Core expansion device and method

Abstract

The present invention relates to an iron core unfolding device and method, comprising a base plate, a sliding plate and a driving unit for driving the sliding plate to slide, the sliding plate being fixedly provided with a leaning plate and a positioning column; the device also comprises a first hinge plate and a second hinge plate, a reference block being provided on one side of the leaning plate, and a plurality of positioning seats being arranged around the positioning column to form a positioning base for positioning the iron core; an L-shaped limiting plate is provided on the base plate, a positioning plate for positioning the positioning base being provided at the upper end of the limiting plate, a retracting positioning groove being provided on the positioning plate, and the device also comprises a tilting unit for driving the base plate to rotate and tilt; the natural unfolding action of the iron core can be completed by utilizing the dead weight of the first hinge plate and the second hinge plate and the assistance of the positioning plate, without the need to design a complex contour-matching driving structure, thereby shortening the development cycle and reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of motor processing, and more particularly to an iron core unfolding device and method. Background Art

[0002] The stator core is one of the important components of the motor. When loading the stator core, the entire core is often loaded, then split into multiple core units, and the core units are unfolded to facilitate the subsequent winding process of the individual core units. This step is usually called the de-circling and unfolding process in the industry.

[0003] In the existing unfolding operation, most of it still relies on manual work. For example, the Chinese application, application number CN201810902560.4 discloses a self-locking motor stator core with a block hinge suitable for unfolding winding. Its unfolding structure relies on the hinged structural design between adjacent core monomers. However, this design is not suitable for promotion and popularization, so as to be more widely used in the winding processing of various types of motors. In order to solve the problem of the applicability of the automatic unfolding of this type of core monomer, a core unfolding device and method are needed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an iron core expansion device and an iron core expansion method in response to the above-mentioned defects of the prior art.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] The cam is fixedly provided with a first hinge plate and a second hinge plate, and the first hinge plate and the second hinge plate have the same structure and are both hingedly connected in sequence with a plurality of positioning seats for positioning the iron core monomer; a reference block is provided on one side of the positioning plate and is horizontally opposite to the axis of the positioning column, and two sides of the reference block are hingedly connected to the positioning seat at one end of the first hinge plate and the positioning seat at one end of the second hinge plate respectively. A plurality of the positioning seats can be arranged around the positioning column to form a positioning base for positioning the iron core; an L-shaped limit plate is provided on the base plate, and a positioning plate for positioning the positioning base is provided on the upper end of the limit plate, and a folding positioning groove is provided on the positioning plate. The device also includes a tilting unit for driving the base plate to rotate and tilt. When the base plate is tilted, the direction of the rotation axis is parallel to the length direction of the positioning plate. The folding positioning groove is used to fold and position the positioning seat at one end of the first hinge plate and the positioning seat at one end of the second hinge plate in the tilted state, and a buffer layer is provided on the positioning plate.

[0007] The iron core unfolding device described in the present invention, wherein the positioning seat includes a base, a positioning step is provided on the upper part of the base, the vertical surface of the positioning step is provided with an arc surface matching the iron core monomer, the transverse surface of the positioning step is an isosceles trapezoidal shape, and two positioning blocks are provided on the transverse surface of the positioning step, a positioning groove for positioning the middle part of the iron core monomer is left between the two positioning blocks, and a positioning protrusion for positioning the front end of the iron core monomer is also provided on the transverse surface of the positioning step.

[0008] The iron core unfolding device described in the present invention, wherein the positioning seat also includes a column with a rectangular or square cross-section, the front side of the column is provided with the arc surface, and the rear side of the column is a plane that cooperates with the positioning plate; the adjacent positioning seats are hinged by a rotating shaft, and the left and right sides of the column are provided with side wings for installing the rotating shaft.

[0009] The iron core unfolding device described in the present invention is characterized in that the positioning seat is provided with a first adsorption magnet for adsorbing the iron core unit for positioning, and the positioning plate is provided with a bar-shaped iron piece that cooperates with multiple first adsorption magnets for adsorption; and the positioning column is provided with multiple second adsorption magnets that correspond one-to-one with the first adsorption magnets for adsorption.

[0010] The iron core unfolding device described in the present invention is characterized in that two side-by-side sliding rails slidably connected to the sliding plate are provided on the base plate, the driving unit includes a driving motor fixed on the base plate and a driving rack fixed on the lower surface of the sliding plate, and the movable end of the driving motor is provided with a driving gear meshing with the driving rack.

[0011] The iron core unfolding device described in the present invention, wherein the tilting unit includes a mounting seat, a deflection shaft is rotatably provided on the mounting seat, and a connecting plate fixed to the base plate is provided on the deflection shaft; a cam mechanism and a tensioning spring are provided on the mounting seat, which are respectively located on both sides of the deflection shaft; the cam mechanism is used to lift one side of the base plate, and the tensioning spring is used to provide a clamping force on the other side of the base plate.

[0012] The core unfolding device of the present invention, wherein, in the initial position, the multiple positioning seats in the first hinge plate and the second hinge plate are all in contact with the positioning plate, and the deflection axis is located directly below the positioning plate.

[0013] In the iron core unfolding device of the present invention, the driving motor is arranged on a side of the base plate close to the tensioning spring.

[0014] In the iron core unfolding device described in the present invention, the slotted edge of the retracted positioning groove is provided with two guide surfaces, and the inner wall of the retracted positioning groove is provided with multiple positioning surfaces for positioning the tail ends of the corresponding positioning seats.

[0015] A core expansion method, using the core expansion device as described above, wherein the method comprises the steps of:

[0016] The tilting unit drives the bottom plate to rotate and tilt at a first set angle, so that the positioning plate is located on the lower side of the bottom plate. At this time, the first hinge plate and the second hinge plate are partially wound around the positioning column by gravity;

[0017] The driving unit drives the sliding plate to slide, so that the positioning plate moves toward the positioning post. The retracting positioning groove on the positioning plate retracts and squeezes the positioning seats hanging down from the first hinge plate and the second hinge plate toward the middle and positions them. At this time, the first hinge plate and the second hinge plate are completely wrapped around the positioning post to form an annular positioning base.

[0018] The tilting unit drives the bottom plate to rotate in the opposite direction to restore the horizontal state, and the core monomers of the de-rounded core are placed one by one on the multiple positioning seats constituting the positioning base to complete the core loading;

[0019] The tilting unit drives the bottom plate to rotate toward the other side to tilt to a second set angle, the driving unit drives the sliding plate to slide, the positioning plate releases the pressure on the positioning seats at the ends of the first hinge plate and the second hinge plate, and the first hinge plate and the second hinge plate are naturally unfolded by their own weight and fit into the positioning plate to complete the unfolding;

[0020] The tilting unit drives the bottom plate to rotate in the opposite direction to restore the horizontal state.

[0021] When the cam is in the closed position, the first hinge plate and the second hinge plate are in the closed position, and the cam is in the closed position, so that the cam is in the closed position and the cam is in the closed position.

[0022] By applying the method of the present application, the natural expansion of the iron core can be completed by utilizing the deadweight of the first hinge plate and the second hinge plate, and the assistance of the positioning plate. Moreover, during the expansion process, the positioning seat is only affected by the force of the adjacent positioning seat, and will not be affected by the force of the drive component. There is no need to design a complex contoured drive structure, which can shorten the development cycle, reduce costs, and reduce accidental force damage. The overall length and width dimensions can also be made smaller, which is convenient for assembly with other components on the motor assembly production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts.

[0024] Figure 1 2. It is a top view of the sliding plate of the core expansion device of the preferred embodiment of the present invention;

[0025] Figure 2 yes Figure 1 The enlarged schematic diagram of point C in the middle;

[0026] Figure 3 yes Figure 1 Schematic diagram of the local structure from another perspective;

[0027] Figure 4 This is a cross-sectional view of the structure of the iron core expansion device of a preferred embodiment of the present invention;

[0028] Figure 5 It is a flow chart of the core expansion method of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the following will be a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work shall fall within the scope of protection of the present invention.

[0030] The core expansion device of the preferred embodiment of the present invention is as follows Figure 1 See also Figure 2-Figure 4, including a base plate 1, on which a sliding plate 2 and a driving unit 3 for driving the sliding plate to slide are slidably provided, and a positioning plate 20 and a positioning column 21 are fixedly provided on the sliding plate 2; the device also includes a first hinge plate 4 and a second hinge plate 5, which have the same structure and are formed by a plurality of positioning seats 40 for positioning the iron core monomer 6 in sequence; a reference block 200 is provided on one side of the positioning plate 20, which is horizontally opposite to the axis of the positioning column 21, and the two sides of the reference block 200 are respectively hinged to the positioning seat at one end of the first hinge plate 4 and the positioning seat at one end of the second hinge plate 5, and the plurality of positioning seats 4 0 can be arranged around the positioning column 21 to form a positioning base for positioning the iron core; an L-shaped limit plate 10 is provided on the bottom plate 1, and a positioning plate 11 is provided on the upper end of the limit plate 10 for positioning the positioning base. A retraction positioning groove 110 is provided on the positioning plate 11. The device also includes a tilting unit 7 that drives the bottom plate 1 to rotate and tilt. When the bottom plate 1 is tilted, the direction of the rotation axis is parallel to the length direction of the positioning plate 20. The retraction positioning groove 110 is used to retract and position the positioning seat at one end of the first hinge plate 4 and the positioning seat at one end of the second hinge plate 5 in the tilted state. A buffer layer (not shown in the figure) is provided on the positioning plate 20;

[0031] The tilting unit 7 drives the bottom plate 1 to rotate and tilt to a first set angle (20-35 degrees), so that the positioning plate 21 is located on the lower side of the bottom plate 1. At this time, the first hinge plate 4 and the second hinge plate 5 are wound around the positioning column 21 by the gravity part (positioning seat); the driving unit 3 drives the sliding plate 2 to slide, so that the positioning plate 11 moves toward the positioning column 21, and the retraction positioning groove 110 on the positioning plate 11 retracts the positioning seats of the first hinge plate 4 and the second hinge plate 5 hanging toward the middle and squeezes them into position. At this point, the first hinge plate 4 and the second hinge plate 5 are completely wound around the positioning column and form a ring-shaped positioning base (see Figure 1 、 Figure 3 State A in

[0032] The tilting unit 7 drives the bottom plate 1 to rotate in the opposite direction to restore the horizontal state, and the core monomers 6 of the de-rounded core are placed one by one on the multiple positioning seats constituting the positioning base, completing the core loading;

[0033] The tilting unit 7 drives the bottom plate 1 to rotate toward the other side to tilt the second set angle, the driving unit 3 drives the sliding plate 2 to slide, the positioning plate 11 releases the pressure on the positioning seats at the ends of the first hinge plate 4 and the second hinge plate 5, and the first hinge plate 4 and the second hinge plate 5 are naturally unfolded by their own weight and fit against the positioning plate 20 (buffer layer for buffering), completing the unfolding (see Figure 1 、 Figure 3 State B in the

[0034] The tilting unit 7 drives the bottom plate 1 to rotate in the opposite direction to restore the horizontal state;

[0035] By applying the method of the present application, the natural expansion of the iron core can be completed by utilizing the deadweight of the first hinge plate 4 and the second hinge plate 5, and the assistance of the positioning plate 11. Moreover, during the expansion process, the positioning seat is only affected by the force of the adjacent positioning seat, and will not be affected by the force of the drive component. There is no need to design a complex contoured drive structure, which can shorten the development cycle, reduce costs, and reduce accidental force damage. The overall length and width dimensions can also be made smaller, which is convenient for assembly with other components on the motor assembly production line.

[0036] Preferably, the positioning seat 40 includes a base 400, a positioning step 401 is provided on the upper part of the base 400, the vertical surface of the positioning step 401 is provided with an arc surface 4010 matching the core monomer 6, the transverse surface of the positioning step 401 is an isosceles trapezoid, and two positioning blocks 4011 are provided on the transverse surface of the positioning step 401, a positioning groove 4012 for positioning the middle part of the core monomer 6 is left between the two positioning blocks 4011, and a positioning protrusion 4013 for positioning the front end of the core monomer 6 is also provided on the transverse surface of the positioning step 401; with this structural design, the core monomer 6 can be positioned from four directions of front, back, left and right, with good positioning reliability and not prone to displacement.

[0037] Preferably, the positioning seat 40 also includes a column 402 with a rectangular or square cross-section, the front side of the column 402 is provided with a curved surface 4010, and the rear side of the column 402 is a plane that cooperates with the positioning plate 20; adjacent positioning seats 40 are hinged through a rotating shaft 403, and the left and right sides of the column 402 are provided with side wings 4020 for installing the rotating shaft 403; the structural layout is reasonable and compact, and the integrity is good.

[0038] Preferably, the positioning seat 40 is provided with a first adsorption magnet (not shown in the figure) for adsorbing the iron core monomer 6 for positioning, and the positioning plate 20 is provided with a bar-shaped iron piece (not shown in the figure) that cooperates with multiple first adsorption magnets for adsorption. By adopting this kind of magnetic attraction cooperation relationship, the stability of the iron core monomer 6 after being placed on the positioning seat 40 can be improved, and it is not easy to fall off; the positioning column 21 is provided with multiple second adsorption magnets that correspond one-to-one with the first adsorption magnets for adsorption. By adopting this kind of magnetic attraction cooperation relationship, the reliability of multiple positioning seats leaning on the positioning plate 20 can be improved, and they are not easy to fall off.

[0039] Preferably, two parallel slide rails 12 are provided on the base plate 1 for sliding connection with the sliding plate 2. The driving unit 3 includes a driving motor 30 fixed on the base plate 1 and a driving rack 31 fixed on the lower surface of the sliding plate 2. The movable end of the driving motor 30 is provided with a driving gear 32 meshing with the driving rack 31. The driving structure is simple and the driving reliability is good.

[0040] The cam mechanism 73 of the present invention is used to move the handle 74 of the vehicle frame 1 so that the vehicle frame 1 can be tilted to the left or right by the cam mechanism 73. When the cam mechanism 73 is pressed, the vehicle frame 1 can be tilted to the left or right by the cam mechanism 73. When the cam mechanism 73 is pressed, the vehicle frame 1 can be tilted to the left or right by the cam mechanism 73. When the cam mechanism 73 is pressed, the vehicle frame 1 can be tilted to the left or right by the cam mechanism 73. When the cam mechanism 73 is pressed, the vehicle frame 1 can be tilted to the left or right by the cam mechanism 73. When the cam mechanism 73 is pressed, the vehicle frame 1 can be tilted to the left or right by the cam mechanism 73. When the cam mechanism 73 is pressed, the vehicle frame 1 can be tilted to the left or right by the cam mechanism 73.

[0041] Preferably, the groove edge of the folding positioning groove 110 is provided with two guide surfaces 1100, and the inner wall of the folding positioning groove 110 is provided with multiple positioning surfaces 1101 for positioning the tail end of the corresponding positioning seat 40, wherein the guide surface 1100 plays a folding guiding role, and the positioning surface 1101 is used to maintain the state of the positioning base.

[0042] A core expansion method, using the core expansion device as described above, such as Figure 5 As shown, the method includes the steps of:

[0043] S01: The tilting unit drives the bottom plate to rotate and tilt to a first set angle, so that the positioning plate is located on the lower side of the bottom plate. At this time, the first hinge plate and the second hinge plate are partially wound around the positioning column by gravity;

[0044] S02: The driving unit drives the sliding plate to slide, causing the positioning plate to move toward the positioning post. The retracting positioning grooves on the positioning plate retract the positioning seats hanging from the first hinge plate and the second hinge plate toward the middle and squeeze them into position. At this time, the first hinge plate and the second hinge plate are completely wrapped around the positioning post to form an annular positioning base.

[0045] S03: The tilting unit drives the bottom plate to rotate in the opposite direction to restore the horizontal state, and the core monomers of the de-rounded core are placed one by one on the multiple positioning seats constituting the positioning base, completing the core loading;

[0046] S04: The tilting unit drives the bottom plate to rotate toward the other side to tilt by a second set angle, and the driving unit drives the sliding plate to slide. The positioning plate releases the pressure on the positioning seats at the ends of the first hinge plate and the second hinge plate. The first hinge plate and the second hinge plate are naturally unfolded by their own weight and fit into the positioning plate to complete the unfolding.

[0047] S05: The tilting unit drives the bottom plate to rotate in the opposite direction to restore the horizontal state;

[0048] By applying the method of the present application, the natural expansion of the iron core can be completed by utilizing the deadweight of the first hinge plate and the second hinge plate, and the assistance of the positioning plate. Moreover, during the expansion process, the positioning seat is only affected by the force of the adjacent positioning seat, and will not be affected by the force of the drive component. There is no need to design a complex contoured drive structure, which can shorten the development cycle, reduce costs, and reduce accidental force damage. The overall length and width dimensions can also be made smaller, which is convenient for assembly with other components on the motor assembly production line.

[0049] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A core expansion device, characterized in that: The cam is fixed with a first hinge plate and a second hinge plate, and the first hinge plate and the second hinge plate have the same structure and are formed by hingedly connecting a plurality of positioning seats for positioning the iron core monomer; a reference block is provided on one side of the positioning plate and is horizontally opposite to the axis of the positioning column, and the two sides of the reference block are respectively hinged with the positioning seat at one end of the first hinge plate and the positioning seat at one end of the second hinge plate, and a plurality of positioning seats are hinged. The cam is provided with an L-shaped limit plate, and the upper end of the limit plate is provided with a positioning plate for positioning the positioning base, and the positioning plate is provided with a folding positioning groove. The device also includes a tilting unit for driving the base plate to rotate and tilt. When the base plate is tilted, the direction of the rotation axis is parallel to the length direction of the positioning plate. The folding positioning groove is used to fold and position the positioning seat at one end of the first hinge plate and the positioning seat at one end of the second hinge plate in the tilted state, and a buffer layer is provided on the positioning plate.

2. The core expansion device according to claim 1, characterized in that: The positioning seat includes a base, a positioning step is provided on the upper part of the base, the vertical surface of the positioning step is provided with an arc surface matching the iron core monomer, the transverse surface of the positioning step is an isosceles trapezoidal shape, and two positioning blocks are provided on the transverse surface of the positioning step, a positioning groove for positioning the middle part of the iron core monomer is left between the two positioning blocks, and a positioning protrusion for positioning the front end of the iron core monomer is also provided on the transverse surface of the positioning step.

3. The core expansion device according to claim 2, characterized in that: The positioning seat also includes a column with a rectangular or square cross-section, the front side of the column is provided with the arc surface, and the rear side of the column is a plane that cooperates with the positioning plate; the adjacent positioning seats are hinged by a rotating shaft, and the left and right sides of the column are provided with side wings for installing the rotating shaft.

4. The core expansion device according to claim 2, characterized in that: The positioning seat is provided with a first adsorption magnet for positioning the iron core unit, and the positioning plate is provided with a bar-shaped iron piece that cooperates with multiple first adsorption magnets for adsorption; the positioning column is provided with multiple second adsorption magnets that correspond one-to-one with the first adsorption magnets for adsorption.

5. The core expansion device according to claim 1, characterized in that: The base plate is provided with two parallel sliding rails slidably connected to the sliding plate. The driving unit includes a driving motor fixed on the base plate and a driving rack fixed on the lower surface of the sliding plate. The movable end of the driving motor is provided with a driving gear meshing with the driving rack.

6. The core expansion device according to claim 5, characterized in that: The tilting unit includes a mounting seat, a deflection shaft is rotatably provided on the mounting seat, and a connecting plate fixed to the base plate is provided on the deflection shaft; a cam mechanism and a tensioning spring are provided on the mounting seat and are respectively located on both sides of the deflection shaft; the cam mechanism is used to lift one side of the base plate, and the tensioning spring is used to provide a clamping force on the other side of the base plate.

7. The core expansion device according to claim 6, characterized in that: In the initial position, the plurality of positioning seats in the first hinge plate and the second hinge plate are all in contact with the leaning plate, and the deflection axis is located directly below the leaning plate.

8. The core expansion device according to claim 7, characterized in that: The driving motor is arranged on a side of the base plate close to the tension spring.

9. The core expansion device according to claim 1, characterized in that: The groove edge of the folded positioning groove is provided with two guide surfaces, and the inner wall of the folded positioning groove is provided with a plurality of positioning surfaces for positioning the tail end of the corresponding positioning seat.

10. A core expansion method, using the core expansion device according to any one of claims 1 to 9, characterized in that: The method comprises the steps of: The tilting unit drives the bottom plate to rotate and tilt at a first set angle, so that the positioning plate is located on the lower side of the bottom plate. At this time, the first hinge plate and the second hinge plate are partially wound around the positioning column by gravity; The driving unit drives the sliding plate to slide, so that the positioning plate moves toward the positioning post. The retracting positioning groove on the positioning plate retracts and squeezes the positioning seats hanging down from the first hinge plate and the second hinge plate toward the middle and positions them. At this time, the first hinge plate and the second hinge plate are completely wrapped around the positioning post to form an annular positioning base. The tilting unit drives the bottom plate to rotate in the opposite direction to restore the horizontal state, and the core monomers of the de-rounded core are placed one by one on the multiple positioning seats constituting the positioning base to complete the core loading; The tilting unit drives the bottom plate to rotate toward the other side to tilt to a second set angle, the driving unit drives the sliding plate to slide, the positioning plate releases the pressure on the positioning seats at the ends of the first hinge plate and the second hinge plate, and the first hinge plate and the second hinge plate are naturally unfolded by their own weight and fit into the positioning plate to complete the unfolding; The tilting unit drives the bottom plate to rotate in the opposite direction to restore the horizontal state.

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