Plane bending device for bending flat wire

Abstract

The utility model relates to the technical field of flat wire forming equipment, and provides a plane bending device for bending a flat wire, which comprises a wire feeding device and a wire folding device, the line folding device comprises a supporting frame, a bending assembly, a bending driving assembly and a line pressing assembly. The bending assembly comprises a fixing shaft part and a bending part, wherein the fixing shaft part is provided with a guide groove allowing the flat wire to penetrate through, and the bending part is rotatably arranged on the periphery of the fixing shaft part with the axis of the fixing shaft part as the axis. The bending driving assembly drives the bending part to bend the flat wire outside the guide groove relative to the flat wire inside the guide groove around the fixed shaft part; the wire pressing assembly comprises a wire guiding seat provided with a wire guiding groove communicated with the guiding groove, a jacking and pressing block and a jacking and pressing power piece enabling the jacking and pressing block to jack and press the flat wire located in the wire guiding groove. Compared with the prior art, the flat wire forming device is not only suitable for flat wire forming of hairpin type windings, but also suitable for flat wire forming of I-shaped clip windings and part of stators needing narrow edge bending forming, and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of flat wire forming equipment, in particular to a plane bending device for bending flat wires. Background Art

[0002] A motor with a stator winding using a wire with a rectangular cross-section is called a flat wire motor (also called a Pin motor). Different from a common wound motor, a flat wire motor does not first wind a round wire into a specific coil and then embed it into the stator slot by a machine. Instead, the flat wire (also called copper wire or flat copper wire, hereinafter collectively referred to as flat wire for the sake of unified technical terms) is preformed, inserted into the stator slot, and then formed and welded again at one end or both ends to form the entire stator winding. The flat wire is beneficial to improving the slot fill factor of the motor. Generally, the slot fill factor of a round wire motor is about 50%, while that of a flat wire motor can reach more than 70%. According to the winding form of the flat wire motor, it can be further divided into Hair-pin winding (also called hairpin winding, hereinafter collectively referred to as hairpin winding), I-Pin winding (also called I-shaped clamp winding, hereinafter collectively referred to as I-shaped clamp winding), wave winding, etc. At present, for the production of the stator winding of an electric wire motor, the flat wire is first cut by a cutting mechanism and then sent into a corresponding bending device to realize the bending of the flat wire through a bending block arranged therein. In order to prevent the flat wire from warping during bending in the bending device, a pressing mechanism is usually used to cover the flat wire to press the flat wire. However, arranging a pressing mechanism on one side of the bending block is likely to interfere with the bending block during bending, and it is only applicable to the bending and forming of the flat wire of the hairpin winding, with a narrow application range. Content of the Utility Model

[0003] The purpose of the utility model is to provide a plane bending device for bending flat wires, so as to solve the technical problem in the prior art that the bending device is prone to interference with the pressing structure during bending, and the application range of the device is narrow.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a plane bending device for bending flat wires, including a wire feeding device for providing the flat wire to be bent and a wire bending device for receiving the flat wire and bending the flat wire, and the wire bending device is arranged at intervals with the wire feeding device; the wire bending device includes a support frame and the following components supported on the support frame: a bending component, which includes a fixed shaft component having a guiding groove for the flat wire to pass through and a bending component rotatably arranged on the outer periphery of the fixed shaft component with the axis of the fixed shaft component as the axis; a bending driving component for driving the bending component to bend the flat wire outside the guiding groove relative to the flat wire inside the guiding groove around the fixed shaft component; a pressing component, including a wire guiding seat having a wire guiding groove communicated with the guiding groove, a pressing block, and a pressing power component for pressing the flat wire located in the wire guiding groove by the pressing block, and the wire guiding seat is located between the bending component and the wire feeding device.

[0005] Furthermore, the wire groove has two longitudinal groove walls parallel to each other, the top pressure block is slidably arranged on the support frame, and the wire seat is provided with an opening on the longitudinal groove wall for the top pressure block to move in and out of the wire groove.

[0006] Furthermore, the pressing block comprises a connecting portion and a pressing portion which are connected to each other, the connecting portion is connected to the pressing power member, and the pressing portion comprises a pressing surface which abuts against the surface of the flat wire and is parallel to the longitudinal groove wall.

[0007] Furthermore, the top pressing block also includes a convex portion convexly arranged on the top pressing surface, and the convex portion includes a limiting surface located on its bottom surface and parallel to the bottom surface of the wire groove.

[0008] Furthermore, the wire pressing assembly also includes a sliding mounting plate slidably arranged on the support frame and connected to the top pressing power member, and the connecting portion of the top pressing block is fixedly connected to the sliding mounting plate via a fixing block.

[0009] Furthermore, a buffer limiter is provided on the support frame, which is used to abut against the sliding mounting plate to limit the movement of the sliding mounting plate.

[0010] Furthermore, the support frame includes a base plate, a fixed bracket installed on the base plate, a fixed shaft component and a bending drive assembly are fixed on the fixed bracket, and the bending drive assembly is located below the fixed shaft component and fixedly connected to the bending component.

[0011] Furthermore, the bending component includes an annular seat component sleeved on the fixed shaft component and a roller component installed on the annular seat component and used to abut against the side wall of the flat wire, and the annular seat component is fixedly connected to the bending drive assembly.

[0012] Furthermore, a receiving cover plate for contacting with the flat wire and allowing the flat wire to slide is provided on the support frame, and the top surface of the receiving cover plate is flush with the bottom surface of the guide groove.

[0013] Furthermore, the wire feeding device comprises a wire clamping device for clamping the flat wire and a conveying device for moving the wire clamping device along the length direction of the flat wire.

[0014] Compared with the prior art, the utility model provides a planar bending device for bending flat wires, comprising a wire feeding device and a wire folding device. The wire folding device comprises a support frame and a bending assembly, a bending drive assembly and a wire pressing assembly. The wire pressing assembly comprises a wire seat having a wire groove connected to a guide groove, a pressing block and a pressing power member for causing the pressing block to press the flat wire in the wire groove. The wire seat is located between the bending assembly and the wire feeding device.

[0015] The beneficial effects of the planar bending device for bending flat wires provided by the present utility model are as follows: Compared with the prior art, the planar bending device for bending flat wires of the present utility model can prevent the flat wire from warping during bending, which is beneficial to the bending and forming, and there will be no interference with the wire pressing component; By adopting the above-mentioned folding device, the forming requirements for bending flat wires in different directions can be met. It is not only applicable to the flat wire forming of hairpin windings, but also applicable to the flat wire forming of I-shaped clip windings and some stators that require narrow-edge bending and forming, with a wider scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 6 is a three-dimensional schematic diagram of the planar bending device for bending flat wires and the flat wire provided by an embodiment of the present utility model;

[0017] Figure 2 FIG. 10 is a three-dimensional schematic diagram of the folding device provided by an embodiment of the present utility model;

[0018] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in FIG. 16;

[0019] Figure 4 is Figure 2 a cross-sectional view taken along line B-B in FIG. 22;

[0020] Figure 5 is Figure 4 an enlarged view of part C in FIG. 28;

[0021] Figure 6 FIG. 32 is an exploded schematic diagram of the folding device provided by an embodiment of the present utility model.

[0022] MAIN ELEMENT SYMBOL DESCRIPTION

[0023] 100-plane bending device for bending flat wire; 200-flat wire; 10-wire feeding device; 11-wire clamping device; 111-clamping claw; 112-wire clamping power piece; 12-transfer device; 121-transfer bracket; 122-transfer seat; 123-transfer power piece; 20-bending device; 21-support frame; 211-base plate; 211a-base plate through hole; 212-bottom plate; 213-support leg; 214-fixed bracket; 215-pad; 216-gantry; 217-connection seat; 218-top plate; 219-receiving cover plate; 30 -bending assembly; 31-fixed shaft component; 311-guide groove; 32-bending component; 321-annular seat component; 322-roller component; 40-bending drive assembly; 50-wire pressing assembly; 51-wire seat; 511-wire groove; 512-longitudinal groove wall; 513-opening; 52-top pressure block; 521-connecting part; 522-top pressure part; 523-top pressure surface; 524-convex part; 525-limiting surface; 53-top pressure power part; 54-sliding mounting plate; 541-mounting hole; 55-slider; 56-buffer limit part; fixed block 57. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the implementation of the present invention is described in detail below in conjunction with specific drawings.

[0026] For the convenience of description, the "front", "rear", "left", "right", "up" and "down" referred to below are consistent with the front, rear, left, right, up and down directions of the drawings themselves, but do not limit the structure of the present invention.

[0027] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the patent application specification and claims of the utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantity limitation, but indicate the existence of at least one.

[0028] like Figures 1 to 6As shown in the figure, the flat bending device 100 for bending flat wires provided in this embodiment includes a wire feeding device 10 for providing the flat wire 200 to be bent and a wire folding device 20 for receiving the flat wire 200 and bending the flat wire 200. The wire folding device 20 is arranged at intervals with the wire feeding device 10. The wire folding device 20 includes a support frame 21 and the following components supported on the support frame 21: a bending component 30, which includes a fixed shaft component 31 having a guiding groove 311 for the flat wire 200 to pass through and a bending component 32 rotatably arranged on the outer periphery of the fixed shaft component 31 with the axis of the fixed shaft component 31 as the axis; a bending driving component 40 for driving the bending component 32 to bend the flat wire 200 located outside the guiding groove 311 relative to the flat wire 200 inside around the fixed shaft component 31; a wire pressing component 50, which includes a wire guiding seat 51 having a wire guiding groove 511 communicated with the guiding groove 311, a pressing block 52, and a pressing power member 53 for pressing the flat wire 200 located in the wire guiding groove 511 by the pressing block 52. The wire guiding seat 51 is located between the bending component 30 and the wire feeding device 10.

[0029] The above-mentioned flat bending device 100 for bending flat wires includes a wire feeding device 10 and a wire folding device 20. The wire folding device 20 includes a support frame 21, a bending component 30, a bending driving component 40, and a wire pressing component 50. The wire pressing component 50 includes a wire guiding seat 51 having a wire guiding groove 511 communicated with the guiding groove 311, a pressing block 52, and a pressing power member 53 for pressing the flat wire 200 located in the wire guiding groove 511 by the pressing block 52. The wire guiding seat 51 is located between the bending component 30 and the wire feeding device 10. In this way, by using the wire pressing component 50 to press the flat wire 200, it can prevent the flat wire 200 from warping during bending, which is beneficial to the bending forming. In addition, since the wire guiding seat 51 is located between the bending component 30 and the wire feeding device 10, that is, the wire guiding seat 51 is between the wire inlet of the fixed shaft component 31 and the wire feeding device 10. When the bending driving component 40 drives the bending component 32 to bend the flat wire 200 located outside the guiding groove 311 relative to the flat wire 200 inside around the wire outlet of the fixed shaft component 31, it will not interfere with the wire pressing component 50. Therefore, it is not only applicable to the bending forming of the flat wire 200 of the hairpin type winding, but also applicable to the forming of the flat wire 200 of the I-shaped clip winding, and the applicable range is wider.

[0030] See Figures 1 to 6 As shown in the figure, the flat bending device 100 for bending flat wires provided in this embodiment is used to receive the flat wire 200 with both ends cut off, and then bend and form the flat wire 200 into an I shape or a hairpin shape according to production requirements.

[0031] See Figure 1, the planar bending device 100 for bending flat wires provided in this embodiment includes a wire feeding device 10 and a wire bending device 20. The wire bending device 20 is arranged on one side of the wire feeding device 10 with a space therebetween.

[0032] See Figure 1 , the wire feeding device 10 provided in this embodiment is used to provide the flat wire 200 to be bent. The wire feeding device 10 receives the flat wire 200 with both ends cut off and feeds it into the wire bending device 20 along the length direction of the flat wire 200. In this embodiment, the wire feeding device 10 includes a wire clamping device 11 for clamping the flat wire 200 and a transfer device 12 for moving the wire clamping device 11 along the length direction of the flat wire 200. The transfer device 12 includes a transfer bracket 121, a transfer seat 122 slidably arranged on the transfer bracket 121, and a transfer power member 123 capable of driving the transfer seat 122 to move on the transfer bracket 121. The transfer power member 123 is, but not limited to, a motor. The wire clamping device 11 is supported on the transfer seat 122. Driven by the transfer power member 123, the wire clamping device 11 clamps one end of the flat wire 200 and moves along the length direction of the flat wire 200 towards the wire bending device 20. The wire clamping device 11 includes two jaws 111 that can be opened and closed and a wire clamping power member 112 capable of controlling the opening and closing actions of the two jaws 111. The wire clamping power member 112 is, but not limited to, a cylinder.

[0033] In other embodiments, the wire feeding device 10 and the wire bending device 20 can share a base for support.

[0034] See Figures 1 to 6 , the wire bending device 20 includes a support frame 21, a bending assembly 30, a bending drive assembly 40, and a wire pressing assembly 50. The bending assembly 30, the bending drive assembly 40, and the wire pressing assembly 50 are supported on the support frame 21.

[0035] See Figures 1 to 6, the support frame 21 includes a base plate 211 and a bottom plate 212. The base plate 211 is installed on the bottom plate 212 through support legs 213 and is kept at a predetermined height from the bottom plate 212. A fixing bracket 214 is installed on the base plate 211. The bending assembly 30 includes a fixed shaft member 31 having a guiding groove 311 for the flat wire 200 to pass through and a bending member 32 rotatably provided on the outer periphery of the fixed shaft member 31 with the axis of the fixed shaft member 31 as the axis; a bending driving assembly 40 for driving the bending member 32 to bend the flat wire 200 located outside the guiding groove 311 relative to the flat wire 200 inside around the wire outlet of the fixed shaft member 31. The bending assembly 30 and the bending driving assembly 40 are both fixedly installed on the fixing bracket 214, and the bending driving assembly 40 is located below the fixed shaft member 31 and fixedly connected to the bending member 32. In this embodiment, the bending driving assembly 40 includes but is not limited to a motor and a speed reducer. The fixing bracket 214 includes a backing plate 215 and a gantry 216. The backing plate 215 is installed on the base plate 211 by all existing fixing methods such as screws, and the gantry 216 is installed on the backing plate 215 by all existing fixing methods such as screws. The bending driving assembly 40 is installed on the bottom surface of the backing plate 215 by all existing fixing methods such as screws. A base plate through hole 211a for the bending driving assembly 40 to pass through is formed on the base plate 211. The rotation driving part of the bending driving assembly 40 is fixedly connected to the circular connection seat 217 by all existing fixing methods such as screws. The connection seat 217 is arranged substantially horizontally. The connection seat 217 can horizontally rotate around the center of the connection seat 217 under the drive of the bending driving assembly 40. The bending member 32 is fixedly connected to the connection seat 217 by all existing fixing methods such as screws. The fixed shaft member 31 is fixedly installed on the gantry 216 by all existing fixing methods such as screws. The fixed shaft member 31 has a circular cross-section and is coaxial with the connection seat 217. The guiding groove 311 is formed at the top of the fixed shaft member 31. In this way, under the drive of the bending driving assembly 40, the connection seat 217 rotates and drives the bending member 32 to rotate relative to the fixed shaft member 31 with the axis of the fixed shaft member 31 as the axis, so as to bend the flat wire 200 located outside the guiding groove 311 relative to the flat wire 200 inside around the wire outlet of the fixed shaft member 31.

[0036] See Figures 1 to 6 , the bending member 32 of this embodiment includes an annular seat member 321 sleeved on the fixed shaft member 31 and a roller member 322 installed on the annular seat member 321 and used to abut against the side wall of the flat wire 200. The annular seat member 321 is fixedly connected to the bending driving assembly 40. In this embodiment, the annular seat member 321 is fixedly connected to the circular connection seat 217 by all existing fixing methods such as screws. The annular seat member 321 is coaxial with the connection seat 217. The roller member 322 is rotatably installed on the annular seat member 321, and the number of the roller members 322 is but not limited to two.

[0037] See Figures 1 to 6 In this embodiment, the wire pressing assembly 50 includes a wire seat 51 having a wire groove 511 communicating with the guiding groove 311, a pressing block 52, and a pressing power member 53 for pressing the flat wire 200 located in the wire groove 511 by the pressing block 52. In this embodiment, the support frame 21 includes a top plate 218 located above the substrate 211. The wire seat 51 is fixedly installed on the top plate 218 by screws or any existing fixing means and is located between the bending assembly 30 and the wire feeding device 10. A wire groove 511 corresponding to the guiding groove 311 of the fixed shaft member 31 is formed in the wire seat 51, and the wire groove 511 extends along the extending direction of the guiding groove 311, and the bottom surfaces of the two are flush. The wire groove 511 has two longitudinal groove walls 512 parallel to each other. The pressing block 52 is slidably arranged on the support frame 21 in a direction perpendicular to the longitudinal groove walls 512. The pressing power member 53 is installed on the support frame 21 and connected to the pressing block 52. The wire seat 51 is provided with an opening 513 on the longitudinal groove walls 512 for the pressing block 52 to move into and out of the wire groove 511.

[0038] In other embodiments, the pressing block 52 and the pressing power member 53 may be installed outside the support frame 21.

[0039] See Figures 1 to 6 In this embodiment, the pressing block 52 has a connecting portion 521 and a pressing portion 522 connected to each other. The connecting portion 521 is connected to the pressing power member 53. The pressing portion 522 has a pressing surface 523 that abuts against the surface of the flat wire 200 and is parallel to the longitudinal groove walls 512. In this way, when the pressing block 52 is driven by the pressing power member 53 to move into the wire groove 511 from the opening 513 and presses the flat wire 200 against the other longitudinal groove wall 512 through the pressing surface 523, it can prevent the flat wire 200 from warping during bending, which may affect the forming effect of the flat wire 200.

[0040] From Figure 5 and Figure 6 it can be seen that in this embodiment, the pressing block 52 further includes a convex portion 524 protruding from the pressing surface 523. The convex portion 524 includes a limiting surface 525 located on its bottom surface and parallel to the bottom surface of the wire groove 511. In this way, by the limiting surface 525 of the convex portion 524 abutting against the flat wire 200, it can ensure that the flat wire 200 is located on the same plane and avoid affecting the forming effect of the flat wire 200 due to the uneven height of the flat wire 200.

[0041] See Figures 1 to 6, the wire pressing assembly 50 of this embodiment further includes a sliding mounting plate 54 slidably arranged on the support frame 21 and connected to the pressing power member 53. The connecting portion 521 of the pressing block 52 is fixedly connected to the sliding mounting plate 54 through a fixing block 57. In this embodiment, the sliding mounting plate 54 is slidably arranged on the support frame 21 through a slider 55, and the sliding mounting plate 54 is provided with a mounting hole 541 for the fixing bracket 214 to pass through.

[0042] From Figure 6 It can be seen that in this embodiment, a buffer limiting member 56 is provided on the support frame 21 for abutting against the sliding mounting plate 54 to limit the movement of the sliding mounting plate 54. The buffer limiting member 56 can be an elastic member or a damping member. It is mounted on the support frame 21 and located in the sliding direction of the sliding mounting plate 54, and limits the movement of the sliding mounting plate 54 by abutting against the sliding mounting plate 54.

[0043] See Figures 1 to 6 , a receiving cover plate 219 for abutting against the flat wire 200 and allowing the flat wire 200 to slide is provided on the support frame 21. The top surface of the receiving cover plate 219 is flush with the bottom surface of the guiding groove 311. In this embodiment, the receiving cover plate 219 is provided with a receiving through hole for the fixing shaft member 31 to pass through.

[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plane bending device for bending flat wires, characterized in that: The invention comprises a wire feeding device for providing a flat wire to be bent and a wire bending device for receiving the flat wire and bending the flat wire, wherein the wire bending device and the wire feeding device are arranged alternately; the wire bending device comprises a support frame and the following components supported on the support frame: A bending assembly, comprising a fixed shaft component having a guide groove for the flat wire to pass through, and a bending component rotatably arranged on the outer periphery of the fixed shaft component with the axis of the fixed shaft component as an axis; A bending drive assembly, used for driving the bending component to bend the flat wire outside the guide groove relative to the flat wire inside around the fixed shaft component; The wire pressing assembly comprises a wire seat having a wire groove connected to the guide groove, a pressing block and a pressing power member for causing the pressing block to press the flat wire in the wire groove. The wire seat is located between the bending assembly and the wire feeding device.

2. The plane bending device for bending flat wire according to claim 1, characterized in that: The wire groove has two longitudinal groove walls parallel to each other, the top pressure block is slidably arranged on the support frame, and the wire seat is provided with an opening on the longitudinal groove wall for the top pressure block to move into and out of the wire groove.

3. The plane bending device for bending a flat wire according to claim 2, characterized in that: The pressing block comprises a connecting portion and a pressing portion which are connected to each other, wherein the connecting portion is connected to a pressing power member, and the pressing portion comprises a pressing surface which abuts against the surface of the flat wire and is parallel to the longitudinal groove wall.

4. The plane bending device for bending a flat wire according to claim 3, characterized in that: The pressing block further comprises a convex portion convexly arranged on the pressing surface, and the convex portion comprises a limiting surface located on its bottom surface and parallel to the bottom surface of the wire groove.

5. The plane bending device for bending a flat wire according to claim 3, characterized in that: The wire pressing assembly also includes a sliding mounting plate which is slidably disposed on the support frame and connected to the pressing power member, and the connecting portion of the pressing block is fixedly connected to the sliding mounting plate via a fixing block.

6. The plane bending device for bending a flat wire according to claim 5, characterized in that: The support frame is provided with a buffer limiter for abutting against the sliding mounting plate to limit the movement of the sliding mounting plate.

7. The plane bending device for bending a flat wire according to any one of claims 1 to 6, characterized in that: The support frame includes a base plate and a fixed bracket installed on the base plate. The fixed shaft component and the bending drive assembly are both fixed on the fixed bracket. The bending drive assembly is located below the fixed shaft component and is fixedly connected to the bending component.

8. The plane bending device for bending a flat wire according to claim 7, characterized in that: The bending component comprises an annular seat component sleeved on the fixed shaft component and a roller component installed on the annular seat component and used to abut against the side wall of the flat wire. The annular seat component is fixedly connected to the bending drive assembly.

9. The plane bending device for bending a flat wire according to any one of claims 1 to 6, characterized in that: The support frame is provided with a receiving cover plate for contacting with the flat wire and allowing the flat wire to slide, and the top surface of the receiving cover plate is flush with the bottom surface of the guide groove.

10. The plane bending device for bending a flat wire according to any one of claims 1 to 6, characterized in that: The wire feeding device comprises a wire clamping device for clamping the flat wire and a conveying device for moving the wire clamping device along the length direction of the flat wire.

Images