CN112039298A

CN112039298A - Device and method for twisting end of stator of flat wire motor

Info

Publication number: CN112039298A
Application number: CN202010766711.5A
Authority: CN
Inventors: 刘蕾; 石爱文; 吴洋; 胡冬宝; 沐俊宏
Original assignee: Anhui Juyi Technology Co Ltd
Current assignee: Anhui Juyi Technology Co Ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2020-12-04
Anticipated expiration: 2040-08-03
Also published as: CN112039298B

Abstract

The invention discloses a device for twisting the end part of a flat wire motor stator, which comprises a clamp positioning mechanism, a clamp positioning mechanism and a clamp driving mechanism, wherein the clamp positioning mechanism is used for positioning and transporting the stator; the flaring mechanism is used for enabling the end part of the stator coil to move along the radial direction of the stator core, and the head twisting mechanism is used for twisting the end of the flared flat wire; and the base is used for installing the twisting head mechanism and the flaring mechanism. The invention also provides a method for twisting the end part of the stator of the flat wire motor, which comprises the following steps: positioning, twisting the head for the first time and twisting the head again. A method for partially and layer-flaring an end of a stator of a flat wire motor comprises the following steps: positioning, primary flaring, secondary flaring and the like. Through setting up flaring mechanism, the contact surface of flaring part and flat line is less, guarantees that every line can both insert and turn round first mould, guarantees the accuracy of plug wire and improves the qualification rate of turning round the head, realizes full-automatic flaring, has both saved the manpower, has improved flaring efficiency, can guarantee the accuracy of plug wire again and improve the qualification rate of turning round the head.

Description

Device and method for twisting end of stator of flat wire motor

Technical Field

The invention relates to the technical field of motor assembling equipment, in particular to a device and a method for twisting a head at the end part of a flat wire motor stator.

Background

With the vigorous advocation of energy conservation and environmental protection in China, new energy automobiles are rapidly developed. The driving motor plays a vital role as a core component of the new energy automobile. In the process of assembling the driving motor, the stator of the driving motor needs to be subjected to layered twisting.

Because the number of flat wire layers that new energy automobile driving motor stator required is more and more (has reached 8 layers at present), the mould notch that the stator flat wire corresponds also increases at double, and a line can not all lead to turning round the failure of head in inserting the mould, and the more stator flat wire number of layers greatly increased the degree of difficulty of turning round the head, and the requirement can guarantee the accuracy of inserting the line in the production.

The stator flat wire layer number that current technical scheme aimed at is few, generally is 4 layers, and mostly is semi-automatic equipment, and the flaring needs manual frock, and the flat wire is also artifical supplementary and is confirmed when inserting the mould.

However, when the flaring is performed by using a manual tool, the efficiency is low, the stability is poor, the flat wire paint film is easy to damage in the flaring process, and the flaring consistency is poor, so that the head can be twisted after the wire is inserted and confirmed by manual assistance, and the production rhythm is greatly influenced.

For example, U.S. patent No. 11/728258 discloses a method and apparatus for removing wires from a twister and placing them in a rotor or stator pack that performs wire insertion and twisting functions, but which is difficult to handle for multi-layer coil end twisting.

For another example, chinese patent CN201810909022.8 discloses an automatic wire inserting and twisting device for a HP flat wire stator of a generator, which is used for inserting and twisting up and down copper wires in the HP flat wire stator.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a device and a method for twisting the end part of the stator of a flat wire motor, so as to improve the flaring efficiency and the twisting efficiency of the stator and realize batch production.

The invention provides a device for twisting the end part of a flat wire motor stator, which comprises a clamp positioning mechanism, a stator and a motor, wherein the clamp positioning mechanism is used for positioning and transporting the stator; the flaring mechanism is used for enabling the end part of the stator coil to move along the radial direction of the stator core; the head twisting mechanism is used for twisting the head of the flared flat wire; and the base is used for installing the twisting head mechanism and the flaring mechanism and is provided with a vertical guide rail in sliding fit with the flaring mechanism.

Further, the flaring mechanism comprises a slot-expanding sliding plate, a slot-expanding angle frame, a flaring assembly and a first servo transmission assembly for controlling the operation of the flaring assembly, wherein the flaring assembly comprises a pin plate, a rotating plate and a plurality of flaring pin sheets which stretch along the radial direction of the pin plate, and the flaring pin sheets move for a plurality of times along the radial direction of the stator core so as to realize layered flaring of the end part of the stator coil; the front end of the flaring pin sheet is provided with a strip-shaped flaring hole and an open baffle groove, the flaring hole is used for sheathing a plurality of layers of flat wires to be flared and can pull the sheathed flat wires to move outwards along the radial direction, and the baffle groove is used for pushing the flat wires to move inwards and pressing the flat wires on the die wall of the twisting head mechanism.

Furthermore, the twisting head mechanism comprises an outer die, an inner die, a guide core sleeve and a servo control mechanism arranged on the outer die and the inner die, wherein the outer die and the inner die are sleeved on two adjacent layers of the flat wires and are twisted along opposite directions to complete twisting of the flat wires.

Further, the twisting head mechanisms are divided into N/2 groups according to the number N of layers of the flat wires in the stator; namely, the twisting head mechanism comprises N/2 groups of twisting dies.

Further, the fixture positioning mechanism comprises an upper bolt assembly and a lower bolt assembly which are similar to the flaring assembly in structure, wherein the upper bolt assembly comprises an upper sliding bolt plate, an upper rotating plate and a plurality of limiting pin pieces; the lower bolt component comprises a lower sliding bolt plate, a lower rotating plate and a plurality of limiting pin pieces, wherein the limiting pin pieces move along the radial direction and can be inserted between two rows of circumferentially adjacent flat wires to realize circumferential positioning of the flat wires.

Furthermore, a swing shaft driving assembly is arranged on the lower side of the clamp positioning mechanism and used for driving a swing shaft arranged between the upper rotating plate and the lower rotating plate to move, wherein the swing shaft driving assembly comprises a second servo motor, a synchronous belt, a ball screw, a nut seat and a pushing block.

Further, the lower side of the fixture positioning mechanism is further provided with a lower sliding table supporting mechanism, and the lower sliding table supporting mechanism comprises a lower sliding table, a guide positioning mechanism for supporting and positioning the fixture positioning mechanism, a guide sliding block connected with the vertical guide rail and a servo driving mechanism for controlling the fixture positioning mechanism to move up and down.

Further, guiding orientation mechanism is including setting up a pair of horizontal guide of slip table both sides under and the subassembly that compresses tightly that sets up on the horizontal guide upside, anchor clamps positioning mechanism still includes guide rail strip and the slide bearing that is equipped with symmetrical arrangement on bottom plate, the bottom plate, guide rail strip with horizontal guide compress tightly the subassembly cooperation, it is right in order to realize anchor clamps positioning mechanism's direction and compress tightly.

Further, the upper side of the horizontal guide rail is further provided with a plug pin positioning assembly, positioning sleeves are symmetrically arranged on the bottom plate and matched with the plug pin positioning assembly, so that the fixture positioning mechanism can be positioned.

The invention provides a method for partially layering and flaring the end of a stator of a flat wire motor, which comprises the following steps:

s1, positioning: moving the fixture positioning mechanism provided with the stator to a to-be-layered flaring station;

s2, primary flaring: the flaring mechanism sleeves the upper ends of all layers of flat wires except the innermost two layers and pulls the flat wires to move outwards;

s3, secondary flaring: the flaring mechanism rises and adjusts the position to descend again to sleeve the flat wire needing secondary flaring, the flaring mechanism pulls the flat wire needing secondary flaring to move outwards,

s4, repeating the step S3: and finishing the flaring of all the layers of flat wires.

The invention also provides a method for twisting the end part of the flat wire motor stator, which comprises the following steps:

s1, positioning: moving the twisting head mechanism and the stator to a working position;

s2, primarily twisting the head, wherein the flaring mechanism extends out to abut against the end parts of the two layers of flat wires at the innermost side, the end parts of the two layers of flat wires at the innermost side are aligned with the head twisting mechanism, then the flaring mechanism is moved away from the upper ends of the flat wires and is contracted to return, then the end parts of the two layers of flat wires at the innermost side are inserted into the head twisting mechanism, the inner die and the outer die of the head twisting mechanism rotate in opposite directions, and the head twisting process of the two layers of flat wires at the innermost side;

s3, twisting the head again: and (5) replacing the twisting die, and sequentially completing twisting of all the flat wires according to the working step in S2.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the device and the method for twisting the end of the stator of the flat wire motor, the flaring mechanism capable of flaring in a layered mode is arranged, full-automatic flaring is achieved, the contact surface between the flaring part and the flat wire is small, each wire can be inserted into a twisting head die, the accuracy of wire insertion is guaranteed, the qualified rate of twisting heads is improved, labor is saved, flaring efficiency is improved, and the paint film of the flat wire is not damaged.

2. The device of the invention adopts the mode of flaring the end part of the stator coil and then positioning and inserting the twisting mechanism, thereby protecting the coil from being damaged when the end part of the stator coil is inserted and twisted, and simultaneously effectively improving the accuracy of wire insertion.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is an isometric view of an apparatus for twisting heads at the stator end of a flat wire motor of the present invention;

FIG. 2 is a cross-sectional view of a flat wire motor stator end twist head apparatus of the present invention;

FIG. 3 is a front view of a lower sliding table supporting mechanism in the device for twisting heads at the end part of a flat wire motor stator according to the invention;

FIG. 4 is a cross-sectional view of a lower sliding table support mechanism in the flat wire motor stator end twisting head device of the present invention;

FIG. 5 is an isometric view of a fixture positioning mechanism in the flat wire motor stator end wrench apparatus of the present invention;

FIG. 6 is a half sectional view of a fixture positioning mechanism in the flat wire motor stator end wrench apparatus of the present invention;

FIG. 7 is an isometric view of a flaring mechanism in the flat wire motor stator end wrench apparatus of the present invention;

FIG. 8 is a half sectional view of a flaring mechanism in the flat wire motor stator end twisting head device of the present invention;

fig. 9 is a schematic structural diagram of a head twisting mechanism in the head twisting device for the stator end of the flat-wire motor according to the present invention;

fig. 10 is a half sectional view of a twisting head mechanism in the flat wire motor stator end twisting head apparatus of the present invention;

FIG. 11 is a schematic view of the flaring assembly of the flat wire motor stator end wrench device of the present invention;

fig. 12 is a state diagram before the flaring of the flat wire in the device for twisting the end of the flat wire motor stator according to the invention;

fig. 13 is a state diagram of the single flaring of the flat wire in the device for twisting the end of the stator of the flat wire motor according to the invention;

FIG. 14 is a view showing the positional relationship of the first group of flat wires before they are inserted into the twisting mold in accordance with the present invention;

FIG. 15 is a schematic view of a partial structure of an upper plug pin assembly after two adjacent groups of flat wires are divided and limited;

FIG. 16 is a schematic structural view of a stator of the present invention before twisting; and

fig. 17 is a schematic structural diagram of a twisted stator of the present invention.

Description of the reference numerals

1. A latch positioning assembly; 2. a compression assembly; 3. a horizontal guide rail; 4. a lower sliding table; 5. a servo motor II; 6. a synchronous belt; 7. a ball screw; 8. a nut seat; 9. a pushing block; 10. a balance cylinder; 11. a servo drive mechanism; 12. a vertical guide rail;

13. a base plate; 14. a guide rail bar; 15. a sliding bearing; 16. a positioning sleeve; 17. a lower latch assembly; 18. an upper plug pin assembly; 19. the clamp is used for mounting a plate; 20. connecting the columns; 22. an upper rotating plate; 23. a lower rotating plate; 24. a pendulum shaft;

25. a slot expanding sliding plate; 26. a flaring assembly; 27. a first servo transmission component; 28. flaring pin sheets; 281. a flared hole; 282. a baffle groove; 29. a limit pin sheet; 30. a slot expanding angle frame; 31. a connecting pin; 32. a rotating plate; 33. a latch plate; 34. blocking edges; 35. an outer mold; 36. an inner mold; 37. a guide core sleeve;

100. a flaring mechanism; 200. a clamp positioning mechanism; 300. a lower slipway support mechanism; 400. a head twisting mechanism; 500. a stator; 510. a flat wire.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1-17 illustrate some embodiments according to the invention.

As shown in fig. 1, 2 and 9, a device for twisting a stator end of a flat-wire motor comprises a base, a lower sliding table supporting mechanism 300, a flaring mechanism 100, a fixture positioning mechanism 200 and a twisting mechanism, wherein the fixture positioning mechanism 200 is used for positioning and transporting a stator 500, and the lower sliding table supporting mechanism 300 is used for supporting and positioning the fixture positioning mechanism 200 and controlling the stator to move up and down.

The flaring mechanism 100 is used for flaring the stator flat wire 510 in a layered mode, the head twisting mechanism 400 is located right above the flaring mechanism 100 and used for twisting the stator flat wire 510 fixed on the clamp positioning mechanism 200, so that the stator 500 achieves the purposes of flaring in a layered mode and twisting heads, and during operation, the centers of the annular devices of the four components are overlapped.

Specifically, as shown in fig. 7 and 8, the flaring mechanism 100 includes a vertically arranged slot-expanding slide plate 25, a horizontally arranged slot-expanding corner bracket 30, a first servo transmission assembly 27, and a flaring assembly 26. The groove expanding angle frame 30 is fixed on the groove expanding sliding plate 25, the flaring assembly 26 is installed on the groove expanding angle frame 30, the servo transmission assembly I27 installed on the groove expanding sliding plate 25 drives the flaring assembly 26 to begin flaring work, and flaring of the flat wire 510 is achieved.

The back of the slot-expanding sliding plate 25 is provided with a guide sliding block, the slot-expanding sliding plate 25 is connected to the vertical guide rail 12 of the base through the guide sliding block, the flaring mechanism 100 moves up and down along the vertical guide rail 12 through a servo driving assembly (not shown) connected to the flaring mechanism, and the two movements coordinate to complete the action of twisting the head.

As shown in fig. 11, the flaring assembly 26 is a radial telescopic structure capable of simultaneously extending and retracting a plurality of sliding pieces in a circular radial direction, the radial telescopic structure includes a latch plate 33, a rotating plate 32, and a plurality of flaring pin pieces 28, the latch plate 33 has a plurality of radially extending sliding slots, the plurality of sliding slots are distributed in an annular array on the latch plate 33, and the plurality of flaring pin pieces 28 are installed in the sliding slots of the latch plate 33 and can slide along the sliding slots.

The rotating plate 32 is provided with a plurality of arc-shaped track grooves, the side face of the flaring pin sheet 28, which is close to one side of the rotating plate 32, is fixedly provided with a connecting pin 31, the connecting pin 31 extends into the arc-shaped track grooves, one side of the rotating plate 32 is also provided with a bulge, and the first servo transmission assembly 27 can be abutted against the bulge and is used for driving the rotating plate to rotate.

The arc-shaped track groove extends along the circumferential direction and the radial direction of the rotating plate 32 to form an inclined arc-shaped track, when the first servo transmission assembly 27 drives the rotating plate 32 to rotate, the position of the arc-shaped track groove changes along with the rotating plate 32, and because the connecting pin 31 is limited by the arc-shaped track groove, the flaring pin sheet 28 is limited by the sliding groove in the bolt plate 33, the connecting pin 31 can drive the flaring pin sheet 28 to radially move in the sliding groove of the bolt plate 33, and therefore the function that a plurality of sliding blocks simultaneously stretch along the radial direction of a circle is achieved.

As shown in fig. 11 and 12, the front ends of the flaring pins 28 are provided with strip-shaped flaring holes 281 which are vertically through, and the strip-shaped flaring holes 281 can at least cover the upper parts of six layers of flat wires 510 which are radially arranged; when each group of the flared holes 281 is sleeved on the flat wire 510 at the corresponding position, the flared pin pieces 28 move outwards in the sliding groove of the pin plate 33, and the flared holes 281 pull the flat wire 510 at the outer layer to move outwards in the radial direction to a set position, so that the radially adjacent flat wires keep a set distance, thereby completing the flaring of the flat wire 510.

As shown in fig. 9, 10 and 14, the twisting dies are located right above the flaring mechanism 100 (not shown in the general drawing) and fixed on the equipment base, the twisting head mechanisms are divided into N/2 groups of dies according to the number N of layers of the flat wires 510 in the stator 500, and each group of twisting head mechanisms can twist two corresponding layers of the stator 500, wherein each group of twisting dies has a mandrel, an outer die 35, an inner die 36 and a guide core sleeve 37.

As shown in fig. 14, a plurality of first twisting mold grooves extending in the vertical direction are formed in the inner side of the outer mold 35, a plurality of second twisting mold grooves extending in the vertical direction are formed in the outer side of the inner mold, the first twisting mold grooves and the second twisting mold grooves are arranged in an annular array in the vertical direction, and each first twisting mold groove and each second twisting mold groove can completely sleeve one flat wire.

The upper ends of the outer die 35 and the inner die 36 are respectively provided with a servo control mechanism, and the servo control mechanisms can control the outer die 35 and the inner die 36 to twist in opposite directions. When two adjacent layers of the flat wires 510 on the stator 500 are respectively inserted into the first twisting mold groove and the second twisting mold groove on the outer mold 35 and the inner mold 36, the two adjacent layers of the flat wires 510 are twisted in different directions by the outer mold 35 and the inner mold 36 which are twisted in opposite directions, so that the purpose of twisting the flat wires 510 is achieved.

The inner die 36 is provided with a rib 34, the rib 34 protrudes out of the outer die 35 in the vertical direction, the rib 34 plays a role in dividing in the process that the flat wire 510 is inserted into the first twisting die groove and the second twisting die groove, wherein the rib 282 arranged at the front end of the flaring pin piece 28 can push the flat wire to move inwards and press the rib 34, so that the flat wire 510 needing to be twisted can be accurately inserted into the outer die 35 and the inner die 36.

The mandrel is arranged at the innermost side of the twisting die, and when the upper position and the lower position of the mandrel before flaring of the stator are adjusted, the mandrel is used for protecting the flat wire at the innermost side from offsetting towards the center, so that the problem that the flat wire at the innermost side cannot be inserted into a twisting die groove I and a twisting die groove II on a head twisting mechanism, and the head twisting cannot be finished is avoided.

Specifically, as shown in fig. 3 and 4, lower sliding table supporting mechanism 300 includes lower sliding table 4 that the level set up, 4 upsides of lower sliding table are equipped with guiding orientation mechanism, guiding orientation mechanism includes horizontal guide rail 3, compress tightly subassembly 2, and bolt locating

component

1, 4 both sides of lower sliding table have a pair of

horizontal guide rail

3, 3 upsides of every horizontal guide rail have one set and compress tightly subassembly 2 and one set of bolt locating component 1, horizontal guide rail 3, compress tightly subassembly 2, bolt locating component 1 all fixes on lower sliding table 4, the three accomplishes the direction to clamp locating mechanism 200 jointly, fix a position and compress tightly.

As shown in fig. 5 and 6, the fixture positioning mechanism 200 is a tray-like structure for conveying and positioning the stator 500, and includes a bottom plate 13, guide rails 14 symmetrically disposed at the bottom of the bottom plate 13, and sliding bearings 15, which cooperate to carry the stator 500 and slide on the horizontal guide rails 3 of the lower slide supporting mechanism 300, and a positioning sleeve 16 mounted on the bottom plate 13 for positioning the fixture positioning mechanism 200 at each position.

The guide rail bar 14 and the sliding bearing 15 can be matched with the horizontal guide rail 3, so that the bottom plate 13 can horizontally move along the horizontal guide rail 3, that is, the clamp positioning mechanism 200 can horizontally move on the lower sliding table supporting mechanism 300; the pin positioning assembly 1 is matched with the positioning sleeve 16 on the bottom plate 13, so that the horizontal positioning of the bottom plate 13 can be realized, and the horizontal positions of the fixture positioning mechanism 200 and the lower sliding table supporting mechanism 300 are kept relatively fixed.

When the guide rail bar 14 is matched with the horizontal guide rail 3 and the bolt positioning assembly 1 is matched with the positioning sleeve 16, the pressing assembly 2 is pressed on the bottom plate 13 to limit the upward movement of the bottom plate 13, namely, the vertical position of the clamp positioning mechanism 200 is limited.

As shown in fig. 3 and 4, a swing shaft driving assembly is further arranged below the lower sliding table 4, the swing shaft driving assembly comprises a second servo motor 5, a synchronous belt 6, a ball screw 7, a nut seat 8 and a pushing block 9, and the second servo motor 5 is in transmission connection with the synchronous belt 6; two ends of the ball screw 7 are fixed on the equipment base through bearing seats, and one end of the ball screw 7 is in transmission connection with the synchronous belt 6; the nut seat 8 is arranged in the middle of the ball screw 7 and is in threaded fit with the ball screw 7; the pushing block 9 is fixedly connected with the nut seat 8; the second servo motor 5 can drive the synchronous belt 6 to rotate, the synchronous belt 6 drives the ball screw 7 to rotate, and then the nut seat 8 and the pushing block 9 are driven to move left and right.

As shown in fig. 3 and 4, the rear mounting surface of the lower sliding table 4 is provided with a guiding slider mechanism, the vertical guide rail 12 is fixed on the equipment base, the lower part of the lower sliding table 4 is connected with two groups of balance cylinders 10 and servo driving mechanisms 11 at the same time, the balance cylinders 10 and the servo driving mechanisms 11 are both fixed on the equipment base, the balance cylinders 10 and the servo driving mechanisms 11 drive the lower sliding table 4 to move, that is, the servo driving mechanisms 11 control the whole lower sliding table supporting mechanism 300 to move up and down along the vertical guide rail 12, wherein the servo driving mechanisms 11 are driving structures adopting servo motors and ball screws, and can accurately control the distance of the up and down movement of the flaring mechanism 100.

Specifically, as shown in fig. 5 and 6, the fixture positioning mechanism 200 further includes an upper plug pin assembly 18 and a lower plug pin assembly 17, the upper plug pin assembly 18 is fixed on the upper side of the bottom plate 13 through the fixture upper plate 19 and the connecting column 20, and the lower plug pin assembly 17 is fixed on the lower side of the bottom plate 13.

As shown in fig. 5 to 8, the upper plug pin assembly 18 and the lower plug pin assembly 17 are similar to the flaring assembly 26 in structure and are radial telescopic structures capable of simultaneously extending and retracting a plurality of sliding pieces along a circular radial direction, wherein the upper plug pin assembly 18 includes an upper sliding plug pin plate, an upper rotating plate 22, and a plurality of limit pin pieces 29; the lower latch assembly 17 includes a lower sliding latch plate, a lower rotating plate 23, and a plurality of limit pins 29.

The upper sliding bolt plate and the lower sliding bolt plate are similar to the bolt plate 33 in structure, the upper rotating plate 22 and the lower rotating plate 23 are similar to the rotating plate 32 in structure, the flaring pin pieces 28 are similar to the limiting pin pieces 29 in structure, protrusions are arranged on one sides of the upper rotating plate 22 and one side of the lower rotating plate 23, and the protrusions on the upper rotating plate 22 and the protrusions on the lower rotating plate 23 are connected together through the swing shafts 24 respectively so that the upper rotating plate 22 and the lower rotating plate 23 can rotate simultaneously.

Meanwhile, the position of the swing shaft 24 on the fixture positioning mechanism 200 corresponds to the position of the pushing block 9 on the lower sliding table supporting mechanism 300, the swing shaft 24 can be driven to move through the operation of the servo motor II 5, and the swing shaft 24 drives the upper rotating plate 22 and the lower rotating plate 23 to rotate.

When the stator 500 is placed in the fixture positioning mechanism 200, the pushing block 9 of the swing shaft driving assembly on the lower sliding table supporting mechanism 300 drives the swing shaft 24 to rotate, and further drives the upper rotating plate 22 and the lower rotating plate 23 to rotate simultaneously, the upper rotating plate 22 and the lower rotating plate 23 can rotate to drive the plurality of limiting pin pieces 29 to do radial contraction motion in the upper sliding pin plate, and the lower rotating plate 23 can rotate to drive the plurality of limiting pin pieces 29 to do radial contraction motion in the lower sliding pin plate.

As shown in fig. 15, the plurality of limit pins 29 arranged in the annular array on the upper plug pin assembly 18 and the lower plug pin assembly 17 move inward to separate the circumferentially adjacent flat wires 510 in the stator 500, and circumferentially position the middle of the flat wires, so that the middle of the flat wires 510 is always kept relatively stable in the processes of flaring the flat wires 510 and twisting the ends, the positions of the flat wires 510 after flaring and twisting the ends are more accurate, and the limit pins are used for protecting the insulating paper from being damaged in the process of twisting the ends.

The working process of the device for twisting the end part of the flat wire motor stator is as follows:

firstly, a feeding servo (not shown) of the previous process moves the fixture positioning mechanism 200 with the stator 500 to a station to be twisted along the horizontal guide rail 3, the plug pin positioning assembly 1 extends out and is inserted into the positioning sleeve 16, the pressing assembly 2 extends out of the pressing fixture positioning mechanism 200 to be fixed on the lower sliding table supporting mechanism 300, the lower sliding table supporting mechanism 300 moves upwards for a certain distance integrally, the mandrel moves to support the flat wire 510 at the innermost layer of the stator 500, and the flaring mechanism 100 descends for a certain distance to enable the flaring pin sheet 28 to just sleeve the flat wire 510 to be flared.

Then, the servo mechanism drives the upper plug pin assembly 18 and the lower plug pin assembly 17 on the fixture positioning mechanism 200 to operate, so that the plurality of limit pin pieces 29 arranged in the annular array on the upper plug pin assembly 18 and the lower plug pin assembly 17 move inwards and are inserted between two rows of circumferentially adjacent flat wires 510 to circumferentially position the flat wires.

Then, the first servo transmission assembly 27 drives the rotating plate 32 in the flaring assembly 26 to rotate, so that the flaring pin pieces 28 retract to stretch the flat wire 510 outwards, the flat wire 510 moves to a set position, the specific state is shown in fig. 11 and 12, after the action is finished, the flaring mechanism 100 rises to separate from the flat wire 510, the flaring pin pieces 28 are adjusted to the set position again, the flaring mechanism 100 descends again to sleeve the flat wire 510 to be flared for the second time, and flaring of all the flat wires 510 is finished according to the method.

Then, after the flaring operation is completed, the lower sliding table supporting mechanism 300 is moved down to the original position, the flaring mechanism 100 is also moved down to the position below the mandrel, the mandrel is moved away, the twisting head die is moved to the working position, and the flaring mechanism 100 is moved back to the original position.

Then, the lower sliding table supporting mechanism 300 moves up to the set position, the flaring mechanism moves down to push the two innermost layers of flat wires 510 to be attached to the flanges 34 of the inner die 36, the lower sliding table supporting mechanism 300 moves up to enable the two innermost layers of flat wires 510 to be inserted into the first twisting die groove and the second twisting die groove of the twisting head mechanism 400, as shown in fig. 13, then the flaring pin pieces 28 retract, the flaring mechanism 100 moves up to the original position to avoid interference between the twisting head mechanism and the flaring mechanism 100, and the lower sliding table supporting mechanism 300 continues to move up to the twisting head position.

Then, the inner mold and the outer mold in the twisting head mechanism 400 rotate in opposite directions, and the lower sliding table supporting mechanism 300 moves up slowly along with the twisting motion, thereby completing the twisting head process of the two adjacent layers of the flat wires 510.

And finally, switching the die steps according to the steps, switching to a second group of twisting dies, repeating the step of twisting the head to complete the step of twisting the head of the flat wire, switching a third group of twisting dies and a fourth group of twisting dies again, and repeating the step of twisting the head again to complete the step of twisting the head of all the flat wires.

After twisting, the lower sliding table supporting mechanism 300 returns to the original position to enable the flat wire 510 to exit from the twisting head mold, the twisting head assembly returns to the original position and automatically switches the next group of twisting head molds to the working position, and the actions are repeated to finish twisting heads of all layers of flat wires 510.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a device of head is turned round to flat wire motor stator tip which characterized in that includes:

a jig positioning mechanism (200) for positioning and transporting the stator (500);

a flaring mechanism (100) for moving the end of the stator coil in the radial direction of the stator core;

the head twisting mechanism (400) is used for twisting the head of the flared flat wire (510); and

a base for mounting the wrench head mechanism (400) and the flaring mechanism (100), having a vertical guide rail (12) in sliding fit with the flaring mechanism (100).

2. The device for twisting the ends of the stator of the flat wire motor according to claim 1, wherein the flaring mechanism (100) comprises a slot-expanding sliding plate (25), a slot-expanding angle bracket (30), a flaring assembly (26) and a first servo transmission assembly (27) for controlling the operation of the flaring assembly (26), the flaring assembly (26) comprises a pin plate (33), a rotating plate (32) and a plurality of flaring pin sheets (28) which stretch and retract along the radial direction of the pin plate, and the flaring pin sheets (28) move for a plurality of times along the radial direction of the stator core to realize layered flaring of the ends of the stator coil; the front end of the flaring pin sheet (28) is provided with a long strip flaring hole (281) and an open blocking groove (282), the flaring hole (281) is used for sheathing a plurality of layers of flat wires (510) to be flared and can pull the sheathed flat wires (510) to move outwards along the radial direction, and the blocking groove (282) is used for pushing the flat wires to move inwards and pressing the flat wires on the die wall of the twisting head mechanism (400).

3. The device for twisting the stator end of the flat wire motor according to claim 1, wherein the twisting head mechanism (400) comprises an outer die (35), an inner die (36), a guide core sleeve (37) and servo control mechanisms arranged on the outer die (35) and the inner die (36), and the outer die (35) and the inner die (36) are sleeved on two adjacent layers of the flat wire (510) and are twisted in opposite directions to complete twisting of the flat wire (510).

4. The device for twisting the ends of the flat wire motor stator according to claim 3, wherein the twisting mechanism (400) is divided into N/2 groups according to the number N of the layers of the flat wires (510) in the stator (500).

5. The flat wire motor stator end wrench device according to claim 1, wherein the clamp positioning mechanism (200) comprises an upper latch assembly (18) and a lower latch assembly (17) which are similar in structure to the flaring assembly (26), the upper latch assembly (18) comprises an upper sliding latch plate, an upper rotating plate (22) and a plurality of limit pins (29); the lower plug pin assembly (17) comprises a lower sliding plug pin plate, a lower rotating plate (23) and a plurality of limiting pin pieces (29), wherein the limiting pin pieces (29) move along the radial direction and can be inserted between two rows of circumferentially adjacent flat wires (510) to achieve circumferential positioning of the flat wires.

6. The flat wire motor stator end twisting device according to claim 5, wherein a swing shaft driving assembly is arranged at the lower side of the clamp positioning mechanism (200) and used for driving a swing shaft (24) arranged between the upper rotating plate (22) and the lower rotating plate (23) to move, wherein the swing shaft driving assembly comprises a second servo motor (5), a synchronous belt (6), a ball screw (7), a nut seat (8) and a pushing block (9).

7. The flat wire motor stator end twisting device according to claim 1, wherein a lower sliding table supporting mechanism (300) is further arranged on the lower side of the fixture positioning mechanism (200), and the lower sliding table supporting mechanism (300) comprises a lower sliding table (4), a guiding positioning mechanism for supporting and positioning the fixture positioning mechanism (200), a guiding sliding block connected with the vertical guide rail (12), and a servo driving mechanism (11) for controlling the fixture positioning mechanism (200) to move up and down.

8. The device of the flat wire motor stator end twisting head according to claim 7, wherein the guiding and positioning mechanism comprises a pair of horizontal guide rails (3) arranged at two sides of the lower sliding table (4) and a pressing assembly (2) arranged at the upper side of the horizontal guide rails (3), the fixture positioning mechanism (200) further comprises a bottom plate (13) and guide rail bars (14) and sliding bearings (15) which are symmetrically arranged on the bottom plate (13), and the guide rail bars (14) are matched with the horizontal guide rails (3) and the pressing assembly (2) to guide and press the fixture positioning mechanism (200).

9. The device for twisting the end of the flat wire motor stator according to claim 8, wherein a pin positioning assembly (1) is further arranged on the upper side of the horizontal guide rail (3), positioning sleeves (16) are symmetrically arranged on the bottom plate (13), and the positioning sleeves (16) are matched with the pin positioning assembly (1) to position the fixture positioning mechanism (200).

10. A method for partially layer-flaring an end of a flat-wire motor stator, which is characterized by using the device for twisting the end of the flat-wire motor stator according to any one of claims 1 to 9, and comprises the following steps:

s1, positioning: moving the fixture positioning mechanism (200) provided with the stator to a to-be-layered flaring station;

s2, primary flaring: the flaring mechanism (100) sleeves the upper ends of all layers of flat wires (510) except the innermost two layers and pulls the flat wires to move outwards;

s3, secondary flaring: the flaring mechanism (100) rises and adjusts the position to descend again to sleeve the flat wire (510) to be flared for the second time, the flaring mechanism (100) pulls the flat wire (510) to be flared for the second time to move outwards,

11. A method for twisting the end of a flat wire motor stator, which is characterized in that the device for twisting the end of the flat wire motor stator according to any one of claims 1 to 9 comprises the following steps:

s1, positioning: moving the twisting head mechanism (400) and the stator to a working position;

s2, primary twisting: the flaring mechanism (100) extends to abut against the end parts of the two innermost layers of flat wires (510), the end parts of the two innermost layers of flat wires (510) are aligned to the twisting head mechanism (400), then the flaring mechanism (100) is moved away from the upper ends of the flat wires (510) and is contracted and withdrawn, then the end parts of the two innermost layers of flat wires (510) are inserted into the twisting head mechanism (400), then the inner die and the outer die of the twisting head mechanism (400) rotate in opposite directions, and the twisting head process of the two innermost layers of flat wires (510) is completed;

s3, twisting the head again: and (4) replacing the twisting head mechanism (400), and sequentially completing twisting heads of all the flat wires (510) according to the working steps in the S2.