member 33, and then the moving knife 4 moves toward the cutting groove 21 in the direction opposite to the moving direction of the stationary knife 2 to shear the end of the hairpin wire. After the shearing is completed, the external force of the driving member 32 disappears, the moving knife 4 returns to its original position, the reset member 33 extends and returns to its initial assembled state, and pushes the stationary knife 2 back to its original position.

[0062] In some embodiments, the cutter mechanism 100 further includes a pressing plate 7. The pressing plate 7 is disposed on the support frame 1. A guiding groove 71 for accommodating the stationary knife 2 is provided on the pressing plate 7. A sliding groove 72 communicating with the guiding groove 71 is further provided at one end of the pressing plate 7. A driving portion 312 connected to the hanging portion 311 is provided on the side of the sliding member 31 facing the support frame 1. The driving portion 312 is embedded in the sliding groove 72 and abuts against the stationary knife 2.

[0063] As Figures 1 to 3 shown, the pressing plate 7 is fixed to the support frame 1 by a plurality of fasteners. In order to facilitate the placement of the hairpin wire of the stator winding, the pressing plate 7 is provided with hollowed-out portions at both sides corresponding to the cutting groove 21 of the stationary knife 2 to avoid structural interference between the pressing plate 7 and the stator winding and damage to the stator winding.

[0064] A guiding groove 71 for accommodating the stationary knife 2 is provided on the pressing plate 7. The guiding groove 71 is a through groove penetrating the pressing plate 7. The guiding groove 71 is used to guide the stationary knife 2 to move in a preset direction to prevent the end of the hairpin wire from being deformed due to the deviation of the stationary knife 2. A sliding groove 72 communicating with the guiding groove 71 is further provided at one end of the pressing plate 7. The sliding groove 72 is formed by inwardly recessing a certain thickness from the surface of the pressing plate 7 facing the support frame 1, so that the pressing plate 7 can limit the upward movement of the driving portion 312 of the sliding member 31. The driving portion 312 is embedded in the sliding groove 72 and abuts against the stationary knife 2, so that the sliding member 31 can be driven to push the stationary knife 2 to move under the external force of the driving member 32.

[0065] In some embodiments, the cutter mechanism 100 further includes a propulsion assembly 5. The propulsion assembly 5 is movably connected to the support frame 1. One end of the propulsion assembly 5 can extend into the receiving groove 11 and is fixedly connected to the moving knife 4 to drive the moving knife 4 to move.

[0066] As Figure 2 and Figure 3As shown, the movable knife 4 is arranged in the receiving groove 11 of the support frame 1, one end of the propulsion assembly 5 can extend into the receiving groove 11 and be fixedly connected to the movable knife 4, and the movable knife 4 can be arranged at the top or upper part of one end of the propulsion assembly 5. Under the action of external force, the propulsion assembly 5 can push the movable knife 4 to move in the direction opposite to the moving direction of the static knife 2 to perform a shearing action. The external force can be provided by manual operation of the operator or by other driving devices. The structure of the propulsion assembly 5 has various forms, as long as one end of the propulsion assembly 5 can extend into the receiving groove 11 of the support frame 1 and be fixedly connected to the movable knife 4.

[0067] In some embodiments, the movable knife 4 is located on the side of the propulsion assembly 5 facing the stationary knife 2, and an elastic member 6 is provided between the propulsion assembly 5 and the movable knife 4, and the elastic member 6 pushes the movable knife 4 to fit the stationary knife 2.

[0068] Optionally, the number of elastic members 6 can be at least two, and at least two elastic members 6 are spaced between the propulsion assembly 5 and the movable blade 4. As mentioned above, the movable blade 4 can shear the end of the hairpin wire extending into the cutting groove 21 to the receiving groove 11. In order to prevent the end of the hairpin wire from deforming too much during the shearing process, the movable blade 4 and the stationary blade 2 need to be arranged in contact with each other so that the movable blade 4 can cut the root from the contact surface of the two. The elastic member 6 can push the movable blade 4 to be arranged in contact with the stationary blade 2 to eliminate the gap between the contact surfaces of the movable blade 4 and the stationary blade 2.

[0069] In some embodiments, the propulsion assembly 5 includes a first propulsion member 51 and a second propulsion member 52 arranged in a stacked manner, the movable knife 4 is located on the side of the second propulsion member 52 away from the first propulsion member 51, the first propulsion member 51 is fixedly connected to the second propulsion member 52 through a fastener 53, the second propulsion member 52 is movably connected to the movable knife 4 through a positioning pin 54, and a groove 521 for accommodating the elastic member 6 is provided on the side of the second propulsion member 52 facing the movable knife 4.

[0070] If Figure 2 and Figure 3As shown, the first pusher 51 and the second pusher 52 are stacked in the receiving groove 11 of the support frame 1. The moving knife 4 is arranged on the side of the second pusher 52 away from the first pusher 51. A groove 521 for accommodating the elastic member 6 is arranged on the side of the second pusher 52 facing the moving knife 4. The number of the grooves 521 is the same as the number of the elastic members 6. Among them, the moving knife 4 can move relative to the pushing assembly 5 in the vertical direction under the action of the elastic member 6, so that the moving knife 4 is attached to the stationary knife 2. Specifically, the first pusher 51 is fixedly connected to the second pusher 52 through a fastener 53. The fastener 53 is a bolt. The second pusher 52 is movably connected to the moving knife 4 through a positioning pin 54. The positioning pin 54 is a T-shaped pin. The second pusher 52 is provided with a T-shaped groove. The T-shaped groove includes a large hole and a small hole arranged along the axial direction. The cap of the T-shaped pin is arranged in the large hole of the T-shaped groove. The rod of the T-shaped pin is arranged in the small hole of the T-shaped groove and extends into the moving knife 4. Among them, the thickness of the cap is less than the depth of the large hole of the T-shaped groove, so that the positioning pin 54 can move axially, and thus can push the moving knife 4 to be attached to the stationary knife 2 under the action of the elastic member 6 to eliminate the gap between the fitting surfaces of the moving knife 4 and the stationary knife 2.

[0071] In some embodiments, the number of the cutting grooves 21 is multiple, and the multiple cutting grooves 21 are arranged side by side and at intervals on the stationary knife 2 along the moving direction of the moving knife 4.

[0072] As Figure 2 shown, optionally, each hairpin wire 211 has two ends, and a total of eight ends need to be sheared. In one example, the number of the cutting grooves 21 is four, and the four cutting grooves 21 are arranged side by side and at intervals on the stationary knife 2 along the moving direction of the moving knife 4. When the moving knife 4 moves, the ends of the four hairpin wires can be sheared off one by one, effectively ensuring the flatness of the ends of the hairpin wires after shearing and improving the shearing efficiency. The number of the cutting grooves 21 can also be one, two, three or more, and the number of the ends to be sheared decreases or increases accordingly, depending on the structure of the stator winding.

[0073] Figure 4 The structural schematic diagram of the stator winding showing the embodiment of the present application Figure 5 showing Figure 4 The structural schematic diagram of the bottom surface of the stator winding shown.

[0074] Refer to Figure 4 and Figure 5, the stator winding 210 includes a stator core 212 and at least two turns of windings disposed on the stator core 212. Each turn of winding includes a plurality of hairpin wires 211 spaced circumferentially. The plurality of hairpin wires 211 of at least two turns of windings are aligned radially, such that the plurality of hairpin wires 211 are arranged in a group at radial intervals, and multiple groups of hairpin wires 211 are spaced circumferentially. The hairpin wire 211 may include a U-shaped wire 211a, which includes a bent portion and two straight portions. Among them, the bent portion is formed into a preset shape by a stamping mechanism, and the two straight portions are parallel to each other and connected to both ends of the bent portion, forming a "U" shaped structure. The hairpin wire 211 further includes an I-shaped wire 211b, which includes a straight portion. A straight portion of a U-shaped wire 211a and a straight portion of an I-shaped wire 211b may be commonly inserted into a corresponding stator slot 213 of the stator core 212, or one straight portion of each of two adjacent U-shaped wires 211a in the radial direction may be commonly inserted into a corresponding stator slot 213, so as to braid multiple groups of hairpin wires 211 into the stator winding 210. In one example, as Figure 5 shown, a group of hairpin wires 211 includes four hairpin wires 211 distributed at radial intervals. The ends of the two straight portions of each hairpin wire 211 need to be sheared, for a total of eight ends.

[0075] The manufacturing process of the stator winding 210 mainly includes inserting insulating paper, inserting hairpin wires, twisting the ends of the hairpin wires, cutting the ends, welding the ends, etc. Among them, after the hairpin wire 211 is inserted into the stator core 212 and the end twisting is completed, the redundant or uneven portions at the ends of the hairpin wire 211 need to be uniformly cut flat by a cutter mechanism 100 to facilitate welding.

[0076] Figure 6 is a schematic structural diagram of a flattening device for a stator winding according to an embodiment of the present application.

[0077] Referring to Figure 6 , an embodiment of the present application further provides a flattening device 1000 for a stator winding. The stator winding 210 includes multiple groups of hairpin wires 211 spaced circumferentially along its own circumference. The flattening device 1000 includes: a base 200 and the cutter mechanism 100 of each embodiment of the present application. The cutter mechanism 100 is disposed on the base 200, and the moving blade 4 of the cutter mechanism 100 can move along the radial direction of the stator winding 210 to shear the ends of at least one group of hairpin wires 211.

[0078] In one example, the stator winding 210 is rotatably connected to a rotating member. The rotating member can be used to drive the stator winding 210 to rotate circumferentially around itself. A cutting tool mechanism 100 is fixed to the base 200 along the radial direction of the stator winding 210. The moving blade 4 of the cutting tool mechanism 100 can cut the ends of a set of hairpin wires 211 at one time. When the rotating member drives the stator winding 210 to rotate by a first angle, the ends of another set of hairpin wires 211 can be aligned with the cutting tool mechanism 100, so as to cut the ends of another set of hairpin wires 211. By gradually rotating a certain angle, the ends of multiple sets of hairpin wires 211 can be cut successively. Among them, multiple hairpin wires 211 in a set of hairpin wires 211 are distributed at intervals along the radial direction of the stator winding 210. The rotating member can be rotatably connected to the base 200, or can be a rotating member of other equipment located above the trimming device 1000.

[0079] In another example, as Figure 6 shown, the number of the cutting tool mechanisms 100 is multiple. The multiple cutting tool mechanisms 100 are arranged at intervals along the circumferential direction on the base 200. The moving blade 4 of each cutting tool mechanism 100 can move along the radial direction of the stator winding 210. Among them, the number of sets of the hairpin wires 211 is an integer multiple of the number of the cutting tool mechanisms 100. The multiple cutting tool mechanisms 100 are rotatable relative to the base 200, and the stator winding 210 does not need to rotate. The multiple cutting tool mechanisms 100 can cut the ends of multiple sets of hairpin wires 211 at one time; then the multiple cutting tool mechanisms 100 rotate by a certain angle relative to the base 200, and the multiple cutting tool mechanisms 100 can cut the ends of another multiple sets of hairpin wires 211 at one time until all the ends of the hairpin wires 211 are cut, improving the cutting efficiency.

[0080] Figure 7 For Figure 6 the schematic top view structure diagram of the trimming device shown.

[0081] In some embodiments, the trimming device 1000 further includes a rotating disk 400. The rotating disk 400 is rotatably connected to the base 200, and the rotating disk 400 surrounds the outer peripheral side of the cutting tool mechanism 100. A cam groove 401 extending along the circumferential direction of itself is provided on the rotating disk 400. The distance between the cam groove 401 and the rotation center of the rotating disk 400 changes gradually; the cutting tool mechanism 100 includes a propulsion assembly 5. A cam 55 that can be received in the cam groove 401 is provided at one end of the propulsion assembly 5 away from the moving blade 4. When the rotating disk 400 rotates, it can push the moving blade 4 to move towards the rotation center through the propulsion assembly 5 to cut the ends of at least one set of hairpin wires 211.

[0082] Refer to again Figure 6 and Figure 7, the center of the rotating disk 400 is hollowed out and is disposed around the outer peripheral side of the cutting tool mechanism 100, and the rotating disk 400 is rotatably connected to the base 200. A cam groove 401 extending along the circumferential direction of the rotating disk 400 is provided on the rotating disk 400. A cam 55 that can be received in the cam groove 401 is provided at one end of the propulsion assembly 5 of the cutting tool mechanism 100 away from the moving blade 4. The cam 55 can be rotatably connected to one end of the propulsion assembly 5 away from the moving blade 4 to improve the rotational flexibility of the cam 55. In this way, when the cutting tool mechanism 100 remains stationary and the rotating disk 400 rotates relative to the cutting tool mechanism 100, the cam 55 can rotate circumferentially around itself while moving along the cam groove 401, reducing the frictional force between the cam 55 and the groove wall of the cam groove 401.

[0083] As Figure 7 shown, the cam groove 401 is an arc groove. The distance between the first end 401a and the rotation center of the rotating disk 400 is relatively far, while the distance between the remaining positions and the rotation center of the rotating disk 400 gradually becomes closer along the arc length direction of the cam groove 401, so that the distance between the second end 401b and the rotation center of the rotating disk 400 is the closest. The distance difference between the first end 401a and the second end 401b of the cam groove 401 and the rotation center of the rotating disk 400 is the distance for the propulsion assembly 5 to drive the moving blade 4 to move radially along the rotating disk 400.

[0084] When the rotating disk 400 rotates clockwise relative to the cutting tool mechanism 100, the cam 55 gradually rotates from the first end 401a to the second end 401b in the cam groove 401. The combination of the cam 55 and the cam groove 401 can provide a thrust force for the propulsion assembly 5, thereby pushing the propulsion assembly 5 to drive the moving blade 4 to move radially toward the rotation center along the rotating disk 400, and then successively cutting the ends of a corresponding group of hairpin wires 211. When the rotating disk 400 rotates counterclockwise relative to the cutting tool mechanism 100, the cam 55 gradually rotates from the second end 401b to the first end 401a in the cam groove 401. The combination of the cam 55 and the cam groove 401 can provide a pulling force for the propulsion assembly 5, thereby pulling the propulsion assembly 5 to drive the moving blade 4 to move radially away from the rotation center to complete the retraction of the blade.

[0085] In some embodiments, the trimming device 1000 further includes a first driving device 500. The first driving device 500 is connected to the base 200, and the output end of the first driving device 500 is used to drive the rotating disk 400 to rotate relative to the base 200.

[0086] As Figure 6 and Figure 7As shown, the first driving device 500 may include a first motor and a first transmission mechanism. The first transmission mechanism may be any one of a gear transmission assembly, a belt transmission assembly, and a chain transmission assembly. Taking the gear transmission assembly as an example, the first transmission mechanism includes a driving gear and a driven gear that mesh with each other. The rotating disk 400 is provided with a plurality of teeth at intervals along its outer circumference as the driven gear. The first motor may be a servo motor or a stepper motor. The output end of the first motor is connected to the driving gear to drive the rotating disk 400 to rotate, thereby driving the moving cutter 4 to cut the end of the hairpin lead 211. The first driving device 500 may further include an outer cover that covers the driving gear and some of the teeth of the rotating disk 400 to prevent foreign impurities from entering the tooth engagement area and damaging the gear set.

[0087] It can be understood that when the first transmission mechanism is a belt transmission assembly or a chain transmission assembly, the rotating disk 400 can be used as a driven pulley or a driven sprocket, and the rotating disk 400 is driven to rotate by a conveyor belt or a conveyor chain, which will not be elaborated here.

[0088] In some embodiments, the number of the cutter mechanisms 100 is multiple, and the multiple cutter mechanisms 100 are arranged at intervals along the circumferential direction on the cutter disk 600; a plurality of cam grooves 401 are provided on the rotating disk 400, and the plurality of cam grooves 401 are arranged in one-to-one correspondence with the plurality of cutter mechanisms 100.

[0089] As Figure 7 shown, the number of the cutter mechanisms 100 is six, and the six cutter mechanisms 100 are arranged at intervals along the circumferential direction on the cutter disk 600. Six corresponding cam grooves 401 are provided on the rotating disk 400. Then, the six cutter mechanisms 100 can cut the ends of 6 groups of hairpin leads 211 simultaneously, improving the cutting efficiency. Suppose the stator winding 210 has more groups of hairpin leads 211 arranged at intervals along its circumferential direction, such as 12 groups, 18 groups, etc. Then, the six cutter mechanisms 100 can rotate a second angle simultaneously to continue cutting the ends of the next 6 groups of hairpin leads 211. For this purpose, the cutter mechanism 100 and the rotating disk 400 need to be able to rotate simultaneously to achieve this.

[0090] Figure 8 For Figure 6 the partial sectional view of the trimming device shown.

[0091] In some embodiments, the trimming device 1000 further includes a turntable 300, a cutter disk 600, and a second driving device 700. The turntable 300 is rotatably connected to the base 200. The rotating disk 400 and the cutter disk 600 are coaxially arranged and fixedly connected to the turntable 300. The cutter mechanism 100 is located on the side of the cutter disk 600 away from the turntable 300. The second driving device 700 is connected to the base 200, and the output end of the second driving device 700 is connected to the turntable 300 to drive the cutter disk 600 and the rotating disk 400 to rotate together through the turntable 300.

[0092] As shown Figure 8 in the figure, the turntable 300 is rotatably connected to the base 200 through a bearing. The rotating disk 400 and the cutter disk 600 are both coaxially arranged and fixedly connected to the turntable 300. The cutter mechanism 100 is fixed on the cutter disk 600. The rotating disk 400 surrounds the outer peripheral side of the cutter mechanism 100. When the second driving device 700 drives the turntable 300 to rotate, it can drive the rotating disk 400 and the cutter disk 600 to rotate together. The second driving device 700 may include, for example but not limited to, a servo motor or a stepper motor, etc. In some embodiments, the second driving device 700 may further include a reduction device, and the reduction device is connected to the output end of the servo motor or the stepper motor. The reduction device may be a gear set, a belt drive assembly or a chain drive assembly, etc.

[0093] Assume that the stator winding 210 has more groups of hairpin conductors 211 arranged at intervals along its circumferential direction, and the number of groups of the hairpin conductors 211 is an integer multiple of the number of the cutter mechanisms 100. For example, the stator winding 210 has 12 groups of hairpin conductors 211, and each group of hairpin conductors 211 has 4 hairpin conductors 211 arranged at intervals along the radial direction, with a total of 48 hairpin conductors 211. Then, the stator core 212 is correspondingly provided with 48 stator slots. The trimming device 1000 includes 6 cutter mechanisms 100 arranged at intervals along the circumferential direction. When the first driving device 500 is started alone, the rotating disk 400 can rotate relative to the cutter disk 600 by a first angle, so that the 6 cutter mechanisms 100 can simultaneously shear the ends of 6 groups of hairpin conductors 211. Then, the second driving device 700 is started, and by driving the turntable 300 to rotate through the second driving device 700, it can drive the rotating disk 400 and the cutter disk 600 to rotate together by a second angle. The second angle is, for example, 7.5°, which is specifically determined according to the size and arrangement density of the cam groove 401, so as to continue shearing the ends of another 6 groups of hairpin conductors 211, and finally shear all the ends completely to facilitate the subsequent welding process.

[0094] In some embodiments, the trimming device 1000 further includes a third driving device 800. The third driving device 800 includes a telescopic connecting rod, and the connecting rod is arranged at the rotation center of the rotating disk 400. The cutter mechanism 100 includes a backlash elimination assembly 3. The backlash elimination assembly 3 includes a driving member 32. The output end of the connecting rod is connected to the driving members 32 of the plurality of cutter mechanisms 100, and is used to push the plurality of driving members 32 to rotate together, so that the stationary knives 2 of the plurality of cutter mechanisms 100 move in a direction away from the rotation center.

[0095] Refer to Figure 8, as described above, before the moving blade 4 of the cutting tool mechanism 100 performs the cutting operation, it is necessary to eliminate the gap between the hairpin wire 211 and the groove wall of the cutting groove 21 of the stationary blade 2 through the backlash elimination component 3. When the flattening device 1000 includes a plurality of cutting tool mechanisms 100, the third driving device 800 can simultaneously eliminate the gaps between multiple groups of hairpin wires 211 and the groove walls of the cutting grooves 21.

[0096] Specifically, the third driving device 800 includes a cylinder 803 and a connecting rod 801 connected to the output end of the cylinder 803. The cylinder 803 is connected to the base 200 through a fixing plate member, and the output end of the cylinder 803 is used to drive the connecting rod 801 to expand and contract axially. The connecting rod 801 penetrates through the rotation centers of the turntable 300 and the cutting tool disc 600 from below the base 200. A movable guide member 802 is sleeved on the outer peripheral side of the output end of the connecting rod 801. The guide member 802 is fixedly connected to the cutting tool disc 600, and the guide member 802 is used to guide the connecting rod 801 to expand and contract axially to prevent the connecting rod 801 from shifting. The outer periphery of the end of the connecting rod 801 extending from the guide member 802 is respectively connected to the driving members 32 of the plurality of cutting tool mechanisms 100. In this way, when the cylinder 803 drives the connecting rod 801 to extend towards the cutting tool disc 600, it can push the plurality of driving members 32 to rotate together, thereby simultaneously eliminating the gaps between multiple groups of hairpin wires 211 and the groove walls of the cutting grooves 21.

[0097] In some embodiments, a hollow channel 900 is jointly formed by the cutting tool disc 600, the turntable 300, and the base 200 around the connecting rod 801. The receiving groove 11 of the support frame 1 of the cutting tool mechanism 100 is communicated with the hollow channel 900, and the hollow channel 900 is used to discharge the ends of the hairpin wires 211 to be cut.

[0098] As Figure 3 and Figure 8 shown, the support frame 1 of the cutting tool mechanism 100 has a receiving groove 11. A hollow channel 900 is jointly formed by the cutting tool disc 600, the turntable 300, and the base 200 around the connecting rod 801. The receiving grooves 11 of the plurality of cutting tool mechanisms 100 are all communicated with the hollow channel 900. In this way, the ends of the hairpin wires 211 cut by the plurality of cutting tool mechanisms 100 can fall from the receiving grooves 11 of their respective support frames 1 into the hollow channel 900, and a collection bin can be arranged below the hollow channel 900 to facilitate timely cleaning of the cut waste materials.

[0099] Therefore, the flattening device 1000 for the stator winding provided by the embodiments of the present application, adopting the plurality of cutting tool mechanisms 100 of the embodiments of the present application, can not only reduce the possibility of deformation of the ends of the hairpin wires in the stator winding during the cutting process by the moving blade 4, but also improve the end cutting efficiency of the stator winding and the product qualification rate of the subsequent welding process.

[0100] As described above, it is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A cutting mechanism, characterized in that: include: A support frame having a receiving slot; a stationary knife, covering the receiving groove, the stationary knife being provided with a cutting groove communicating with the receiving groove, the cutting groove being used for inserting an end of the target object therein and penetrating into the receiving groove; A clearance eliminating assembly, comprising a sliding member and a driving member, wherein the sliding member is movably connected to the support frame, a hanging portion is provided on a side of the sliding member away from the support frame, the driving member is pivotally connected to the hanging portion, and when the driving member rotates, the sliding member can be driven to abut against the static knife and push the static knife to move, so as to eliminate the clearance between the target object and the groove wall of the cut groove; as well as A movable knife is movably disposed in the receiving groove, and the movable knife can move toward the cutting groove in a direction opposite to the moving direction of the stationary knife to shear the end of the target object; The anti-backlash assembly further comprises a compressible reset member, which is arranged between a side of the stationary knife away from the sliding member and the support frame; The cutting knife mechanism also includes a pressure plate, which is arranged on the support frame. The pressure plate is provided with a guide groove for accommodating the static knife. One end of the pressure plate is also provided with a slide groove connected to the guide groove. The side of the sliding member facing the support frame is provided with a driving part connected to the hanging part, and the driving part is embedded in the slide groove and abuts against the static knife.

2. The cutting mechanism according to claim 1, characterized in that: The driving member is arranged at a preset angle with the hanging portion in an initial position, and when the driving member rotates relative to the hanging portion, the distance between the end of the driving member away from the hanging portion and the support frame remains unchanged.

3. The cutting mechanism according to claim 1, characterized in that: The cutting knife mechanism also includes a propulsion assembly, which is movably connected to the support frame. One end of the propulsion assembly can extend into the accommodating groove and is fixedly connected to the movable knife to drive the movable knife to move.

4. The cutting mechanism according to claim 3, characterized in that: The movable knife is located on a side of the propulsion assembly facing the stationary knife. An elastic member is provided between the propulsion assembly and the movable knife. The elastic member is used to push the movable knife to fit the stationary knife.

5. The cutting mechanism according to claim 4, characterized in that: The propulsion assembly includes a first propulsion member and a second propulsion member arranged in a stacked manner. The movable knife is located on a side of the second propulsion member away from the first propulsion member. The first propulsion member is fixedly connected to the second propulsion member via a fastener, and the second propulsion member is movably connected to the movable knife via a positioning pin. A groove for accommodating the elastic member is provided on the side of the second propulsion member facing the movable knife.

6. The cutting mechanism according to claim 1, characterized in that: The number of the cutting grooves is multiple, and the multiple cutting grooves are arranged on the stationary knife side by side and at intervals along the moving direction of the movable knife.

7. A cutting device for stator windings, the stator windings comprising a plurality of groups of hairpin wires spaced apart along the circumference of the stator windings, characterized in that: The cutting device comprises: Base; and The cutter mechanism according to any one of claims 1 to 6 is arranged on the base, and the movable knife of the cutter mechanism can move along the radial direction of the stator winding to shear the ends of at least one group of the hairpin wires.

8. The stator winding trimming device according to claim 7, characterized in that: The cutting device further comprises a rotating disk, which is rotatably connected to the base and is disposed around the outer circumference of the cutting mechanism. A cam groove extending along its circumference is disposed on the rotating disk, and a distance between the cam groove and the rotation center of the rotating disk gradually changes along the circumference. The cutting mechanism includes a propulsion assembly, and a cam capable of being accommodated in the cam groove is arranged at one end of the propulsion assembly away from the movable knife. When the rotating disk rotates, the movable knife can be pushed toward the rotation center by the propulsion assembly to cut the ends of at least one group of the hairpin wires.

9. The stator winding trimming device according to claim 8, characterized in that: The cutting device further comprises a first driving device, which is connected to the base, and an output end of the first driving device is used to drive the rotating disk to rotate relative to the base.

10. The stator winding trimming device according to claim 8 or 9, characterized in that: There are multiple cutter mechanisms, and the multiple cutter mechanisms are arranged on the base at intervals along the circumferential direction; The rotating disk is provided with a plurality of cam grooves, and the plurality of cam grooves are arranged in one-to-one correspondence with the plurality of cutting mechanisms.

11. The stator winding trimming device according to claim 10, characterized in that: The cutting device also includes a turntable, a cutting disc and a second driving device. The turntable is rotatably connected to the base. The rotating disc and the cutting disc are coaxially arranged with the turntable and fixedly connected. The cutting mechanism is located on the side of the cutting disc away from the turntable. The second driving device is connected to the base, and the output end of the second driving device is connected to the turntable to drive the cutting disc and the rotating disc to rotate together through the turntable.

12. The stator winding trimming device according to claim 11, characterized in that: The cutting device further comprises a third driving device, wherein the third driving device comprises a retractable connecting rod, and the connecting rod is arranged at the rotation center of the rotating disk; The cutter mechanism includes an anti-backlash component, which includes a driving member. The output end of the connecting rod is connected to the driving members of multiple cutter mechanisms, and is used to drive the multiple driving members to rotate together, so that the stationary knives of the multiple cutter mechanisms move in a direction away from the rotation center.

13. The stator winding trimming device according to claim 12, characterized in that: The cutter disc, the turntable and the base together form a hollow channel around the connecting rod. The receiving groove of the support frame of the cutter mechanism is connected to the hollow channel, and the hollow channel is used to discharge the cut end of the hairpin wire.

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