A motor stator core lamination device

Abstract

The application relates to the technical field of motor stator core lamination, and particularly provides a motor stator core lamination device, which comprises a rack, a workbench arranged on the rack, a positioning disc arranged on the workbench and used for bearing and positioning silicon steel sheets, and a voltage division ring arranged between adjacent N silicon steel sheets, wherein the end surface of the voltage division ring is provided with an elastic inclined surface. Through the arrangement of the voltage division ring, the layered synchronous lamination of multiple groups of silicon steel sheets can be realized, and the lamination operation frequency is reduced. Meanwhile, the thicker part of the voltage division ring is first in contact with the end surface of the silicon steel sheet and bears force, then the contact area is gradually increased until complete adhesion, so that the adjacent silicon steel sheets are gradually adhered from the outer ring to the inner ring, the hollow bubble in the middle position of the lamination surface is effectively prevented, and the close contact between the silicon steel sheets is ensured.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle motor stator core stacking technology, and in particular to a motor stator core stacking device. Background Technology

[0002] As a core component of new energy vehicles, the electric motor's technological development directly impacts vehicle performance, energy efficiency, and cost. The power supply provides electrical energy to the electric motor, which converts this electrical energy into mechanical energy, driving the wheels and working devices via a transmission or directly. The stator core lamination is a crucial process in motor manufacturing. Traditionally, stators are made by laminating stamped silicon steel sheets to reduce eddy current losses and improve permeability. Early lamination processes used riveting or welding for fixation, but these methods easily led to core deformation or insulation damage. With technological advancements, self-adhesive coated silicon steel sheets and laser welding technology have been gradually applied, improving lamination precision and mechanical strength.

[0003] Currently, high-precision motors typically employ a segmented stacking method, which involves first stacking a small number of silicon steel sheets into a single layer, followed by stacking multiple layers into a whole. This method allows for precise positioning of the initial small number of stacked sheets, effectively reducing the cumulative error of subsequent stacks, improving magnetic circuit distribution, reducing core eddy current losses and noise, and avoiding uneven stress or damage to the silicon steel sheet insulation layer caused by a single overall stacking. It also facilitates segmented assembly and quality control in automated production.

[0004] However, existing segmented lamination equipment typically laminates each segment separately, and then assembles and laminates multiple segments again, requiring multiple lamination operations, which wastes time. Furthermore, when laminating the lamination surfaces simultaneously, it is easy to form air bubbles in the middle of the lamination surfaces, leading to problems such as poor contact and damage to the insulation layer of the silicon steel sheet. Summary of the Invention

[0005] Therefore, it is necessary to provide a motor stator core stacking device to address the problems of low stacking efficiency and the tendency for air bubbles to form on the stacking surface in current segmented stacking equipment.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A motor stator core stacking device, comprising:

[0008] A frame, on which a worktable is provided, and a positioning plate is provided above the worktable. The positioning plate is used to support and position silicon steel sheets, and multiple silicon steel sheets are stacked on each other to form a stator core.

[0009] A press assembly for pressing multiple silicon steel sheets on the positioning plate to make the multiple silicon steel sheets fit together;

[0010] The pressure dividing ring is located between N adjacent silicon steel sheets, where N is a positive integer. Both the upper and lower end faces of the pressure dividing ring are elastic inclined surfaces, and the thickness of the pressure dividing ring gradually increases radially from the inner diameter to the outer diameter.

[0011] Furthermore, the pressure dividing ring includes an inner hard ring and two outer elastic rings. The outer periphery of both the upper and lower end faces of the inner hard ring is sealed to the outer elastic ring. A cavity is formed between the inner hard ring and the outer elastic ring, and the cavity is filled with hydraulic oil. The vertical distance between the outer elastic ring and the inner hard ring gradually increases radially from the inner diameter to the outer diameter. Planar spiral grooves are formed on both the upper and lower end faces of the inner hard ring.

[0012] Furthermore, two handles are fixedly provided on the outer periphery of the inner hard ring.

[0013] Furthermore, the positioning disk is provided with three positioning rods that slide radially thereon. The three positioning rods are evenly distributed around the circumference of the positioning disk. The diameter of the pressure dividing ring is the same as the diameter of the silicon steel sheet. The three positioning rods are located on the outer periphery of the pressure dividing ring and the silicon steel sheet.

[0014] Furthermore, a positioning ring frame is fixedly installed on the workbench, and three sliding plates are radially slidably installed on the positioning ring frame. The three sliding plates are evenly distributed around the circumference of the positioning ring frame, and the three sliding plates are fixedly connected to three positioning rods respectively. A vertically arranged telescopic cylinder is fixedly installed on one of the three sliding plates, and the telescopic end of the telescopic cylinder is coaxial with and fixedly connected to one of the three positioning rods.

[0015] Furthermore, the worktable is equipped with a drive assembly that can drive three positioning rods to move synchronously radially.

[0016] Furthermore, the drive assembly includes a hydraulic ring and a rotating ring. The hydraulic ring is fixedly mounted on the worktable, and the rotating ring is rotatably connected to the hydraulic ring. The end face of the rotating ring has three inclined grooves, which are evenly distributed along the circumference of the rotating ring. A slider that slides radially along the hydraulic ring is provided on the worktable. One end of the slider is slidably mounted in the inclined groove, and the slider is connected to a positioning rod.

[0017] Furthermore, a rotating sleeve is rotatably disposed inside the hydraulic ring, and multiple inclined strips are fixedly disposed on the side wall of the rotating sleeve. The multiple inclined strips are all inclined in the vertical direction. The top end of the rotating sleeve engages with the rotating ring. A sliding ring is axially slidably disposed inside the hydraulic ring, and a connecting inclined block is disposed on the inner circumference of the sliding ring. The connecting inclined block is inclined in the same direction as the inclined strips. The connecting inclined block is located between two adjacent inclined strips. A sealed cavity is formed between the sliding ring and the hydraulic ring, and the sealed cavity is filled with hydraulic oil.

[0018] Furthermore, the hydraulic ring has an oil inlet on its outer periphery, and the oil inlet communicates with the sealed cavity.

[0019] Furthermore, the press assembly includes a hydraulic cylinder and a top plate. The hydraulic cylinder is fixedly mounted on the frame and arranged vertically. The telescopic end of the hydraulic cylinder is connected to the top plate.

[0020] The beneficial effects of this invention are:

[0021] This invention enables the synchronous stacking of multiple sets of silicon steel sheets by setting a pressure dividing ring, reducing the number of stacking operations. Compared with the traditional segmented stacking equipment that stacks each sheet individually multiple times before assembling, this invention significantly saves time and improves processing efficiency.

[0022] This invention utilizes an elastic inclined surface on the end face of the pressure dividing ring, causing the thickness of the pressure dividing ring to gradually increase radially from the inner diameter to the outer diameter. During the stacking process, the thicker part of the pressure dividing ring first contacts and is stressed with the end face of the silicon steel sheet, and then the contact area gradually increases until it is completely bonded. This allows adjacent silicon steel sheets to gradually bond from the outer ring to the inner ring, effectively preventing the formation of air bubbles in the middle of the stacking surface and ensuring tight contact between the silicon steel sheets. At the same time, since the silicon steel sheets are not stressed simultaneously during stacking but bonded gradually, damage to the insulation layer of the silicon steel sheets caused by uneven stress at any moment is reduced, which is beneficial to maintaining the insulation performance of the silicon steel sheets.

[0023] This invention features an elastic inclined surface on the end face of the pressure dividing ring, with the thickness of the elastic inclined surface gradually increasing radially from the inner diameter to the outer diameter. When the press assembly no longer applies pressure, the elastic inclined surface of the pressure dividing ring gradually detaches from the end face of the silicon steel sheet under the action of restoring deformation, from the thinner part to the thicker part. This avoids the situation where the pressure dividing ring is too tightly attached to the silicon steel sheet and is difficult to remove. At the same time, the handle on the inner hard ring also provides convenience for removing the pressure dividing ring.

[0024] This invention creates a cavity between the inner hard ring and the outer elastic ring of the pressure dividing ring and fills it with hydraulic oil. The planar spiral grooves on the upper and lower end faces of the inner hard ring allow the hydraulic oil to move from the outer ring to the inner ring of the cavity. When the outer elastic ring is squeezed, the hydraulic oil can act evenly on the outer elastic ring, so that the silicon steel sheets are fully bonded and uniformly stressed, further ensuring the uniformity of the stacking.

[0025] This invention features a positioning rod that slides radially on a positioning disk. The positioning rod moves synchronously under the action of a drive assembly, which can accurately position multiple silicon steel sheets and pressure dividing rings, ensuring that their axes coincide and that the outer periphery of the formed stator core is smooth, thereby improving product quality. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the structure of a motor stator core stacking device according to an embodiment of the present invention;

[0027] Figure 2 This is an exploded view of a motor stator core stacking device according to an embodiment of the present invention;

[0028] Figure 3 This is an exploded view of the positioning ring frame and positioning rod of a motor stator core stacking device according to an embodiment of the present invention;

[0029] Figure 4 This is a partial structural diagram of the pressure dividing ring of a motor stator core stacking device provided in an embodiment of the present invention;

[0030] Figure 5 This is a cross-sectional view of the pressure dividing ring of a motor stator core stacking device according to an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the internal structure of the pressure dividing ring of a motor stator core stacking device according to an embodiment of the present invention;

[0032] Figure 7 This is an exploded view of the pressure dividing ring of a motor stator core stacking device according to an embodiment of the present invention;

[0033] Figure 8 This is a partial structural schematic diagram of the drive assembly of a motor stator core stacking device according to an embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of the drive assembly of a motor stator core stacking device according to an embodiment of the present invention;

[0035] Figure 10 A top view of the drive assembly of a motor stator core stacking device according to an embodiment of the present invention;

[0036] Figure 11 for Figure 10 A first state diagram of the drive assembly of the motor stator core stacking device provided in one embodiment, cut along section AA;

[0037] Figure 12 for Figure 10 A second state diagram of the drive assembly of the motor stator core stacking device provided in one embodiment, cut along AA.

[0038] in:

[0039] 100. Frame; 110. Worktable; 120. Positioning plate; 130. Support plate; 131. First sliding groove; 140. Positioning ring frame; 141. Second sliding groove; 150. Hydraulic cylinder; 160. Top plate;

[0040] 200, pressure dividing ring; 210, inner hard ring; 220, outer elastic ring; 230, planar spiral groove; 240, ring groove; 250, through groove; 260, handle; 270, bolt;

[0041] 300, Positioning rod; 310, Clip rod; 320, Slider; 330, Slide plate; 340, First telescopic cylinder; 350, Second telescopic cylinder;

[0042] 400. Drive assembly; 410. Hydraulic ring; 420. Rotating ring; 421. Inclined groove; 430. Rotating sleeve; 431. Inclined bar; 440. Sliding ring; 441. Connecting inclined block; 450. Connecting ring; 460. Sealing cavity; 470. Oil inlet;

[0043] 500. Silicon steel sheet. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0045] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They 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, and therefore should not be construed as limiting the invention.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] The following reference Figures 1-12This invention describes a motor stator core stacking device.

[0048] A motor stator core stacking device, adapted for the stacking manufacturing of stator cores for electric vehicle motors, includes a frame 100, on which a worktable 110 is provided. The worktable 110 is used to stack stator cores, which are composed of multiple silicon steel sheets 500 stacked together. The silicon steel sheets 500 are annular. A positioning plate 120 is provided on the worktable 110 for supporting and positioning the silicon steel sheets 500. A press assembly is also provided on the frame 100 for pressing the multiple silicon steel sheets 500 positioned on the positioning plate 120, thereby causing the multiple silicon steel sheets 500 to adhere together.

[0049] In existing stator core manufacturing technology, a small number of silicon steel sheets 500 are first stacked into one layer, and then multiple layers are stacked into a whole. This method allows for precise positioning of the first small number of sheets, effectively reducing the cumulative error of subsequent stacks, improving magnetic circuit distribution, reducing core eddy current losses and noise, and avoiding stress unevenness or damage to the silicon steel sheet 500 insulation layer caused by stacking the whole at once. It also facilitates segmented assembly and quality control in automated production. However, segmented stacking equipment usually requires multiple segments to be assembled and stacked again after each segment is stacked separately, resulting in too many stacking times and wasting time. Furthermore, stacking the stacking surfaces simultaneously can easily form air bubbles in the middle of the stacking surfaces, leading to problems such as poor contact and damage to the silicon steel sheet 500 insulation layer.

[0050] Based on this, the present invention provides a pressure dividing ring 200, which is installed between N adjacent silicon steel sheets 500, where N is a positive integer. For example, when N is 10, the pressure dividing ring 200 is installed between 10 adjacent silicon steel sheets 500, forming a group of 10 silicon steel sheets 500. Assuming the stator core requires 1000 layers of silicon steel sheets 500, a pressure dividing ring 200 is set between every 10 silicon steel sheets 500, for a total of 100 groups, or 101 pressure dividing rings 200 are needed. After the press assembly extrudes the silicon steel sheets 500, every 10 silicon steel sheets 500 adhere to each other to form a complete group. After the press assembly performs one compression, the operator removes the pressure rings 200 between 10 adjacent groups of silicon steel sheets 500. At this point, the 10 groups of silicon steel sheets 500 form a new group, that is, 100 silicon steel sheets 500 per group, for a total of 10 groups. At this point, only 11 pressure rings 200 remain. The press assembly then compresses the silicon steel sheets 500 a second time, causing every 100 silicon steel sheets 500 to adhere to each other and form a complete group. Subsequently, the remaining pressure rings 200 are removed, and the press assembly performs a third compression, causing 1000 silicon steel sheets 500 to adhere to each other and form the stator core.

[0051] It is understandable that 1000 silicon steel sheets 500 are only extruded three times. If the segmented stacking equipment in the existing technology is used, the silicon steel sheets 500 that are divided into small segments are combined in pairs. Assuming there are 10 silicon steel sheets 500 in total, after being combined in pairs, they form 5 segments. At this time, the press assembly has already extruded 5 times. Then, these 5 silicon steel sheets 500 are combined in pairs again, which requires a lot of extrusion times to make the stator core, resulting in low processing efficiency of the stator core.

[0052] It should be noted that the upper and lower end faces of the pressure dividing ring 200 in this invention are both elastic inclined surfaces. The thickness of the pressure dividing ring 200 gradually increases radially from the inner diameter to the outer diameter. When the pressure dividing ring 200 is installed between N adjacent silicon steel sheets 500 and the press assembly is not pressing the pressure dividing ring 200, the elastic inclined surfaces of the upper and lower end faces of the pressure dividing ring 200 contact the end faces of the silicon steel sheets 500. The thicker part of the pressure dividing ring 200 contacts the end faces of the silicon steel sheets 500 first, while the thinner part of the pressure dividing ring 200 has a gap with the silicon steel sheets 500. When the press assembly presses the silicon steel sheets 500... At 00:00, the thicker part of the pressure dividing ring 200 is first squeezed by the silicon steel sheet 500, so the part of the silicon steel sheet 500 in contact with the elastic inclined surface is first subjected to the compressive force. As the compression continues, the contact area between the elastic inclined surface and the end face of the silicon steel sheet 500 gradually increases, thereby clearing the air between the silicon steel sheets 500 and finally making them completely bonded. The elastic inclined surface ensures that adjacent silicon steel sheets 500 are not bonded at the same time, but gradually bonded from the outer ring to the inner ring, thereby preventing the formation of air bubbles between adjacent silicon steel sheets 500 and improving the bonding uniformity of the silicon steel sheets 500.

[0053] Meanwhile, by setting the elastic inclined surface on the pressure dividing ring 200, when it is necessary to separate the pressure dividing ring 200, the pressure dividing ring 200 gradually separates from the end face of the silicon steel sheet 500 under the action of the elastic inclined surface to recover its deformation. When the press assembly no longer applies pressure to the silicon steel sheet 500, the thinner part of the pressure dividing ring 200 separates from the end face of the silicon steel sheet 500 first, and then the thicker part gradually separates from the end face of the silicon steel sheet 500 when it recovers its deformation, thus avoiding the phenomenon that the pressure dividing ring 200 and the silicon steel sheet 500 stick together and cannot be removed.

[0054] Specifically, such as Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the pressure dividing ring 200 in this embodiment includes an inner hard ring 210 and an outer elastic ring 220. The outer elastic ring 220 is sealed to the outer periphery of the upper and lower end faces of the inner hard ring 210. The inner hard ring 210 and the outer elastic ring 220 are coaxially arranged, and a cavity is formed between the inner hard ring 210 and the outer elastic ring 220. The cavity is filled with hydraulic oil. The vertical distance between the outer elastic ring 220 and the inner hard ring 210 gradually increases radially from the inner diameter to the outer diameter, thereby forming an upper... As described above, when the press assembly extrudes the silicon steel sheet 500, the outer end face of the outer elastic ring 220 gradually adheres to the end face of the silicon steel sheet 500, and the cavity between the inner hard ring 210 and the outer elastic ring 220 is gradually compressed, the hydraulic oil inside the cavity is squeezed, and the cavities of the upper and lower end faces of the inner hard ring 210 are connected. In this embodiment, planar spiral grooves 230 are provided on both the upper and lower end faces of the inner hard ring 210. The planar spiral grooves 230 allow the hydraulic oil to move from the outer ring of the cavity to the inner ring of the cavity.

[0055] It is understandable that when the outer elastic ring 220 is compressed, the outer ring of the cavity has a large variable. The hydraulic oil in the outer ring of the cavity can move to the inner ring of the cavity through the planar spiral groove 230, thereby avoiding the situation where the hydraulic oil cannot flow and the outer elastic ring 220 cannot deform elastically. At the same time, the planar spiral groove 230 allows the hydraulic oil to be evenly distributed on the end face of the inner hard ring 210, so that when the outer elastic ring 220 is fully compressed, the hydraulic oil can act evenly on the outer elastic ring 220, so that the silicon steel sheet 500 can be evenly pressured after it is fully attached to the outer elastic ring 220.

[0056] It should be noted that, as Figure 6 As shown, in order to connect the cavities of the upper and lower end faces of the inner hard ring 210, annular grooves 240 are provided at the position of the upper and lower end faces of the inner hard ring 210 near the outer periphery. A through groove 250 is provided at the bottom of the annular groove 240, and the through groove 250 connects the annular grooves 240 of the upper and lower end faces, thereby connecting the cavities of the upper and lower end faces of the inner hard ring 210.

[0057] In a further embodiment, such as Figure 6 and Figure 7 As shown, in order to facilitate the removal of the pressure dividing ring 200, two handles 260 are fixedly provided on the outer periphery of the inner hard ring 210. When the operator or the robotic arm removes the pressure dividing ring 200, the pressure dividing ring 200 can be removed by pulling the two handles 260, which is convenient for operation.

[0058] It should be noted that, as Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, in this embodiment, the inner ring of the outer elastic ring 220 is fixedly connected to the inner ring of the inner hard ring 210 by bolts 270. The outer periphery of the outer elastic ring 220 is slidably sealed around the outer periphery of the inner hard ring 210, and a sealing ring is provided between the outer elastic ring 220 and the inner hard ring 210. The sealing ring can enhance the sealing performance of the cavity formed between the outer elastic ring 220 and the inner hard ring 210. When the outer ring of the outer elastic ring 220 contacts the silicon steel sheet 500, the outer ring of the outer elastic ring 220 will move up and down relative to the outer ring of the inner hard ring 210. At this time, the sealing ring plays a sealing role. The hydraulic oil in the cavity is squeezed and moves towards the inner ring through the planar spiral groove 230, so that there is hydraulic oil in all positions of the cavity, avoiding uneven pressure in different positions inside the cavity.

[0059] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, to facilitate the positioning of multiple silicon steel sheets 500 on the positioning disk 120, three positioning rods 300 that slide radially are provided on the positioning disk 120. The three positioning rods 300 are evenly distributed around the circumference of the positioning disk 120. The three positioning rods 300 are located on the outer periphery of the pressure dividing ring 200 and the silicon steel sheets 500. In this embodiment, the pressure dividing ring 200 and the silicon steel sheets 500 have the same diameter. When the three positioning rods 300 approach each other radially, they can simultaneously contact the outer periphery of the pressure dividing ring 200 and the silicon steel sheets 500, thereby positioning the multiple silicon steel sheets 500 and the multiple pressure dividing rings 200, so that the axes of the multiple silicon steel sheets 500 and the multiple pressure dividing rings 200 coincide, thereby ensuring that the outer periphery of the formed stator core is smooth.

[0060] More specifically, the present invention provides a drive assembly 400 on the worktable 110. The drive assembly 400 is used to drive three positioning rods 300 to move synchronously along the radial direction, thereby enabling the positioning of multiple silicon steel sheets 500 and multiple pressure dividing rings 200.

[0061] like Figure 2 , Figure 8 , Figure 9 and Figure 10As shown, the drive assembly 400 includes a hydraulic ring 410 and a rotating ring 420. The hydraulic ring 410 is fixedly mounted on the worktable 110 and is coaxial with the positioning disk 120. The rotating ring 420 is rotatably connected to the hydraulic ring 410. Three inclined grooves 421 are formed on the end face of the rotating ring 420. The three inclined grooves 421 are evenly distributed along the circumference of the rotating ring 420 and are inclined in the radial direction of the rotating ring 420. One end of each of the three inclined grooves 421 faces the center of the rotating ring 420, and the other end faces the outer periphery of the rotating ring 420. A support plate 130 is fixedly installed on the workbench 110. The support plate 130 is vertically fixed on the workbench 110. A first sliding groove 131 extending radially along the hydraulic ring 410 is opened on the support plate 130. A slider 320 is slidably installed in the first sliding groove 131. One end of the slider 320 is located in the inclined groove 421, and the slider 320 is fixedly connected to the positioning rod 300. When the rotating ring 420 rotates around its own axis, one end of the slider 320 slides along the first sliding groove 131 under the action of the inclined groove 421, thereby driving the positioning rod 300 to slide radially synchronously.

[0062] It should be noted that, as Figure 2 and Figure 3 As shown, in order to enable the positioning rod 300 to slide radially more stably, a positioning ring frame 140 is fixedly installed on the worktable 110. The positioning ring frame 140 has three second sliding grooves 141 extending radially therein. Slide plates 330 are slidably installed in the second sliding grooves 141. The three slide plates 330 are evenly distributed around the circumference of the positioning ring frame 140, and the three slide plates 330 correspond vertically to the sliders 320 on the hydraulic ring 410. The positioning rod 300 connects the slide plates 330 and the sliders 320 at the same time. The connection of the two ends of the positioning rod 300 to the slide plates 330 and the sliders 320 respectively can improve the stability of the radial sliding of the positioning rod 300.

[0063] Meanwhile, a vertically arranged first telescopic cylinder 340 is fixedly installed on one of the slide plates 330 on the positioning ring frame 140. The telescopic end of the first telescopic cylinder 340 is coaxial with and fixedly connected to the positioning rod 300. The telescopic end of the first telescopic cylinder 340 can drive the positioning rod 300 to extend and retract in the vertical direction. It can be understood that when it is necessary to remove the pressure dividing ring 200, the first telescopic cylinder 340 can be activated to drive one of the three positioning rods 300 to move upward, thereby releasing the restriction of the positioning rod 300 on the pressure dividing ring 200. The end of the positioning rod 300 is raised to the position of the pressure dividing ring 200 to be removed. The operator or the robotic arm pulls the handle 260 on the pressure dividing ring 200 to remove the pressure dividing ring 200. After the pressure dividing ring 200 is removed, the telescopic end of the first telescopic cylinder 340 drives the positioning rod 300 to reset.

[0064] It should be noted that in this embodiment, one of the positioning rods 300 consists of two locking rods 310, and a second telescopic cylinder 350 is fixedly mounted on the slider 320. The second telescopic cylinder 350 is also vertically arranged, and its telescopic end is coaxial and fixedly connected to the lower locking rod 310. The telescopic end of the first telescopic cylinder 340 is coaxial and fixedly connected to the upper locking rod 310. When the two locking rods 310 are engaged with each other, the resulting positioning rod 300 is identical to the other two positioning rods 300. When it is necessary to remove... When the pressure dividing ring 200 is removed, the first telescopic cylinder 340 is extended while the second telescopic cylinder 350 is shortened, thereby moving the two locking rods 310 upwards. When the locking position corresponds to the position of the pressure dividing ring 200 to be removed, the two locking rods 310 disengage under the action of the first telescopic cylinder 340 and the second telescopic cylinder 350 shortening a small distance at the same time. After the two locking rods 310 disengage, a gap is created, which allows the pressure dividing ring 200 to pass through. The pressure dividing ring 200 can then disengage from the silicon steel sheet 500 from the disengaged position.

[0065] It should also be noted that the first telescopic cylinder 340 and the second telescopic cylinder 350 in this embodiment are both hydraulic telescopic cylinders, and the extension and retraction of their telescopic ends can be controlled by a hydraulic system.

[0066] Specifically, such as Figure 1 , Figure 8 , Figure 9 and Figure 10 As shown, to enable the rotating ring 420 to rotate around its own axis and thus drive the three positioning rods 300 to move radially, a rotating sleeve 430 is rotatably disposed inside the hydraulic ring 410. Multiple inclined strips 431 are fixedly disposed on the side wall of the rotating sleeve 430. The multiple inclined strips 431 are evenly distributed circumferentially along the side wall of the rotating sleeve 430 and are inclined vertically. In this embodiment, the upper end of the inclined strips 431 is inclined to the right, and the lower end of the inclined strips 431 is inclined to the left. Teeth are provided on the top of the rotating sleeve 430, and the top of the rotating sleeve 430 engages with the rotating ring 420 through the teeth, enabling the rotating sleeve 430 and the rotating ring 420 to move synchronously. A sliding ring 440 is axially slidable within the hydraulic ring 410. Multiple connecting inclined blocks 441 are arranged on the inner circumference of the sliding ring 440. The inclination direction of the multiple connecting inclined blocks 441 is the same as the inclination direction of the inclined strip 431. The multiple connecting inclined blocks 441 are respectively located between adjacent inclined strips 431. When the sliding ring 440 slides axially, it can drive the rotating sleeve 430 to rotate around its own axis through the connecting inclined blocks 441 and inclined strips 431. The rotating sleeve 430 drives the rotating ring 420 to rotate around its own axis. When the rotating ring 420 rotates, it drives the three positioning rods 300 to move radially along the hydraulic ring 410 through the three inclined grooves 421.

[0067] It should be noted that, as Figure 10 , Figure 11 and Figure 12 As shown, a sealed cavity 460 is formed between the bottom of the sliding ring 440 and the hydraulic ring 410. Two sealing rings are provided at the sliding connection point between the sliding ring 440 and the hydraulic ring 410. These two sealing rings improve the sealing performance of the sealed cavity 460. The sealed cavity 460 can be filled with hydraulic oil. An oil inlet 470 is provided on the outer circumference of the hydraulic ring 410, connecting to the sealed cavity 460. A hydraulic oil pipe (not shown in the figure) is connected to the oil inlet 470. When the hydraulic oil pipe fills the sealed cavity 460 with hydraulic oil, the hydraulic oil pushes the sliding ring 440 upwards along the axial direction of the hydraulic ring 410. Figures 11 to 12 The position of the middle sliding ring 440 changes.

[0068] Specifically, such as Figure 8 and Figure 9 As shown, in order to facilitate the rotational connection between the rotating ring 420 and the hydraulic ring 410, a connecting ring 450 is fixedly provided on the upper end face of the hydraulic ring 410. The connecting ring 450 is coaxially arranged with the hydraulic ring 410. The inner ring of the connecting ring 450 is rotatably connected with the teeth on the lower end face of the rotating ring 420. The inner ring of the connecting ring 450 makes the rotating ring 420 only able to rotate around its own axis.

[0069] It should be noted that the drive assembly 400 in this invention is not limited to the structure described above, but can also be other structures. For example, three hydraulic telescopic cylinders can be used, arranged radially along the positioning plate 120. The telescopic ends of the hydraulic telescopic cylinders are respectively connected to three positioning rods 300. The telescopic ends of the three hydraulic telescopic cylinders extend or retract simultaneously, thereby driving the three positioning rods 300 to move radially. Of course, other structures are also possible, and no specific limitation is made here.

[0070] Specifically, such as Figure 1 and Figure 2 As shown, the press assembly of the present invention includes a hydraulic cylinder 150 and a top plate 160. The hydraulic cylinder 150 is fixedly mounted on the frame 100 and is arranged vertically. The telescopic end of the hydraulic cylinder 150 is connected to the top plate 160. The top plate 160 is used to press the silicon steel sheet 500 and the pressure dividing ring 200.

[0071] The specific working process of the motor stator core stacking device provided by the present invention will be described in conjunction with the above embodiments:

[0072] Install silicon steel sheet 500 and pressure dividing ring 200:

[0073] In the initial state, the sealing cavity 460 inside the hydraulic ring 410 is not filled with hydraulic oil, and the sliding ring 440 is lowered to its lowest position, as shown in the following figure. Figure 11As shown, the sealed cavity 460 between the sliding ring 440 and the hydraulic ring 410 has the smallest volume at this time. The three sliders 320 on the worktable 110 are located at one end of the inclined groove 421 near the outer periphery of the rotating ring 420. The three positioning rods 300 are in a state of being far apart from each other at this time. Then, the silicon steel sheets 500 and the pressure dividing rings 200 are stacked on the positioning plate 120. When stacking, 10 silicon steel sheets 500 are grouped together. First, a pressure dividing ring 200 is placed at the bottom. Then, 10 silicon steel sheets 500 are stacked. Then, another pressure dividing ring 200 is placed. Every 10 silicon steel sheets 500 are stacked, a pressure dividing ring 200 is placed. This continues until all the silicon steel sheets 500 are stacked on the positioning plate 120. Finally, a pressure dividing ring 200 is placed.

[0074] position:

[0075] A hydraulic oil pipe (not shown in the figure) is connected to the oil inlet 470 of the hydraulic ring 410. The hydraulic oil pipe fills the sealing cavity 460 with hydraulic oil, and the volume of the sealing cavity 460 gradually increases, thereby pushing the sliding ring 440 to move upward along the axial direction of the hydraulic ring 410. The specific state is as follows. Figure 12 As shown, since the connecting inclined block 441 on the inner circumference of the sliding ring 440 is located between the adjacent inclined strips 431 on the outer circumference of the rotating sleeve 430, when the sliding ring 440 moves upward, it drives the rotating sleeve 430 to rotate through the connecting inclined block 441 and the inclined strips 431. The rotating sleeve 430 drives the rotating ring 420 to rotate around its own axis by meshing the teeth at the top and the teeth at the bottom of the rotating ring 420. The inclined groove 421 on the upper end face of the rotating ring 420 drives the three sliders 320 to move inward along the radial direction of the hydraulic ring 410, thereby driving the three positioning rods 300 to approach each other to abut against the outer circumference of the multiple silicon steel sheets 500 and the multiple pressure dividing rings 200, so that the axes of the multiple silicon steel sheets 500 and the multiple pressure dividing rings 200 coincide, thereby completing the positioning.

[0076] First squeeze:

[0077] After positioning, the hydraulic cylinder 150 drives the top plate 160 to extend, thereby pressing the uppermost pressure-distributing ring 200. During the pressing process, the outer ring of the outer elastic ring 220 of the pressure-distributing ring 200 first contacts the silicon steel sheet 500, so that the outer ring of the silicon steel sheet 500 is stressed first. Then, it gradually contacts the inner ring from the outer ring, so that the extrusion pressure on the silicon steel sheet 500 gradually moves from the outside to the inside, thereby avoiding the formation of air bubbles between adjacent silicon steel sheets 500. When the adjacent silicon steel sheets 500 are completely bonded, the hydraulic cylinder 150 shortens, driving the top plate 160 to disengage from the uppermost pressure-distributing ring 200. At this time, every 10 silicon steel sheets 500 are completely bonded together as a group. The next pressing requires 10 groups to be formed into a large group. A large group has 100 silicon steel sheets 500. Therefore, the 9 pressure-distributing rings 200 between each large group are removed in sequence.

[0078] Remove the voltage divider ring 200:

[0079] Initially, the two locking rods 310 are positioned close to the positioning plate 120. When the pressure dividing rings 200 need to be removed sequentially from top to bottom, the first telescopic cylinder 340 shortens while the second telescopic cylinder 350 extends, causing the two locking rods 310 to move upward synchronously, thus bringing the locking positions of the two locking rods 310 closer to the uppermost pressure dividing ring 200 that needs to be removed. Subsequently, the first telescopic cylinder 340 and the second telescopic cylinder 350 shorten slightly at the same time, causing the two locking rods 310 to disengage from each other, creating a gap between the two locking rods 310. This gap allows the pressure dividing ring 200 to pass through. The operator or robotic arm grabs the two handles 260 on the pressure dividing ring 200 and pulls the pressure dividing ring 200 out from between the silicon steel sheets 500. Since the outer elastic ring 220 of the pressure dividing ring 200 will recover its deformation when not under pressure, the pressure dividing ring 200 gradually separates from the silicon steel sheet 500, avoiding the situation where the pressure dividing ring 200 is stuck to the silicon steel sheet 500 and cannot be detached.

[0080] Second compression:

[0081] After removing the nine pressure-dividing rings 200 from each large group, the hydraulic cylinder 150 begins to extend, thereby driving the top plate 160 to push the top pressure-dividing ring 200, thus compressing the 10 groups of silicon steel sheets 500 into one large group. If the finished stator core requires 1000 silicon steel sheets 500, there will be 10 large groups. Finally, the 10 large groups are compressed into the stator core. At this time, all pressure-dividing rings 200 except the top and bottom ones need to be removed in sequence.

[0082] Third squeeze:

[0083] After removing all the top and bottom pressure rings 200, the hydraulic cylinder 150 extends and drives the top plate 160 to push the top pressure ring 200, thereby bonding all 10 large groups of silicon steel sheets 500 together to form the stator core.

[0084] It should be noted that the number of silicon steel sheets 500 required for different stator cores varies. The number of silicon steel sheets 500 stacked in each group can be adjusted according to the different number of silicon steel sheets 500. No specific limit is made here.

[0085] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A motor stator core stacking device, characterized in that, include: A frame, on which a worktable is provided, and a positioning plate is provided above the worktable. The positioning plate is used to support and position silicon steel sheets, and multiple silicon steel sheets are stacked on each other to form a stator core. A press assembly for pressing multiple silicon steel sheets on the positioning plate to make the multiple silicon steel sheets fit together; The pressure dividing ring is located between N adjacent silicon steel sheets, where N is a positive integer. The upper and lower end faces of the pressure dividing ring are both elastic inclined surfaces, and the thickness of the pressure dividing ring gradually increases radially from the inner diameter to the outer diameter. The pressure dividing ring includes an inner hard ring and two outer elastic rings. The outer elastic rings are sealed to the outer circumference of both the upper and lower end faces of the inner hard ring. A cavity is formed between the inner hard ring and the outer elastic rings. The cavity is filled with hydraulic oil. The vertical distance between the outer elastic ring and the inner hard ring gradually increases radially from the inner diameter to the outer diameter. Planar spiral grooves are formed on both the upper and lower end faces of the inner hard ring. The positioning disk is provided with three positioning rods that slide radially thereon. The three positioning rods are evenly distributed around the circumference of the positioning disk. The diameter of the pressure dividing ring is the same as the diameter of the silicon steel sheet. The three positioning rods are located on the outer periphery of the pressure dividing ring and the silicon steel sheet. A positioning ring frame is fixedly installed on the workbench. Three sliding plates are radially slidably installed on the positioning ring frame. The three sliding plates are evenly distributed along the circumference of the positioning ring frame. The three sliding plates are fixedly connected to three positioning rods respectively. A vertically arranged telescopic cylinder is fixedly installed on one of the three sliding plates. The telescopic end of the telescopic cylinder is coaxial with and fixedly connected to one of the three positioning rods. The workbench is equipped with a drive assembly, which can drive three positioning rods to move synchronously along the radial direction. The drive assembly includes a hydraulic ring and a rotating ring. The hydraulic ring is fixedly mounted on the worktable, and the rotating ring is rotatably connected to the hydraulic ring. The end face of the rotating ring has three inclined grooves, which are evenly distributed along the circumference of the rotating ring. A slider is provided on the worktable that slides radially along the hydraulic ring. One end of the slider is slidably mounted in the inclined groove, and the slider is connected to a positioning rod.

2. The motor stator core stacking equipment according to claim 1, characterized in that, Two handles are fixedly installed on the outer periphery of the inner hard ring.

3. The motor stator core stacking equipment according to claim 1, characterized in that, A rotating sleeve is rotatably disposed inside the hydraulic ring. Multiple inclined strips are fixedly disposed on the side wall of the rotating sleeve, and the multiple inclined strips are all inclined in the vertical direction. The top end of the rotating sleeve engages with the rotating ring. A sliding ring is axially slidably disposed inside the hydraulic ring. A connecting inclined block is disposed on the inner circumference of the sliding ring. The inclined block and the inclined strip are inclined in the same direction. The connecting inclined block is located between two adjacent inclined strips. A sealed cavity is formed between the sliding ring and the hydraulic ring. The sealed cavity is filled with hydraulic oil.

4. The motor stator core stacking equipment according to claim 3, characterized in that, The hydraulic ring has an oil inlet on its outer periphery, and the oil inlet is connected to the sealed cavity.

5. The motor stator core stacking equipment according to claim 1, characterized in that, The press assembly includes a hydraulic cylinder and a top plate. The hydraulic cylinder is fixedly mounted on the frame and arranged vertically. The telescopic end of the hydraulic cylinder is connected to the top plate.

Images