Hairpin coil grabbing and inserting device and method of use

Abstract

A hairpin coil grabbing and inserting device and a using method, the device comprises an inner disc assembly and an outer ring assembly, the inner disc assembly is coaxially arranged inside the outer ring assembly, the inner disc assembly is provided with inner support blocks which are distributed at equal angles and can synchronously extend out of the outer peripheral wall, the outer ring assembly is provided with outer support blocks which are distributed at equal angles and can synchronously extend out of the inner peripheral wall, the inner support blocks and the outer support blocks are correspondingly arranged to form a braiding part clamping mechanism for clamping the inner and outer rings of the braiding part, the interval of the hairpin coil hairpin part can be adjusted by controlling the extension and retraction amount of the inner support blocks and the outer support blocks; further comprising a pressing ring arranged above the braiding part clamping mechanism, the pressing ring can apply a downward force to the braiding part of the hairpin coil by being pressed downward. The interval between the hairpin parts is adjusted by controlling the extension and retraction amount of the inner support blocks and the outer support blocks in the application, so that the interval of the hairpin parts matches the interval of the insertion slots on the stator group, thereby solving the problem that the insertion slots cannot be inserted due to the too wide or too narrow interval of the hairpin parts.

Description

Technical Field

[0001] This invention relates to the field of automation technology, and in particular to a hairpin-type coil gripping and insertion device and its usage method. Background Technology

[0002] With the rapid development of new energy vehicles, the demand for motors is also increasing, and the performance of the motor determines the performance of the new energy vehicle. Flat wire motors, with their lightweight, high efficiency, and low noise under high voltage, are favored by new energy vehicle manufacturers due to their advantages in terms of size. However, the manufacturing process of flat wire motors requires inserting shaped hairpin coils into slots in the stator assembly, a step with low automation, resulting in low current production capacity and limited application in the domestic new energy vehicle market.

[0003] Based on this, a Chinese invention patent proposes a device for gripping a hairpin coil and inserting it into a stator assembly (publication number: CN114598117 A), which includes an outer pressure sleeve and an inner expansion core. The inner side of the outer pressure sleeve slides in contact with the outer side of the outer clamping block, and the outer side of the inner expansion core slides in contact with the inner side of the inner clamping block. By driving the outer pressure sleeve and the inner expansion core to extend and retract, the outer clamping block and the inner clamping block are driven to extend and retract to form a hook structure that is inserted into the gap between adjacent hairpin parts on the hairpin coil, thereby realizing the gripping of the hairpin coil.

[0004] However, hairpin coil ( Figure 1 Due to factors such as processing precision, structural characteristics, and transportation compression, the actual parameters may occasionally deviate from the design parameters. Specifically, the spacing between the hairpin sections A on the hairpin coil may be too narrow or too wide. When this situation occurs during on-site assembly, the staff needs to make fine adjustments, specifically by tightening or widening the braided section B on the hairpin coil to adjust the spacing between the hairpin sections A so that it matches the slots on the stator assembly.

[0005] However, existing hairpin coil gripping and insertion devices cannot adjust the spacing of the hairpin section A on the hairpin coil. That is, when the above situation is encountered using existing technology, manual intervention is still required to fine-tune the hairpin section A on the hairpin coil in order to achieve insertion, which undoubtedly reduces production efficiency.

[0006] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a hairpin-type coil gripping and insertion device and its usage method to solve the above problems. Summary of the Invention

[0007] To overcome the shortcomings of the prior art, the present invention aims to provide a hairpin coil gripping and insertion device and its usage method. The device consists of an inner support block and an outer support block arranged in a corresponding manner to form a braid clamping mechanism for clamping the inner and outer rings of the braid. By controlling the extension and retraction of the inner and outer support blocks to adjust the spacing of the hairpin parts, the hairpin parts on the hairpin coil are aligned with the slots on the stator assembly, thereby solving the problem that the hairpin parts of the hairpin coil cannot be inserted into the slots on the stator assembly due to the spacing being too wide or too narrow.

[0008] To achieve the above and other related objectives, the technical solution provided by the present invention is: a hairpin coil gripping and insertion device, wherein the hairpin coil includes a hairpin portion and a braided portion, and the gripping and insertion device includes: An outer ring assembly has a rotating ring coaxially mounted inside. The outer ring assembly has multiple radially equidistant guide grooves for outer support blocks that communicate with the inner circumferential wall. The rotating ring has multiple circumferentially equidistant drive grooves for outer support blocks that correspond one-to-one with the guide grooves. An outer support block slides in the guide groove, and an outer support block drive post is formed on the outer support block. The drive post slides in the drive groove. Rotation of the rotating ring can cause the outer support block to synchronously extend and retract within the guide groove. An inner disc assembly has a rotating disk coaxially mounted inside. The inner disc assembly has multiple radially equidistant guide grooves for inner support blocks that communicate with the outer peripheral wall. The rotating disk has multiple circumferentially equidistant drive grooves for inner support blocks that correspond one-to-one with the guide grooves. Inner support blocks slide within the guide grooves, and inner support blocks have drive columns formed on them. These drive columns slide within the drive grooves. Rotation of the rotating disk causes the inner support blocks to extend and retract synchronously within the guide grooves. The inner disc assembly is located inside the outer ring assembly and is coaxially arranged with the outer ring assembly. The inner support block and the outer support block are correspondingly arranged to form a braiding part clamping mechanism. The braiding part clamping mechanism is used to clamp the inner and outer rings of the braiding part, and the spacing of the hair clip part is adjusted by the extension and retraction of the inner support block and the outer support block. An insertion mechanism is provided, comprising a telescopic cylinder and a pressure ring. The pressure ring is positioned directly above the braiding clamping mechanism, and the telescopic cylinder is used to drive the pressure ring to apply a downward force to the braiding.

[0009] A preferred technical solution is as follows: a plurality of windows communicating with the interior of the outer ring assembly are formed on the outer peripheral wall of the outer ring assembly, and a plurality of ears corresponding to the windows are formed on the outer periphery of the rotating ring. The ears extend out of the outer peripheral wall of the outer ring assembly through the windows and can be used to drive the rotating ring to rotate.

[0010] A preferred technical solution is as follows: it further includes a rotating ring drive mechanism, which includes a rotating ring drive motor, a transmission frame, and transmission rods. The rotating ring drive motor is used to drive the transmission frame to rotate. The transmission frame is connected to the ear in a one-to-one transmission manner through multiple transmission rods to drive the rotating ring to rotate.

[0011] A preferred technical solution is as follows: a shaft hole communicating with the interior of the inner disk assembly is formed at the middle position of the top side of the inner disk assembly; a groove corresponding to the shaft hole is provided at the center of the rotating disk; a transition ring fixedly connected to the rotating disk is embedded in the groove; a bearing is provided in the transition ring; the inner ring of the bearing is fixedly connected to the inner disk assembly; and the outer ring of the bearing is fixedly connected to the transition ring.

[0012] A preferred technical solution is as follows: it further includes a rotary disk drive mechanism, which includes a rotary disk drive motor and a transmission shaft. The rotary disk drive motor is used to drive the transmission shaft to rotate. The transmission shaft passes through the shaft hole and is connected to the adapter ring to drive the rotary disk to rotate.

[0013] A preferred technical solution is as follows: the outer ring assembly consists of a first outer ring and a second outer ring. The first outer ring and the second outer ring are arranged vertically opposite each other and parallel to each other. The bottom side of the first outer ring is provided with multiple first outer support block guide grooves that are radially distributed at equal angles and communicate with the inner peripheral wall. The top side of the second outer ring is provided with multiple second outer support block guide grooves that are radially distributed at equal angles and communicate with the inner peripheral wall. The first outer support block guide grooves and the second outer support block guide grooves are arranged alternately to form the outer support block guide grooves.

[0014] The preferred technical solution is as follows: the inner disk assembly is composed of a first inner disk and a second inner disk. The first inner disk and the second inner disk are arranged vertically opposite each other and at intervals. The bottom side of the first inner disk is provided with multiple first inner support block guide grooves that are radially distributed at equal angles and communicate with the outer peripheral wall. The top side of the second inner disk is provided with multiple second inner support block guide grooves that are radially distributed at equal angles and communicate with the outer peripheral wall. The first inner support block guide grooves and the second inner support block guide grooves are arranged alternately to form the inner support block guide grooves.

[0015] A preferred technical solution is as follows: the insertion mechanism further includes a pressure ring mounting plate, the telescopic cylinder is located above the pressure ring mounting plate and drives the pressure ring mounting plate to rise and fall, the pressure ring is fixed to the bottom side of the pressure ring mounting plate and is correspondingly arranged with the braiding clamping mechanism.

[0016] A preferred technical solution is that the bottom side of the pressure ring has a ring groove structure that matches the braided part.

[0017] A method of using the above-mentioned hairpin coil gripping and insertion device includes the following steps: Step 1: Move the gripping and inserting device directly above the hairpin coil, lower the gripping and inserting device, insert the braided part on the hairpin coil between the inner disc assembly and the outer ring assembly, and clamp the braided part by the braided part clamping mechanism; Step 2: Compare the spacing between adjacent hairpin sections on the hairpin coil with the spacing between adjacent slots on the stator assembly, and control the inner and outer support blocks of the braiding clamping mechanism to extend and retract to adjust the spacing between adjacent hairpin sections on the hairpin coil so that the spacing between adjacent hairpin sections on the hairpin coil is consistent with the spacing between adjacent slots on the stator assembly. Step 3: Move the gripping and inserting device to insert the hairpin part of the hairpin coil into the slot on the stator assembly one by one; Step 4: The braiding clamping mechanism releases the braiding part, and the pressure ring presses down to apply a downward force to the braiding part of the hairpin coil until the braiding part on the hairpin coil is fully inserted into the slot on the stator assembly.

[0018] Due to the application of the above technical solution, the beneficial effects of this invention are as follows: This invention proposes a hairpin coil gripping and insertion device and its method of use. The device comprises an inner support block and an outer support block, which are correspondingly arranged to form a braid clamping mechanism for holding the inner and outer coils of the braided section. On one hand, the inner and outer support blocks enable the gripping of the hairpin coil; on the other hand, by controlling the extension and retraction of the inner and outer support blocks, the distance between the hairpin sections can be adjusted, ensuring that the hairpin sections on the hairpin coil correspond to the slots on the stator assembly. This solves the problem of the hairpin coil being unable to insert into the slots on the stator assembly due to its excessive width or narrowness during on-site assembly.

[0019] The present invention proposes a hairpin-type coil gripping and insertion device and its usage method, in which both the inner support block and the outer support block are driven by a motor. Compared with the prior art that uses a cylinder to drive the inner and outer clamping blocks, the motor has the advantages of high precision, good stability and low noise. Attached Figure Description

[0020] Figure 1This is a three-dimensional structural diagram of the hairpin coil involved in the present invention.

[0021] Figure 2 This is a three-dimensional structural diagram of the hairpin-type coil gripping and inserting device of the present invention from one perspective.

[0022] Figure 3 This is a three-dimensional structural diagram of the hairpin-type coil gripping and insertion device of the present invention from another perspective.

[0023] Figure 4 This is an exploded view of the outer ring assembly, rotating ring, and outer support block in the hairpin coil gripping and inserting device of the present invention from one perspective.

[0024] Figure 5 This is an exploded view from another perspective of the outer ring assembly, rotating ring, and outer support block in the hairpin coil gripping and inserting device of the present invention.

[0025] Figure 6 This is a top view of the second outer ring in the hairpin-type coil gripping and inserting device of the present invention.

[0026] Figure 7 This is a top view of the rotating ring in the hairpin coil gripping and inserting device of the present invention.

[0027] Figure 8 This is a three-dimensional structural diagram of the outer support block in the hairpin coil gripping and inserting device of the present invention.

[0028] Figure 9 This is an exploded view of the inner disc assembly, rotating disk, and inner support block in the hairpin coil gripping and inserting device of the present invention from one perspective.

[0029] Figure 10 This is an exploded view from another perspective of the inner disc assembly, rotating disk, and inner support block in the hairpin coil gripping and inserting device of the present invention.

[0030] Figure 11 This is a top view of the second inner disk in the hairpin coil gripping and inserting device of the present invention.

[0031] Figure 12 This is a top view of the rotating disk in the hairpin coil gripping and inserting device of the present invention.

[0032] Figure 13 This is a three-dimensional structural diagram of the inner support block in the hairpin coil gripping and inserting device of the present invention. Implementation

[0033] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0034] Please see Figures 1-13 It should be noted that in the description of this invention, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0036] like Figure 1 The diagram shows a three-dimensional structure of the hairpin coil according to the present invention. The hairpin coil includes a hairpin portion A and a braided portion B. During assembly, the hairpin portions A on the hairpin coil must be inserted one-to-one into the slots on the stator assembly. Due to the influence of its braided structure and material properties, the hairpin coil is prone to problems such as excessively narrow or wide spacing between adjacent hairpin portions A. If the spacing between adjacent hairpin portions A exceeds a certain range, it is difficult to insert them into the slots on the stator assembly. Similarly, due to its braided structure, the operator can indirectly adjust the spacing between adjacent hairpin portions A by opening or closing the braided portion B.

[0037] like Figure 2 , Figure 3 , Figure 4 and Figure 9As shown in this embodiment, a hairpin coil gripping and insertion device is proposed, including a braided part clamping mechanism and an insertion mechanism. The braided part clamping mechanism includes an inner support block 15 in the inner disc assembly 1 and an outer support block 10 in the outer ring assembly 2. The braided part clamping mechanism is used to clamp the inner and outer rings of the braided part B, and the spacing between adjacent hairpin parts A on the hairpin coil is adjusted by the extension and retraction of the inner support block 15 and the outer support block 10. The insertion mechanism includes a telescopic cylinder 20 and a pressure ring 21. The pressure ring 21 is located directly above the braided part clamping mechanism and is driven to rise and fall by the telescopic cylinder 20. The insertion mechanism is used to apply a downward force to the braided part B so that the hairpin part A is fully inserted into the slot on the stator assembly.

[0038] Specifically, the outer ring assembly 2 is fixed to the bottom side of the outer ring fixing flange 5 by multiple vertically arranged guide posts 4; the inner disc assembly 1 is fixed to the bottom side of the inner disc fixing flange 7 by multiple vertically arranged lower connecting rods 6, the inner disc fixing flange 7 is located on the bottom side of the outer ring fixing flange 5 and is fixedly connected to the outer ring fixing flange 5 by multiple vertically arranged upper connecting rods 8; the pressure plate 3 is fixedly connected to the guide sleeve sleeved on the guide posts 4 and can move up and down between the outer ring fixing flange 5 and the outer ring assembly 2, and the pressure plate 3 is provided with a through hole for the inner disc fixing flange 7 to pass through.

[0039] like Figures 4-8 As shown, the outer ring assembly 2 consists of a first outer ring 201 and a second outer ring 202. The first outer ring 201 and the second outer ring 202 are arranged vertically opposite each other and parallel to each other at intervals. The rotating ring 9 is coaxially mounted between the first outer ring 201 and the second outer ring 202. The bottom side of the first outer ring 201 is provided with multiple first outer support block guide grooves 2011 that are radially distributed at equal angles and communicate with the inner peripheral wall. The top side of the second outer ring 202 is provided with multiple second outer support block guide grooves 2021 that are radially distributed at equal angles and communicate with the inner peripheral wall. The first outer support block guide grooves 2011 and the second outer support block guide grooves 2021 are arranged alternately to form the outer support block guide grooves. The top side of the rotating ring 9 is provided with multiple first outer support block drive grooves 901, which are distributed at equal angles along the circumference and correspond one-to-one with the first outer support block guide grooves 2011. The bottom side of the rotating ring 9 is provided with multiple second outer support block drive grooves 902, which are distributed at equal angles along the circumference and correspond one-to-one with the second outer support block guide grooves 2021. The first outer support block drive grooves 901 and the second outer support block drive grooves 902 constitute the outer support block drive grooves. An outer support block 10 is slidably disposed in the outer support block guide groove. An outer support block drive post 1001 is formed on the outer support block 10. The outer support block drive post 1001 is slidably disposed in the corresponding outer support block drive groove. The rotating ring 9 rotates and drives the outer support block drive groove to rotate, thereby driving the outer support block 10 to extend and retract synchronously in the outer support block guide groove.

[0040] The outer support block guide groove guides the outer support block 10, ensuring it is evenly supported on the outer ring of the braided section B on the hairpin coil, thus ensuring uniform force distribution on the outer ring of the braided section B. The first outer support block guide groove 2011 and the second outer support block guide groove 2021 are arranged in two staggered layers, further improving the uniformity of force application by the outer support block 10 on the outer ring of the braided section B. The outer support block drive sloping groove drives the outer support block 10; rotation of the rotating ring 9 drives the outer support block drive sloping groove to rotate, thereby driving the outer support block 10 to synchronously extend and retract within the outer support block guide groove.

[0041] Multiple windows communicating with the interior of the outer ring assembly are formed on the outer peripheral wall of the outer ring assembly 2. Multiple ears 903, each corresponding to a window, are formed on the outer periphery of the rotating ring 9. The ears 903 extend through the windows from the outer peripheral wall of the outer ring assembly 2 and can be used to drive the rotating ring 9 to rotate. A rotating ring drive mechanism is also included, comprising a rotating ring drive motor 11, a transmission frame 12, and transmission rods 13. The rotating ring drive motor 11 is fixed to the outer ring fixing flange 5 and drives the transmission frame 12 to rotate. The transmission frame 12 is connected to the ears 93 one-to-one via multiple transmission rods 13 to drive the rotating ring 9 to rotate.

[0042] like Figures 9-13 As shown, the inner disk assembly 1 consists of a first inner disk 101 and a second inner disk 102. The first inner disk 101 and the second inner disk 102 are arranged vertically opposite each other and parallel to each other. The rotating disk 14 is coaxially mounted between the first inner disk 101 and the second inner disk 102. The bottom side of the first inner disk 101 is provided with multiple first inner support block guide grooves 1011 that are radially distributed at equal angles and communicate with the outer peripheral wall. The top side of the second inner disk 102 is provided with multiple second inner support block guide grooves 1021 that are radially distributed at equal angles and communicate with the outer peripheral wall. The first inner support block guide grooves 1011 and the second inner support block guide grooves 1021 are arranged alternately to form the inner support block guide grooves. The top side of the rotating disk 14 is provided with multiple first inner support block drive grooves 1401, which are distributed at equal angles along the circumference and correspond one-to-one with the first inner support block guide grooves 1011. The bottom side of the rotating disk 14 is provided with multiple second inner support block drive grooves 1042, which are distributed at equal angles along the circumference and correspond one-to-one with the second inner support block guide grooves 1021. The first inner support block drive grooves 1041 and the second inner support block drive grooves 1042 constitute the inner support block drive groove. An inner support block 15 is slidably disposed in the inner support block guide groove. An inner support block drive post 1501 is formed on the inner support block 15. The inner support block drive post 1501 is slidably disposed in the corresponding inner support block drive groove. The rotation of the rotating disk 14 can drive the inner support block drive groove to rotate, thereby driving the inner support block 15 to extend and retract synchronously in the inner support block guide groove.

[0043] The inner support block guide groove guides the inner support block 15, ensuring it is evenly supported on the inner loop of the braided section B on the hairpin coil, thus ensuring uniform force distribution on the inner loop. The first inner support block guide groove 1011 and the second inner support block guide groove 1021 are arranged in two alternating layers to further improve the uniformity of force application by the inner support block 15 on the inner loop of the braided section B. The inner support block drive sloping groove drives the inner support block 15; rotation of the rotating disk 14 drives the inner support block drive sloping groove to rotate, thereby driving the inner support block 15 to synchronously extend and retract within the outer support block guide groove.

[0044] It should also be noted that the first inner disk 101 and the second inner disk 102 are fixedly connected by a connecting post 103, and the rotating disk 14 is provided with a slot 1403 for the connecting post to pass through and for avoidance.

[0045] A shaft hole communicating with the interior of the inner disk assembly 1 is formed at the center of the top side. A groove 1404 corresponding to the shaft hole is provided at the center of the rotating disk 14. A transition ring 16, fixedly connected to the rotating disk 14, is embedded in the groove 1404. A bearing 17 is provided in the transition ring 16. The inner ring of the bearing 17 is fixedly connected to the inner disk assembly 1, and the outer ring of the bearing 17 is fixedly connected to the transition ring 16. A rotating disk drive mechanism is also included, comprising a rotating disk drive motor 18 and a transmission shaft 19. The rotating disk drive motor 18 is fixed to the inner disk fixing flange 7 and is used to drive the transmission shaft 19 to rotate. The transmission shaft 19 passes through the shaft hole and is connected to the transition ring 16 to drive the rotating disk 14 to rotate.

[0046] The inner support block 15 and the outer support block 10 are respectively provided to form a braid clamping mechanism for clamping the inner and outer rings of the braided part B on the hairpin coil. By controlling the rotation angle of the rotating disk 14 and the rotating ring 9, the extension and retraction of the inner support block 15 and the outer support block 10 can be precisely controlled, thereby opening or closing the braided part B on the hairpin coil to indirectly adjust the spacing between the hairpin parts A on the hairpin coil.

[0047] In addition, it includes a pressure ring mounting plate 3; multiple telescopic cylinders 20 are provided, each fixed to multiple guide posts 4 via corresponding mounting seats, and the multiple telescopic cylinders extend and retract synchronously to drive the pressure ring mounting plate 3 to rise and fall. A pressure ring 21 is fixed to the bottom side of the pressure ring mounting plate 3, and the bottom side of the pressure ring 21 has an annular groove structure that matches the braided part B. The annular groove structure can play a certain limiting role, preventing the braided part B from deforming during insertion. It should be noted that, to avoid interference between the pressure ring mounting plate 3 and the rotating disk drive mechanism, the pressure ring mounting plate 3 is provided with clearance through holes.

[0048] It also includes a vision inspection module, which measures the actual spacing between the hairpin sections A on the hairpin coil. The control system compares the actual spacing with the calibrated spacing of the slots on the stator assembly, and then controls the rotation angle of the rotating ring drive motor 11 to control the degree to which the outer support block 10 retracts inward, and controls the rotation angle of the rotating disk drive motor 18 to control the degree to which the inner support block 15 expands outward. The inner support block 15 and the outer support block 10 cooperate to fine-tune (retract or expand) the braided section B on the hairpin coil, thereby adjusting the spacing of the hairpin sections A on the hairpin coil, so that the hairpin sections A match the slots on the stator assembly, improving insertion stability and assembly efficiency.

[0049] This application also relates to a method of using the above-mentioned hairpin coil gripping and insertion device, including the following steps: Step 1: Move the gripping and inserting device directly above the hairpin coil, lower the gripping and inserting device, insert the braided part on the hairpin coil between the inner disc assembly and the outer ring assembly, and clamp the braided part by the braided part clamping mechanism; Step 2: Compare the spacing between adjacent hairpin sections on the hairpin coil with the spacing between adjacent slots on the stator assembly, and control the extension and retraction of the inner and outer support blocks of the braiding clamping mechanism to adjust the spacing between adjacent hairpin sections on the hairpin coil so that the spacing between adjacent hairpin sections on the hairpin coil is consistent with the spacing between adjacent slots on the stator assembly. Step 3: Move the gripping and inserting device to insert the hairpin part of the hairpin coil into the slot on the stator assembly one by one; Step 4: The braiding clamping mechanism releases the braiding part, and the pressure ring presses down to apply a downward force to the braiding part of the hairpin coil until the braiding part on the hairpin coil is fully inserted into the slot on the stator assembly.

[0050] It should be noted that in step 2, the inner support block 15 in the inner disc assembly 1 and the outer support block 10 in the outer ring assembly 2 are controlled to move synchronously based on the comparison between the actual distance and the calibrated distance. This is to ensure that the inner support block 15 squeezes the inner ring of the braided part B, and the outer support block 10 squeezes the outer ring of the braided part B. Specifically, if the actual distance between adjacent hairpin parts A is measured to be large, the extension of the outer support block 10 is controlled to be larger, and the extension of the inner support block 15 is controlled to be smaller, so as to close the braided part B and reduce the distance between adjacent hairpin parts A, so that the hairpin parts A match the slots on the stator assembly. If the actual distance between adjacent hairpin parts A is measured to be small, the extension of the outer support block 10 is controlled to be smaller, and the extension of the inner support block 15 is controlled to be larger, so as to open the braided part B and expand the distance between adjacent hairpin parts A, so that the hairpin parts A match the slots on the stator assembly.

[0051] Therefore, the present invention has the following advantages: 1. This invention proposes a hairpin coil gripping and insertion device and its method of use, which uses inner and outer support blocks to form a braid clamping mechanism for clamping the inner and outer coils of the braided section. On one hand, the inner and outer support blocks can clamp the hairpin coil; on the other hand, by controlling the extension and retraction of the inner and outer support blocks, the distance between the hairpin sections can be adjusted so that the hairpin section on the hairpin coil corresponds to the slot on the stator assembly, thereby solving the problem that the hairpin section on the hairpin coil cannot be inserted into the slot on the stator assembly due to being too wide or too narrow during on-site assembly.

[0052] 2. The hairpin coil gripping and insertion device and its usage method proposed in this invention are both driven by motors for the inner support block and the outer support block. Compared with the prior art which uses cylinders to drive the inner and outer clamping blocks, motors have the advantages of high precision, good stability and low noise.

[0053] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A hairpin-type coil gripping and insertion device, wherein the hairpin coil includes a hairpin portion and a braided portion, characterized in that, The gripping and inserting device includes: An outer ring assembly has a rotating ring coaxially mounted inside. The outer ring assembly has multiple radially equidistant guide grooves for outer support blocks that communicate with the inner circumferential wall. The rotating ring has multiple circumferentially equidistant drive grooves for outer support blocks that correspond one-to-one with the guide grooves. An outer support block slides in the guide groove, and an outer support block drive post is formed on the outer support block. The drive post slides in the drive groove. Rotation of the rotating ring can cause the outer support block to synchronously extend and retract within the guide groove. An inner disc assembly has a rotating disk coaxially mounted inside. The inner disc assembly has multiple radially equidistant guide grooves for inner support blocks that communicate with the outer peripheral wall. The rotating disk has multiple circumferentially equidistant drive grooves for inner support blocks that correspond one-to-one with the guide grooves. Inner support blocks slide within the guide grooves, and inner support blocks have drive columns formed on them. These drive columns slide within the drive grooves. Rotation of the rotating disk causes the inner support blocks to extend and retract synchronously within the guide grooves. The inner disc assembly is located inside the outer ring assembly and is coaxially arranged with the outer ring assembly. The inner support block and the outer support block are correspondingly arranged to form a braiding part clamping mechanism. The braiding part clamping mechanism is used to clamp the inner and outer rings of the braiding part, and the spacing of the hair clip part is adjusted by the extension and retraction of the inner support block and the outer support block. An insertion mechanism is provided, comprising a telescopic cylinder and a pressure ring. The pressure ring is positioned directly above the braiding clamping mechanism, and the telescopic cylinder is used to drive the pressure ring to apply a downward force to the braiding.

2. The hairpin-type coil gripping and insertion device according to claim 1, characterized in that: The outer ring assembly has multiple windows connected to the interior of the outer ring assembly on its outer peripheral wall. The rotating ring has multiple ears that correspond one-to-one with the windows on its outer periphery. The ears extend out of the outer peripheral wall of the outer ring assembly through the windows and can be used to drive the rotating ring to rotate.

3. The hairpin-type coil gripping and insertion device according to claim 2, characterized in that: It also includes a rotating ring drive mechanism, which includes a rotating ring drive motor, a transmission frame, and transmission rods. The rotating ring drive motor is used to drive the transmission frame to rotate. The transmission frame is connected to the ear in a one-to-one transmission manner through multiple transmission rods to drive the rotating ring to rotate.

4. The hairpin-type coil gripping and insertion device according to claim 1, characterized in that: The inner disk assembly has a shaft hole at the top center that connects to the interior of the inner disk assembly. The rotating disk has a groove at its center that corresponds to the shaft hole. A transition ring that is fixedly connected to the rotating disk is embedded in the groove. A bearing is provided in the transition ring. The inner ring of the bearing is fixedly connected to the inner disk assembly, and the outer ring of the bearing is fixedly connected to the transition ring.

5. The hairpin-type coil gripping and insertion device according to claim 4, characterized in that: It also includes a rotary disk drive mechanism, which includes a rotary disk drive motor and a transmission shaft. The rotary disk drive motor is used to drive the transmission shaft to rotate. The transmission shaft passes through the shaft hole and is connected to the adapter ring to drive the rotary disk to rotate.

6. The hairpin-type coil gripping and insertion device according to claim 1, characterized in that: The outer ring assembly consists of a first outer ring and a second outer ring. The first outer ring and the second outer ring are arranged vertically opposite each other and at intervals. The bottom side of the first outer ring is provided with multiple first outer support block guide grooves that are radially distributed at equal angles and communicate with the inner peripheral wall. The top side of the second outer ring is provided with multiple second outer support block guide grooves that are radially distributed at equal angles and communicate with the inner peripheral wall. The first outer support block guide grooves and the second outer support block guide grooves are arranged alternately to form the outer support block guide grooves.

7. The hairpin-type coil gripping and insertion device according to claim 1, characterized in that: The inner disk assembly consists of a first inner disk and a second inner disk. The first inner disk and the second inner disk are arranged vertically opposite each other and at intervals. The bottom side of the first inner disk is provided with multiple first inner support block guide grooves that are radially distributed at equal angles and communicate with the outer peripheral wall. The top side of the second inner disk is provided with multiple second inner support block guide grooves that are radially distributed at equal angles and communicate with the outer peripheral wall. The first inner support block guide grooves and the second inner support block guide grooves are arranged alternately to form the inner support block guide grooves.

8. The hairpin-type coil gripping and insertion device according to claim 1, characterized in that: The insertion mechanism also includes a pressure ring mounting plate. The telescopic cylinder is located above the pressure ring mounting plate and drives the pressure ring mounting plate to rise and fall. The pressure ring is fixed to the bottom side of the pressure ring mounting plate and is correspondingly arranged with the braiding clamping mechanism.

9. A hairpin-type coil gripping and insertion device according to claim 1, characterized in that: The bottom side of the pressure ring has a ring groove structure that matches the braided part.

10. A method of using the hairpin-type coil gripping and insertion device according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Move the gripping and inserting device directly above the hairpin coil, lower the gripping and inserting device, insert the braided part on the hairpin coil between the inner disc assembly and the outer ring assembly, and clamp the braided part by the braided part clamping mechanism; Step 2: Compare the spacing between adjacent hairpin sections on the hairpin coil with the spacing between adjacent slots on the stator assembly, and control the inner and outer support blocks of the braiding clamping mechanism to extend and retract to adjust the spacing between adjacent hairpin sections on the hairpin coil so that the spacing between adjacent hairpin sections on the hairpin coil is consistent with the spacing between adjacent slots on the stator assembly. Step 3: Move the gripping and inserting device to insert the hairpin part of the hairpin coil into the slot on the stator assembly one by one; Step 4: The braiding clamping mechanism releases the braiding part, and the pressure ring presses down to apply a downward force to the braiding part of the hairpin coil until the braiding part on the hairpin coil is fully inserted into the slot on the stator assembly.

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