Coil profiling module for electromagnetic bearing stator

Abstract

The utility model relates to the technical field of profiling modules, and discloses a coil profiling module for an electromagnetic bearing stator, which comprises two pressure plates, two chucks and two step shafts, the two pressure plates, the two chucks and the two step shafts are symmetrically arranged up and down, the centers of the two chucks are respectively provided with a step hole, and the step shafts are respectively positioned in the step holes. Pressing rings are mounted on the sides, close to each other, of the pressing discs; through holes are formed in the centers of the pressure plates, first guide rods are inserted into the through holes, first springs are fixedly mounted between one ends of the first guide rods and the pressure plates, the first guide rods are sleeved with the first springs, and the other ends of the first guide rods are fixedly assembled with the step shafts; a reset assembly is arranged between the pressing plates, a cylinder base is fixedly installed on the lower side of the lower side pressing plate, and a positioning assembly is arranged in the cylinder base. According to the utility model, the circumferential surface of the inner side, the circumferential surface of the outer side, the upper end surface and the lower end surface of the coil can be pressed and arranged step by step during downward pressing, and the stress of the coil can be released step by step, so that the stator forming precision is higher and the forming effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of press mold assemblies, in particular to a coil press mold assembly for an electromagnetic bearing stator. Background Art

[0002] As a new type of support bearing that uses electromagnetic principles for magnetic levitation, electromagnetic bearings are a new type of high-performance bearings. They support loads or suspend rotors through magnetic field forces, thereby achieving rotation without mechanical contact. This type of bearing has many advantages, such as low mechanical wear, low energy consumption, low noise, long life, no need for lubrication, no oil pollution, etc. It is particularly suitable for special environments such as high speed and vacuum.

[0003] The structure of the electromagnetic bearing mainly includes an annular protective cover and a stator (the stator is composed of an iron core, a coil and other structures). During the stator assembly process, each stator is distributed with multiple sets of core slots, and the coil is wound on the core through the core slots. The shape consistency of each coil after winding is poor, which will not only affect the assembly accuracy between parts, but also affect the comprehensiveness of subsequent insulation treatment and electrical parameters. The coil pressing module currently used is mainly composed of two upper and lower pressure plates, which act on the coil at the same time during pressing, which is not conducive to the gradual release of coil stress and has a poor forming effect.

[0004] Therefore, in order to solve the above problems, a coil pressing die set for an electromagnetic bearing stator is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a coil pressing die set for an electromagnetic bearing stator, which can gradually complete the pressing of the coil and achieve a better forming effect, thereby solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a coil forming die set for an electromagnetic bearing stator, comprising two pressure plates, two chucks and two step shafts symmetrically arranged in an upper and lower direction, step holes are provided at the centers of the two chucks, the step shafts are respectively located in the step holes, and forming rings are installed on the sides of the pressure plates close to each other, and the forming rings are inserted between the step holes and the step shafts when in use; through holes are provided at the centers of the pressure plates, first guide rods are inserted in the through holes, a first spring is fixedly installed between one end of the first guide rod and the pressure plate, the first spring is sleeved on the first guide rod, and the other end of the first guide rod is fixedly assembled with the step shafts respectively; a reset assembly is provided between the pressure plates, a cylinder seat is fixedly installed on the lower side of the lower pressure plate, and a positioning assembly is provided inside the cylinder seat.

[0007] Specifically, the ends of the pressing rings that are close to each other are provided with coil pressing grooves, and the coil pressing grooves are evenly distributed around the circumference.

[0008] Specifically, the reset assembly includes a second guide rod and a second spring. Guide holes are opened on the left and right sides of the lower pressure plate, and the second guide rod is plugged into the guide holes. The upper end of the second guide rod is fixedly assembled with the upper pressure plate, and the side wall of the chuck is evenly fixedly mounted with a guide sleeve, and the guide sleeve is slidably assembled with the second guide rod; a second spring is fixedly mounted between the guide sleeves on the same second guide rod, a second spring is fixedly mounted between the upper guide sleeve and the upper pressure plate, and a second spring is fixedly mounted between the lower guide sleeve and the lower pressure plate, and the second springs are both sleeved on the second guide rod.

[0009] Specifically, the positioning assembly includes a turntable and a hook. The lower end of the torsion rotation pair is fixedly installed at the inner center of the cylinder seat through a support beam, the upper end of the torsion rotation pair is fixedly installed with a turntable, and hooks are fixedly installed on the left and right sides of the turntable. The hook on the left is located on the front side of the second guide rod, and the hook on the right is located on the rear side of the second guide rod. The hook is provided with a positioning hole, and a limiting ring is fixedly installed on the lower end of the second guide rod. When the second guide rod is plugged into the positioning hole for assembly, the limiting ring abuts against the lower side of the hook.

[0010] Furthermore, the top diameter of the positioning hole is larger than the bottom diameter.

[0011] Furthermore, a slot is formed on the side wall of the cartridge seat, one end of a shifting rod is fixedly mounted on the side wall of the turntable, and the other end of the shifting rod passes through the slot.

[0012] Optionally, the number of the reset components on each side is one that is centrally disposed or two that are evenly distributed front to back, and correspondingly, the number of the hooks on each side is also one that is centrally disposed or two that are evenly distributed front to back.

[0013] Specifically, a top cylinder is fixedly mounted on the upper side of the upper pressure plate.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the pressure plate, the clamping plate and the stepped shaft connected by the reset assembly and other structures can gradually press the inner circumferential surface, the outer circumferential surface and the upper and lower end surfaces of the coil when pressing down, and the arranged positioning assembly can also conveniently lock and release the reset assembly, which can gradually release the stress of the coil, so that the stator molding accuracy is higher and the molding effect is better;

[0015] While preventing damage from bumps during transfer, it also provides a clamping basis for subsequent coil insulation varnish dipping and baking solidification, thereby improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic front view of the structure of the utility model;

[0017] Figure 2 It is a schematic cross-sectional view of the structure of the pressure plate of the utility model;

[0018] Figure 3 It is a schematic cross-sectional view of the structure of the utility model when two pressure plates are pressed tightly;

[0019] Figure 4 It is a schematic cross-sectional view of the structure of the cylinder seat of the utility model;

[0020] Figure 5 It is a schematic three-dimensional diagram of the structure of the lower pressure plate of the utility model;

[0021] Figure 6 It is a schematic three-dimensional diagram of the structure of the turntable of the utility model.

[0022] In the figure: 1 first spring, 2 reset assembly, 21 second guide rod, 22 guide sleeve, 23 second spring, 3 pressure ring, 4 pressure plate, 5 top cylinder, 6 chuck, 7 step shaft, 8 first guide rod, 9 positioning assembly, 91 lever, 92 turntable, 93 positioning hole, 94 hook, 95 torsion rotation pair, 96 limit ring, 97 notch, 10 step hole, 11 cylinder seat, 12 coil pressure groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0024] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The utility model provides a coil forming die set for an electromagnetic bearing stator, comprising two pressure plates 4, two chucks 6 and two step shafts 7 which are symmetrically arranged in an upper and lower direction. A step hole 10 is provided at the center of the two chucks 6. The step hole 10 is composed of a small diameter hole and a large diameter hole which are connected at the ends, and the two large diameter holes are located on the side where the chucks 6 are close to each other; the step shafts 7 are respectively located in the step holes 10, and the step shaft 7 is composed of a small diameter shaft and a large diameter shaft which are fixed at the ends, and the small diameter shaft is located on the side where the step shafts 7 are close to each other; a forming ring 3 is installed on the side where the pressure plates 4 are close to each other, and the forming ring 3 is inserted between the step hole 10 and the step shaft 7 when in use, so that a space for pressing the stator is formed between the upper chuck 6, the forming ring 3, the step shaft 7 and the lower chuck 6, the forming ring 3, the step shaft 7.

[0025] A through hole is opened at the center of the pressure plate 4, and a first guide rod 8 is inserted in the through hole. A first spring 1 is fixedly installed between one end of the first guide rod 8 and the pressure plate 4. The first spring 1 is sleeved on the first guide rod 8, and the other end of the first guide rod 8 is fixedly assembled with the step shaft 7 respectively; the first spring 1 can exert a force on the two step shafts 7 to move closer to each other after being transmitted by the first guide rod 8.

[0026] A reset assembly 2 is arranged between the pressure plates 4, and the reset assembly 2 enables the two pressure plates 4 and the two chucks 6 to have a force moving away from each other; a cylinder seat 11 is fixedly installed on the lower side of the lower pressure plate 4, and when the cylinder seat 11 is placed on the working platform of the punching machine, it plays a supporting role and can also provide sufficient activity space for the internal components. A positioning assembly 9 is arranged inside the cylinder seat 11, and the positioning assembly 9 is used to lock the flexion and extension posture of the reset assembly 2.

[0027] Specifically, Figure 5 As shown, the ends of the pressing ring 3 close to each other are provided with coil pressing grooves 12, and the coil pressing grooves 12 are evenly distributed on the circumference; when the coil pressing grooves 12 are pressed tightly against the coil, the bending parts of the stator coil can also be further pressed to increase the range of pressing finishing.

[0028] Specifically, the reset assembly 2 includes a second guide rod 21 and a second spring 23. Guide holes are provided on the left and right sides of the lower pressure plate 4. The second guide rod 21 is plugged into the guide holes. The upper end of the second guide rod 21 is fixedly assembled with the upper pressure plate 4. The side wall of the chuck 6 is evenly fixedly installed with a guide sleeve 22. The guide sleeve 22 is slidably assembled with the second guide rod 21. A second spring 23 is fixedly installed between the guide sleeves 22 on the same second guide rod 21, a second spring 23 is fixedly installed between the upper guide sleeve 22 and the upper pressure plate 4, and a second spring 23 is fixedly installed between the lower guide sleeve 22 and the lower pressure plate 4. A second spring 23 is fixedly installed and is sleeved on the second guide rod 21; the second spring 23 enables the guide sleeves 22 on the same second guide rod 21, the upper guide sleeve 22 and the upper pressure plate 4, and the lower guide sleeve 22 and the lower pressure plate 4 to have a force moving away from each other. When the upper pressure plate 4 is pressed down, the second spring 23 is compressed and stores energy, and the second guide rod 21 can move along the guide hole, and the guide sleeve 22 moves along the second guide rod 21 to ensure that the chuck 6, the pressure ring 3, and the step shaft 7 can always maintain a parallel posture with each other.

[0029] Specifically, Figure 6As shown, the positioning assembly 9 includes a turntable 92 and a hook 94. The lower end of the torsion rotating pair 95 is fixedly installed at the inner center of the cylinder seat 11 through a support beam, and the turntable 92 is fixedly installed at the upper end of the torsion rotating pair 95. The torsion rotating pair 95 is an existing component composed of a column pin, a torsion spring and two rotating seats. The two rotating seats are rotatably assembled by the column pin, and the torsion spring is sleeved on the column pin and fixedly assembled with the rotating seats at both ends, so that the turntable 9 has a torsion for clockwise rotation.

[0030] Hooks 94 are fixedly installed on the left and right sides of the turntable 92, the left hook 94 is located on the front side of the second guide rod 21, and the right hook 94 is located on the rear side of the second guide rod 21. The hook 94 is provided with a positioning hole 93, and a limiting ring 96 is fixedly installed on the lower end of the second guide rod 21; when the second guide rod 21 moves downward to the bottom, the second guide rod 21 is plugged and assembled with the positioning hole 93, and the limiting ring 96 abuts against the lower side of the hook 94, so that the position of the second guide rod 21 can be fixed.

[0031] Furthermore, the top diameter of the positioning hole 93 is larger than the bottom diameter, which makes it easier for the limiting ring 96 to pass downward through the positioning hole 93 .

[0032] Furthermore, a slot 97 is provided on the side wall of the cartridge holder 11, and one end of a lever 91 is fixedly mounted on the side wall of the turntable 92, and the other end of the lever 91 passes through the slot 97; the lever 91 can rotate together with the turntable 92, and after the turntable 92 rotates clockwise, the lever 91 swings to the left and abuts against the left end of the slot 97, and after swinging the lever 91 to the right by hand, the turntable 92 can be temporarily swung counterclockwise, and the turntable 92 can be reset clockwise after releasing the hand.

[0033] The number of reset assemblies 2 that can be selected according to the size of the pressure plate 4 is as follows: one reset assembly 2 on each side is centrally arranged or two are evenly distributed front and back, and accordingly, one hook 94 on each side is also centrally arranged or two are evenly distributed front and back; to ensure that the reset ability of the reset assembly 2 can support the pressure plate 4 and the chuck 6, and the positioning assembly 9 can lock each second guide rod 21.

[0034] Specifically, a top cylinder 5 is fixedly installed on the upper side of the upper pressure plate 4. When the punch of the hydraulic press acts downward, it will act on the upper pressure plate 4 through the top cylinder 5 to avoid damaging the first guide rod 8 inside the top cylinder 5.

[0035] Working principle:

[0036] The cylinder seat 11 is placed on the working platform of the hydraulic press. During the pressing process, the stator with the coil wound is placed on the step shaft 7 and the chuck 6 on the lower side. The punch of the hydraulic press gradually presses down the top cylinder 5, so that each pair of pressure plates 4, chucks 6 and step shafts 7 move closer to each other. The two closest step shafts 7 are gradually inserted into the center of the circumferentially distributed coils to pre-arrange the inner circumferential surface of the coil, and then the two chucks 6 pre-arrange the outer circumferential surface of the coil through the step hole 10; and when the pressing ring 3 is gradually inserted between the step hole 10 and the step shaft 7, the upper and lower end surfaces of the coil can be pre-arranged.

[0037] Continue to press down until the chuck 6, the stepped shaft 7 and the pressure plate 4 are tightly pressed against each other. At this time, the limit position is reached and the coil profiling process is completed. At the same time, the limit ring 96 passes downward through the positioning hole 93 and engages with the reset hook 94, thereby positioning the reset component 2.

[0038] It can provide a clamping basis for the subsequent coil insulation varnish dipping and baking solidification to ensure the stable forming of the coil. After the entire module is cooled, the lever 91 can be pushed to the left to release the positioning of the reset component 2, and then the pressure plate 4, the chuck 6 and the step shaft 7 and other structures can be reset to take out the finished stator.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A coil pressing die set for an electromagnetic bearing stator, characterized in that: It comprises two pressure plates (4), two clamping plates (6) and two stepped shafts (7) which are symmetrically arranged in an upper and lower direction. The centers of the two clamping plates (6) are provided with stepped holes (10). The stepped shafts (7) are respectively located in the stepped holes (10). The sides of the pressure plates (4) close to each other are respectively provided with press rings (3). The press rings (3) are inserted between the stepped holes (10) and the stepped shafts (7) when in use. A through hole is provided at the center of each of the pressure plates (4), a first guide rod (8) is inserted into each of the through holes, a first spring (1) is fixedly installed between one end of the first guide rod (8) and the pressure plate (4), the first spring (1) is sleeved on the first guide rod (8), and the other end of the first guide rod (8) is fixedly assembled with the step shaft (7); A reset assembly (2) is arranged between the pressure plates (4), a cylinder seat (11) is fixedly mounted on the lower side of the pressure plate (4), and a positioning assembly (9) is arranged inside the cylinder seat (11).

2. The coil pressing die set for an electromagnetic bearing stator according to claim 1, characterized in that: Coil pressing grooves (12) are formed at the ends of the pressing rings (3) that are close to each other, and the coil pressing grooves (12) are evenly distributed around the circumference.

3. The coil pressing die set for an electromagnetic bearing stator according to claim 1, characterized in that: The reset assembly (2) comprises a second guide rod (21) and a second spring (23). The left and right sides of the lower pressure plate (4) are provided with guide holes, and the second guide rod (21) is plugged into the guide holes. The upper end of the second guide rod (21) is fixedly assembled with the upper pressure plate (4). The side wall of the chuck (6) is evenly fixedly mounted with a guide sleeve (22), and the guide sleeve (22) is slidably assembled with the second guide rod (21). A second spring (23) is fixedly mounted between the guide sleeves (22) on the same second guide rod (21), a second spring (23) is fixedly mounted between the upper guide sleeve (22) and the upper pressure plate (4), and a second spring (23) is fixedly mounted between the lower guide sleeve (22) and the lower pressure plate (4), and the second spring (23) is sleeved on the second guide rod (21).

4. The coil pressing die set for an electromagnetic bearing stator according to claim 3, characterized in that: The positioning assembly (9) comprises a rotating disk (92) and a hook (94); the lower end of a torsion rotating pair (95) is fixedly mounted at the inner center of the cylinder seat (11) via a support beam; the rotating disk (92) is fixedly mounted on the upper end of the torsion rotating pair (95); hooks (94) are fixedly mounted on the left and right sides of the rotating disk (92); the left hook (94) is located at the front side of the second guide rod (21), and the right hook (94) is located at the rear side of the second guide rod (21); a positioning hole (93) is formed in the hook (94); a limiting ring (96) is fixedly mounted on the lower end of the second guide rod (21); when the second guide rod (21) is plugged and assembled with the positioning hole (93), the limiting ring (96) abuts against the lower side of the hook (94).

5. The coil pressing die set for the stator of an electromagnetic bearing according to claim 4, characterized in that: The top diameter of the positioning hole (93) is larger than the bottom diameter.

6. The coil pressing die set for an electromagnetic bearing stator according to claim 4, characterized in that: A notch (97) is formed on the side wall of the cartridge seat (11), one end of a lever (91) is fixedly mounted on the side wall of the rotating disk (92), and the other end of the lever (91) passes through the notch (97).

7. The coil pressing die set for an electromagnetic bearing stator according to claim 4, characterized in that: The reset assembly (2) on each side is one centrally arranged or two evenly distributed front and back, and correspondingly, the hooks (94) on each side are also one centrally arranged or two evenly distributed front and back.

8. The coil pressing die set for an electromagnetic bearing stator according to claim 1, characterized in that: A top cylinder (5) is fixedly mounted on the upper side of the upper pressure plate (4).

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