CN112039298A - A device and method for twisting the stator end of a flat wire motor - Google Patents

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

A device and method for twisting the stator end of a flat wire motor

technical field

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

Background technique

With the country's vigorous promotion of energy conservation and environmental protection, new energy vehicles have developed rapidly. As the core component of new energy vehicles, the drive motor plays a vital role. Among them, in the process of assembling the driving motor, the stator of the driving motor needs to be twisted in layers.

As the number of layers of flat wires required for the stator of the drive motor of new energy vehicles is increasing (currently it has reached 8 layers), the die slots corresponding to the flat wires of the stator have also increased exponentially, and the failure of one wire to be inserted into the mold will lead to The failure of twisting the head, the more layers of stator flat wires greatly increase the difficulty of twisting the head, and it is required to ensure the accuracy of the wiring during production.

The number of layers of the stator flat wire targeted by the existing technical solution is small, generally 4 layers, and most of them are semi-automatic equipment.

However, the use of manual tooling for flaring has low efficiency and poor stability. It is easy to damage the flat wire paint film during the flaring process. Because the flaring consistency is not good, it is necessary to manually insert the wire and confirm it before turning the head. , which greatly affects the beat of production.

For example, US Pat. No. 11/728258 discloses a method and apparatus for removing wires from a twister and placing them in a rotor or stator group, which implements wire insertion and twisting functions, but the apparatus and method are difficult to handle multi-layer coil ends twist.

For another example, Chinese patent CN201810909022.8 discloses a generator HP flat wire stator automatic wire insertion and twisting equipment, which is used to realize the insertion and up-and-down twist of the copper wire in the HP flat wire stator, but the equipment does not have the ability to handle multi-layer coils. End twist function.

SUMMARY OF THE INVENTION

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

To this end, the present invention proposes a device for twisting the end of the stator of a flat wire motor, including a fixture positioning mechanism for positioning and transporting the stator, which consists of a stator coil and an iron core; a flare mechanism for making the stator coil The end portion moves along the radial direction of the stator core; the twisting mechanism is used for twisting the flat wire after the flaring; and the base is used for installing the twisting mechanism and the flaring mechanism, and has the same The vertical guide rail that the flaring mechanism is slidingly matched with.

Further, the flaring mechanism includes a flaring slide plate, a flaring angle frame, a flaring assembly, and a servo drive assembly for controlling the operation of the flaring assembly. Several flared pin pieces that are radially retractable, the flared pin pieces move multiple times along the radial direction of the stator core to realize the layered flaring of the end of the stator coil; wherein, the front end of the flared pin piece is provided with A long strip-shaped flared hole and an open retaining groove, the flared hole is used to cover several layers of the flat wires to be flared, and can pull the flat wire to move radially outward, the retaining groove It is used to push the flat wire inward and press the flat wire against the mold wall of the twist head mechanism.

Further, the head twisting mechanism includes an outer mold, an inner mold, a guide core sleeve, and a servo control mechanism arranged on the outer mold and the inner mold, and the outer mold and the inner mold cover the two adjacent layers of the flat wire. , and twist in the opposite direction to complete the twist of the flat wire.

Further, the torsion mechanism is divided into N/2 groups according to the number of layers N of the flat wires in the stator; that is, the torsion mechanism includes N/2 groups of torsion molds.

Further, the clamp positioning mechanism includes an upper latch assembly and a lower latch assembly similar in structure to the flare assembly, and the upper latch assembly includes an upper sliding latch plate, an upper rotating plate, and a plurality of limit pin pieces; the The lower bolt assembly includes a lower sliding bolt plate, a lower rotating plate, and a number of limit pin pieces, wherein the limit pin pieces move in the radial direction and can be inserted between the two adjacent rows of the flat wires in the circumferential direction, so as to realize all the Circumferential positioning of the flat wire.

Further, a swing shaft drive assembly is provided on the lower side of the clamp positioning mechanism, and the swing shaft drive assembly is used to drive the swing shaft arranged between the upper rotating plate and the lower rotating plate to move, wherein the The swing shaft drive assembly includes a second servo motor, a synchronous belt, a ball screw, a nut seat, and a push block.

Further, the lower side of the fixture positioning mechanism is also provided with a sliding table support mechanism, and the sliding table supporting mechanism includes a sliding table, a guide positioning mechanism that supports and locates the fixture positioning mechanism, and is connected with the vertical guide rail. and a servo drive mechanism that controls the up and down movement of the clamp positioning mechanism.

Further, the guide positioning mechanism includes a pair of horizontal guide rails arranged on both sides of the sliding table and a pressing assembly arranged on the upper side of the horizontal guide rails, and the clamp positioning mechanism also includes a base plate and a symmetrically arranged guide rail on the base plate and a sliding bearing, the guide rail cooperates with the horizontal guide rail and the pressing component to realize the guiding and pressing of the clamp positioning mechanism.

Further, the upper side of the horizontal guide rail is also provided with a pin positioning assembly, and a positioning sleeve is symmetrically arranged on the bottom plate, and the positioning sleeve cooperates with the pin positioning assembly to realize the positioning of the clamp positioning mechanism.

The present invention provides a method for the partial layer flaring of the stator end of a flat wire motor. The steps are as follows:

S1. Positioning: move the fixture positioning mechanism equipped with the stator to the flaring station to be layered;

S2. Initial flaring: the flaring mechanism covers the upper ends of the flat wires of all layers 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 lower again to cover the flat wire that needs secondary flaring, and the flaring mechanism pulls the flat wire that needs secondary flaring to move outwards.

S4. Repeat step S3: complete the flaring of all layers of flat wires.

The invention also provides a method for twisting the stator end of the flat wire motor, the steps are as follows:

S1. Positioning: move the twisting mechanism and the stator to the working position;

S2. Turn the head for the first time, the flaring mechanism extends against the ends of the innermost two layers of flat wires, so that the ends of the innermost two layers of flat wires are aligned with the twist head mechanism, and then the flaring mechanism is removed from the upper end of the flat wire and retracted. Then insert the ends of the two innermost layers of flat wires into the twisting mechanism, and the inner and outer molds of the twisting mechanism rotate in opposite directions to complete the twisting process of the two innermost layers of flat wires;

S3. Twist the head again: replace the twisting die, and complete the twisting of all flat wires in turn according to the working steps in S2.

Compared with the prior art, the beneficial effects of the present invention:

1. The device and method for twisting the stator end of a flat wire motor according to the present invention can realize automatic flaring by setting a flaring mechanism that can flaring in layers. The contact surface between the flaring part and the flat wire is small, ensuring that each The wire can be inserted into the twisting die to ensure the accuracy of the wire insertion and improve the pass rate of the twisting, which not only saves manpower, improves the flaring efficiency, but also ensures that the flat wire paint film is not damaged.

2. The device of the present invention adopts the method of first flaring the end of the stator coil, and then positioning and inserting the torsion mechanism, which protects the coil from damage when the end of the stator coil is inserted and twisted, and effectively improves the accuracy of wire insertion.

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

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 is the axonometric view of the device for twisting the stator end of the flat wire motor according to the present invention;

Fig. 2 is the sectional view of the device for twisting the stator end of the flat wire motor according to the present invention;

3 is a front view of the lower table support mechanism in the device for twisting the stator end of the flat wire motor according to the present invention;

4 is a cross-sectional view of the lower table support mechanism in the device for twisting the stator end of the flat wire motor according to the present invention;

Fig. 5 is the axonometric view of the fixture positioning mechanism in the device for twisting the stator end of the flat wire motor according to the present invention;

6 is a half-section view of the clamp positioning mechanism in the device for twisting the stator end of the flat wire motor according to the present invention;

Fig. 7 is the axonometric view of the flaring mechanism in the device for twisting the stator end of the flat wire motor according to the present invention;

FIG. 8 is a half cross-sectional view of the flaring mechanism in the device for twisting the stator end of the flat wire motor according to the present invention;

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

10 is a half-section view of the twisting mechanism in the device for twisting the stator end of the flat wire motor according to the present invention;

11 is a schematic structural diagram of a flare assembly in the device for twisting the stator end of a flat wire motor according to the present invention;

Figure 12 is a state diagram of the flat wire motor stator end twisting device of the present invention before the flat wire starts to expand;

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

14 is a positional relationship diagram of the first group of flat wires before being inserted into the torsion die in the present invention;

Fig. 15 is a partial structural schematic diagram of the upper latch assembly after the adjacent two groups of flat wires are segmented and limited;

FIG. 16 is a schematic structural diagram of the stator of the present invention before the head is turned; and

FIG. 17 is a schematic view of the structure of the stator of the present invention after its head has been twisted.

Description of reference numerals

1. Pin positioning assembly; 2. Pressing assembly; 3. Horizontal guide rail; 4. Lower table; 5. Servo motor 2; 6. Timing belt; 7. Ball screw; 8. Nut seat; 9. Push block; 10 , Balance cylinder; 11. Servo drive mechanism; 12. Vertical guide rail;

13, bottom plate; 14, guide rail; 15, sliding bearing; 16, positioning sleeve; 17, lower bolt assembly; 18, upper bolt assembly; 19, upper plate of fixture; 20, connecting column; 22, upper rotating plate; 23, Lower rotating plate; 24. Swing shaft;

25. Grooving slide plate; 26. Flaring assembly; 27. Servo drive assembly 1; 28. Flaring pin piece; 281, Flaring hole; 282, Blocking groove; 29, Limiting pin piece; ;31, connecting pin; 32, rotating plate; 33, pin plate; 34, sidewall; 35, outer mold; 36, inner mold; 37, guide core sleeve;

100, flaring mechanism; 200, fixture positioning mechanism; 300, sliding table support mechanism; 400, twisting mechanism; 500, stator; 510, flat wire.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

1-17 illustrate some embodiments in accordance with the present invention.

As shown in Figure 1, Figure 2, Figure 9, a device for twisting the end of the stator of a flat wire motor includes a base, a lower table support 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 the stator 500, and the lower table supporting mechanism 300 is used for supporting the positioning fixture positioning mechanism 200 and controlling its up and down movement.

The flaring mechanism 100 is used for flaring the stator flat wire 510 in layers, and the twisting mechanism 400 is located directly above the flaring mechanism 100 and is used for twisting the stator middle flat wire 510 fixed on the fixture positioning mechanism 200 to make the stator 500 To accomplish the purpose of layered flaring and twisting, when working, the center of the ring device of the four components coincides.

Specifically, as shown in FIGS. 7 and 8 , the flaring mechanism 100 includes a vertically arranged flaring sliding plate 25 , a horizontally arranged flaring angle bracket 30 , a servo drive assembly 1 27 , and a flaring assembly 26 . The expansion angle bracket 30 is fixed on the expansion groove slide plate 25, and the flaring assembly 26 is installed on the expansion groove angle bracket 30. The expansion groove assembly 26 can be driven by the servo transmission assembly-27 installed on the expansion groove sliding plate 25 to start the expansion of the expansion groove. Work to realize the flaring of the flat wire 510 .

Among them, the back of the slot expansion slide plate 25 is provided with a guide slider, the slot expansion slider 25 is connected to the vertical guide rail 12 of the base through the guide slider, and the expansion mechanism 100 is connected to it through a servo drive assembly (not shown) It moves up and down along the vertical guide rail 12, and the two movements coordinate to complete the action when turning the head.

Among them, as shown in FIG. 11 , the flaring assembly 26 is a radial expansion and contraction structure capable of simultaneously expanding and contracting a plurality of sliding sheets in the radial direction of the circle. The pin plate 28, the pin plate 33 has a plurality of sliding grooves extending in the radial direction, a plurality of sliding grooves are distributed in a circular array on the bolt plate 33, and a plurality of flared pins 28 are installed and arranged in the sliding grooves of the bolt plate 33 and can be arranged along the sliding grooves of the bolt plate 33. The chute slides.

The rotating plate 32 is provided with a plurality of arc-shaped track grooves, and the side of the flared pin piece 28 close to the rotating plate 32 is fixedly mounted with a connecting pin 31, and the connecting pin 31 extends into the arc-shaped orbital groove, and the rotating plate 32 There is also a protrusion on one side, and the servo transmission component one 27 can interfere with the protrusion to drive the rotating plate to rotate.

The arc-shaped track groove extends along the combined direction of the circumferential and radial directions of the rotating plate 32 to form an inclined arc-shaped track. When the servo drive assembly 1 27 drives the rotating plate 32 to rotate, the position of the arc-shaped track groove With the change of the rotating plate 32, since the connecting pin 31 is restricted by the arc track groove, the flared pin 28 is restricted by the chute in the latch plate 33, so that the connecting pin 31 can drive the flared pin 28 on the latch plate 33. It moves radially in the chute, thereby realizing the function of simultaneous expansion and contraction of multiple sliding blocks along the radial direction of the circle.

Among them, as shown in Figures 11 and 12, the front end of the flared pin piece 28 is provided with a long strip-shaped flared hole 281 that runs through the vertical direction. The upper part of the wire 510; when each group of flared holes 281 covers the flat wire 510 at the corresponding position, the flared pin piece 28 moves radially outward in the chute of the latch plate 33, and the flared hole 281 then pulls the outer flat wire 510. The wire 510 moves radially outward to a set position, so that the radially adjacent flat wires maintain a set distance, so as to accomplish the purpose of expanding the flat wire 510 .

As shown in FIG. 9 , FIG. 10 , and FIG. 14 , the torsion die is located just above the flaring mechanism 100 (not shown in the general diagram), and is fixed on the equipment base. The torsion mechanism is based on the layer of the flat wire 510 in the stator 500 The number N is divided into N/2 groups of molds, each group of torsion mechanism can twist two corresponding layers of the stator 500 , wherein each group of torsion molds has a mandrel, an outer mold 35 , an inner mold 36 and a guide core sleeve 37 .

Among them, as shown in FIG. 14 , the inner side of the outer mold 35 is provided with a number of torsion mold grooves 1 extending in the vertical direction, the outer side of the inner mold is provided with a number of torsion mold grooves 2 extending in the vertical direction, a number of torsion mold grooves 1 and torsion mold grooves. The second die grooves are arranged in a circular row along the vertical direction, and each torsion die groove 1 and twist die groove 2 can completely cover a flat wire.

The upper ends of the outer mold 35 and the inner mold 36 are respectively provided with a servo control mechanism, and the servo control mechanism can control the outer mold 35 and the inner mold 36 to twist in opposite directions. When the two adjacent layers of flat wires 510 on the stator 500 are inserted into the torsion die slot 1 and the torsion die slot 2 on the outer die 35 and the inner die 36 respectively, the outer die 35 and the inner die 36 twisted in opposite directions make the adjacent two layers of flat wires The wire 510 is twisted in different directions to achieve the purpose of twisting the flat wire 510 .

Among them, the inner mold 36 has a rib 34, and the rib 34 protrudes from the outer mold 35 in the vertical direction. In the process of inserting the flat wire 510 into the first and second torsion mold grooves, the ribs 34 play a dividing role. The blocking groove 282 provided at the front end of the flared pin 28 can push the flat wire to move inward and press against the rib 34, so that the flat wire 510 that needs to be twisted can be inserted into the outer mold 35 and the inner mold 36 accurately.

Among them, the mandrel is set on the innermost side of the torsion die. When adjusting the upper and lower positions of the stator before flaring, the innermost flat wire will not be offset to the center, so that the innermost flat wire cannot be inserted into the twisting mechanism. Twisting die groove 1 and twisting die groove 2 cannot complete the twisting.

Specifically, as shown in FIG. 3 and FIG. 4 , the sliding table support mechanism 300 includes a horizontally arranged sliding table 4 , and a guiding and positioning mechanism is provided on the upper side of the sliding table 4 , and the guiding and positioning mechanism includes a horizontal guide rail 3 , a pressing assembly 2 , and Bolt positioning assembly 1, a pair of horizontal guide rails 3 on both sides of the sliding table 4, a set of pressing components 2 and a set of plug positioning components 1 on the upper side of each horizontal guide rail 3, horizontal guide rails 3, pressing components 2, and plug positioning components The components 1 are all fixed on the sliding table 4 , and the three together complete the guiding, positioning and pressing of the clamp positioning mechanism 200 .

As shown in FIG. 5 and FIG. 6 , the clamp positioning mechanism 200 is a tray-like structure for conveying and positioning the stator 500 , including the bottom plate 13 , the guide rails 14 symmetrically arranged at the bottom of the bottom plate 13 , and the sliding bearing 15 . The stator 500 slides on the horizontal guide rail 3 of the lower table supporting mechanism 300, and the base plate 13 is also provided with a positioning sleeve 16 for positioning the clamp positioning mechanism 200 at various positions.

Among them, the guide rail 14 and the sliding bearing 15 can cooperate with the horizontal guide rail 3 to make the bottom plate 13 move horizontally along the horizontal guide rail 3, that is, the clamp positioning mechanism 200 can move horizontally on the lower table supporting mechanism 300; In cooperation with the positioning sleeve 16, the horizontal positioning of the bottom plate 13 can be realized, so that the horizontal positions of the clamp positioning mechanism 200 and the sliding table supporting mechanism 300 can be kept relatively fixed.

When the guide rail 14 is matched with the horizontal guide rail 3, and the latch 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, that is, to limit the vertical direction of the clamp positioning mechanism 200. role of location.

As shown in Figures 3 and 4, a swing shaft drive assembly is also provided below the lower table 4. The swing shaft drive assembly includes a servo motor 2 5, a synchronous belt 6, a ball screw 7, a nut seat 8, and a push block 9. The servo motor The motor two 5 is connected with the synchronous belt 6 in a driving manner; the two ends of the ball screw 7 are fixed on the equipment base through the bearing seat, and one end of the ball screw 7 is drivingly connected with the synchronous belt 6; the nut seat 8 is arranged in the middle of the ball screw 7 , and is threaded with the ball screw 7; the push block 9 is fixedly connected with the nut seat 8; the servo motor 25 can drive the synchronous belt 6 to rotate, and the synchronous belt 6 drives the ball screw 7 to rotate, thereby driving the nut seat 8 and the push block 9 to move around.

As shown in Figures 3 and 4, there are guide slider mechanisms on the rear mounting surface of the sliding table 4, the vertical guide rail 12 is fixed on the equipment base, and the lower part of the sliding table 4 is simultaneously connected with two sets of balance cylinders 10 and a servo drive mechanism 11. Both the balance cylinder 10 and the servo drive mechanism 11 are fixed on the equipment base, and the balance cylinder 10 and the servo drive mechanism 11 drive the lower table 4 to move, that is, the servo drive mechanism 11 controls the lower table support mechanism 300 to move along the vertical guide rail 12 as a whole. Up and down movement, wherein, the servo drive mechanism 11 adopts a drive structure of a servo motor and a ball screw, which can precisely control the distance of the up and down movement of the flaring mechanism 100 .

Specifically, as shown in FIG. 5 and FIG. 6 , the clamp positioning mechanism 200 further includes an upper latch assembly 18 and a lower latch assembly 17 , the upper latch assembly 18 is fixed on the upper side of the bottom plate 13 through the clamp upper plate 19 and the connecting column 20 , and the lower latch The assembly 17 is fixed to the underside of the base plate 13 .

As shown in FIGS. 5 to 8 , the structure of the upper pin assembly 18 and the lower pin assembly 17 is similar to that of the flared assembly 26 , both of which are radial expansion and contraction structures capable of simultaneously expanding and contracting a plurality of sliding sheets in the radial direction of the circle. , the upper latch assembly 18 includes an upper sliding latch plate, an upper rotating plate 22, and a number of limit pin pieces 29;

Among them, the upper sliding bolt plate and the lower sliding bolt plate are similar in structure to the bolt plate 33, the upper rotating plate 22 and the lower rotating plate 23 are similar in structure to the rotating plate 32, and the flared pins 28 and the limit pins 29 are similar in structure, The upper rotating plate 22 and the lower rotating plate 23 also have protrusions on one side, and the protrusions on the upper rotating plate 22 and the lower rotating plate 23 are connected together by the swing shaft 24 respectively, so that they can rotate simultaneously.

At the same time, the position of the swing shaft 24 of the fixture positioning mechanism 200 corresponds to the position of the push block 9 on the lower table support mechanism 300. The operation of the servo motor 25 can drive the swing shaft 24 to move, and the swing shaft 24 drives the upper rotating plate 22. And the lower rotating plate 23 rotates.

When the stator 500 is placed in the fixture positioning mechanism 200, the push block 9 of the swing shaft drive assembly on the lower table support mechanism 300 drives the swing shaft 24 to rotate, thereby driving the upper rotating plate 22 and the lower rotating plate 23 to rotate at the same time, and the upper rotating plate 22 The rotation of the upper rotating plate 22 can drive several limit pins 29 to perform radial contraction motion in the upper sliding latch plate, and the rotation of the lower rotating plate 23 can drive several limit pins 29 to perform radial contraction motion in the lower sliding latch plate.

As shown in FIG. 15 , a plurality of limit pins 29 arranged in a circular array on the upper pin assembly 18 and the lower pin assembly 17 move inward to divide the circumferentially adjacent flat wires 510 in the stator 500 , and perform the circumferential direction adjustment on the middle of the flat wires. Positioning, so that the middle of the flat wire 510 remains relatively stable during the process of flaring and twisting, so that the position of the flat wire 510 after flaring and twisting is more accurate, and at the same time, it is used to protect the insulating paper from damage during the twisting process.

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

First, the feeding servo (not shown) of the previous process moves the fixture positioning mechanism 200 with the stator 500 along the horizontal guide rail 3 to the to-be-twisted position, the pin positioning assembly 1 is extended, the positioning sleeve 16 is inserted, and the pressing assembly 2 Extend the clamping fixture positioning mechanism 200 to make it stable on the lower table support mechanism 300, and the lower table support mechanism 300 moves up a certain distance as a whole, and moves to the mandrel to support the innermost flat wire 510 of the stator 500, and the flaring mechanism 100 is lowered to a certain distance, so that the flared pin 28 just covers the flat wire 510 waiting to be flared.

Then, the servo mechanism drives the upper pin assembly 18 and the lower pin assembly 17 on the clamp positioning mechanism 200 to operate, so that the plurality of limit pins 29 arranged in the annular array on the upper pin assembly 18 and the lower pin assembly 17 move inward, and are inserted into the circumferentially adjacent ones. Between the two rows of flat wires 510 , the flat wires are circumferentially positioned.

Then, the servo drive assembly 1 27 drives the rotating plate 32 in the flaring assembly 26 to rotate, so that the flaring pin 28 retracts to stretch the flat wire 510 outward, so that the flat wire 510 moves to the set position, the specific state As shown in FIG. 11 and FIG. 12 , after this action is completed, the flaring mechanism 100 rises and separates from the flat wire 510 , the flaring pin piece 28 is adjusted to the set position, and the flaring mechanism 100 is lowered again to cover the flat wire that needs to be expanded twice. For the wire 510, the flaring of all the flat wires 510 is completed according to this method.

Then, after the flaring work is completed, the lowering table support mechanism 300 moves down to the original position, the flaring mechanism 100 also moves down below the mandrel, the mandrel is removed, the twisting die is moved to the working position, and the flaring mechanism 100 is moved back up to the original position.

Then, the lower table support mechanism 300 moves up to the set position, the flaring mechanism moves down to push the innermost two layers of flat wires 510 against the ribs 34 of the inner mold 36, and the lower table support mechanism 300 moves up to make the innermost two layers of flat wires 510 close to the ribs 34 of the inner mold 36 The flat wire 510 is inserted into the torsion die groove 1 and the torsion die groove 2 of the torsion head mechanism 400, as shown in FIG. 13, then, the flaring pin 28 retracts, and the flaring mechanism 100 moves up to the original position to avoid the torsion mechanism and the twisting die groove 2. The flaring mechanism 100 interferes, and the sliding table supporting mechanism 300 continues to move up to the head-turning position.

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

Finally, switch the molds according to the above steps, switch to the second set of twisting dies, repeat the twisting process steps to complete the twisting process of the flat wire, switch the third set of twisting dies and the fourth set of twisting dies again, repeat the twisting process steps again, complete The twisting process of all flat wires.

Wherein, during the head twisting process, the lower table support mechanism 300 slowly moves up a certain distance following the twisting motion at a set speed to eliminate the length of the flat wire 510 lost in the axial direction of the stator during the head twisting process. After the twist is completed, the lower table support mechanism 300 Return to the original position so that the flat wire 510 exits the twisting die, the twisting assembly returns to the original position and automatically switches the next set of twisting dies to the working position, and repeats the above actions to complete the twisting of all layers of the flat wire 510 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (11)

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,

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

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.

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