A superimposed magnetic clamp

Abstract

The application discloses a superposed magnetic clamp, which comprises an upper clamp plate, a lower clamp plate, limiting columns, pressing plates, clamp plate buckles and a plurality of limiting columns arranged on the upper surface of the lower clamp plate, the upper surface of the lower clamp plate is divided into four magnet placing areas by the limiting columns, the pressing plates are arranged at the bottom of the upper clamp plate, the four pressing plates and the magnet placing areas are matched with each other, the clamp plate buckles are arranged between the upper clamp plate and the lower clamp plate and are used for controlling the closing of the upper clamp plate and the lower clamp plate. The coated magnetic steel plates are placed in the four magnet placing areas, the position is positioned by the limiting columns to prevent movement, then the lower clamp plate is pressed down by the clamp plate buckles to press the superposed magnet, the magnetic steel plates can be ensured to be closely combined with the glue layer, the gap and the air bubble are eliminated, the bonding strength and the heat conductivity are improved, the magnetic sheet displacement is prevented, the solidification deformation is reduced, the magnetic circuit performance is optimized, and the stability and the reliability of the overall structure are enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to a clamp device, in particular to a superimposed magnetic clamp. BACKGROUND

[0002] Nd-Fe-B permanent magnet is widely used in industrial motor, automobile motor and wind power, generator and other fields. For high-speed running permanent magnet motor, rotor magnet loss has become a key factor affecting its reliable operation. When rotating at high speed, the eddy current loss generated by the magnet increases the temperature of the rotor, which can cause demagnetization of the permanent magnet. In order to reduce the eddy current loss of the magnetic steel, multiple pieces of Nd-Fe-B permanent magnet are bonded together to reduce the eddy current loss of the magnetic steel. The traditional method is to coat glue between the magnetic steels and then send them for baking. In this way, there may be gaps between the un-compacted magnetic steels or uneven distribution of glue, and after solidification, the bonding surface may not be in sufficient contact, resulting in insufficient bonding strength and loss of magnetic properties. Therefore, it is necessary to propose a superimposed magnetic clamp. SUMMARY

[0003] The purpose of the present application is to solve the problems in the background art and provide a superimposed magnetic clamp.

[0004] The above technical purpose of the present application is achieved by the following technical scheme:

[0005] A superimposed magnetic clamp comprises an upper clamp plate, a lower clamp plate, a limiting column, a pressing plate and a clamp lock. A plurality of limiting columns are arranged on the upper surface of the lower clamp plate. The upper surface of the lower clamp plate is divided into four magnet placement areas by the limiting columns. The pressing plate is arranged at the bottom of the upper clamp plate. The four pressing plates and the magnet placement areas cooperate with each other. The clamp lock is arranged between the upper clamp plate and the lower clamp plate to control the closing of the upper clamp plate and the lower clamp plate.

[0006] The present application places multiple pieces of magnetic steel coated with glue in the four magnet placement areas, positions and prevents movement through the limiting columns, and then presses the superimposed magnet by driving the lower clamp plate down through the clamp lock. This can ensure that the magnetic steel and the glue layer are tightly bonded, eliminate gaps and bubbles, improve the bonding strength and thermal conductivity, prevent the displacement of the magnetic sheet, reduce solidification deformation, optimize the magnetic circuit performance, and enhance the stability and reliability of the overall structure.

[0007] Preferably, a compression spring is arranged between the pressing plate and the upper clamp plate. The elastic deformation of the compression spring balances the local stress, ensures uniform stress on the bonding surface, reduces bubbles and voids, uniformly applies pressure, and automatically adjusts the pressure to adapt to changes in glue layer thickness or thermal expansion and contraction, thereby avoiding damage to the magnetic steel caused by overpressure and achieving dynamic pressure compensation.

[0008] Preferably, the clamping plate lock comprises a fixing seat, operating rods, a transition plate and a connecting rod, the fixing seat is fixed on the lower clamping plate, two operating rods are arranged on the two sides of the fixing seat, the ends of the operating rods are hinged to the fixing seat, a groove is formed in the top of the fixing seat, the end of the connecting rod is arranged in the groove and is hinged to the fixing seat, the top end of the connecting rod is fixedly connected to the upper clamping plate, one end of the transition plate is hinged to the middle part of the operating rod, and the other end is hinged to the middle part of the connecting rod.

[0009] The present application can realize the compression function by lifting and returning the operating rod and the upper clamping plate, and the operation is convenient.

[0010] Preferably, the limiting column between the two adjacent magnet placement areas is a diameter-adjustable column structure, the diameter-adjustable column structure comprises an elastic cylinder, an arc-shaped supporting piece, a fixed disc, a sliding rod, the fixed disc is provided with three or more than three sliding grooves in the circumferential direction, the sliding grooves are arranged in the radial direction of the fixed disc, the sliding rod is slidingly arranged in the sliding grooves, the arc-shaped supporting piece is fixed at the end of the sliding rod, the elastic cylinder is arranged outside the arc-shaped supporting piece, the upper surface of the fixed disc is further provided with a rotating disc and a fixed shaft, the upper surface of the starting end of the sliding rod is provided with a guide column, the rotating disc is provided with an arc-shaped limiting groove at the position opposite to the guide column, the guide column slides on the arc-shaped limiting groove, the top of the fixed shaft is rotatably connected to the rotating disc through a bearing, the bottom of the fixed shaft is fixed on the lower clamping plate, and the fixed disc is fixed on the fixed shaft.

[0011] The present application can realize the compression function by lifting and returning the operating rod and the upper clamping plate, and the operation is convenient.

[0012] Preferably, the cross section of the sliding groove is T-shaped, the cross section of the sliding groove is that the bottom width is greater than the opening width, the sliding rod is arranged at the bottom of the sliding groove, and the guide column is arranged at the opening of the sliding groove, so that the sliding rod will not fall out of the sliding groove.

[0013] Preferably, the upper surface of the rotating disc is provided with a rotating shaft in the middle, the top of the rotating shaft is fixedly provided with a knob, and the diameter of the rotating shaft is greater than that of the bearing, so that the rotating disc can be manually rotated through the knob.

[0014] Preferably, the upper surface of the fixed disc is provided with a plurality of positioning holes along the circumferential direction, the top of the knob is provided with an extension rod, the bottom of the extension rod is provided with a positioning bead matched with the positioning hole, a limiting groove is arranged in the extension rod, and a jacking spring is arranged in the limiting groove and fixedly connected with the inner top of the limiting groove at one end and with the positioning bead at the other end.

[0015] The cooperation of the positioning bead, the jacking spring and the positioning hole enables the positioning bead to be clamped into the positioning hole under the elastic force of the jacking spring after the rotation of the knob, and the rotation of the knob can be realized during the rotation process due to the compression of the jacking spring, so that the rotation and fixation of the knob are ensured.

[0016] Preferably, four compression springs are arranged in an array on each pressing plate, and the stress is uniform.

[0017] Preferably, the end of the operating rod is provided with a silica gel handle, and the operation is facilitated.

[0018] In summary, the present application has the following advantages:

[0019] 1. The present application places the coated multiple magnetic steels in the four magnet placing areas, positions and prevents movement through the limiting column, and then drives the lower clamping plate to press the stacked magnets through the clamping plate lock, so as to ensure that the magnetic steels are closely attached to the glue layer, eliminate gaps and bubbles, improve the bonding strength and thermal conductivity, prevent the displacement of the magnetic sheets, reduce the solidification deformation, optimize the magnetic circuit performance, and enhance the stability and reliability of the overall structure.

[0020] 2. The present application balances the local stress through the elastic deformation of the compression spring, ensures that the bonding surface is uniformly stressed, reduces bubbles and voids, uniformly applies pressure, and automatically adjusts the pressure of the spring to adapt to the thickness change or thermal expansion and cold contraction of the glue layer, avoids damage to the magnetic steel caused by overpressure, and achieves the effect of dynamic pressure compensation.

[0021] 3. The present application rotates the rotating disc, thereby driving the guide column to slide in the arc-shaped guide groove, driving the sliding rod to move in the direction of approaching or moving away from the center of the circle in the sliding groove, thereby expanding or not expanding the elastic cylinder, achieving the effect of adjusting the diameter of the elastic cylinder, and enabling the elastic cylinder to always limit the magnetic steel when facing magnetic steels of different sizes. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the whole application;

[0023] Figure 2 is a side view schematic diagram of the clamping plate lock of the present application;

[0024] Figure 3 is a top view schematic diagram of the whole application;

[0025] Figure 4 It is an overall schematic diagram of the diameter-adjustable column structure of the present invention;

[0026] Figure 5 This is an overall schematic diagram of the diameter-adjustable column structure of the present invention without the elastic cylinder;

[0027] Figure 6 is a schematic diagram of a fixed disk of the present invention;

[0028] Figure 7 is a schematic diagram of the slide bar and the arc-shaped support piece of the present invention;

[0029] Figure 8 It is a cross-sectional schematic diagram of the connection between the knob, the extension rod and the rotating disk of the present invention. DETAILED DESCRIPTION

[0030] The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the embodiments as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0031] The present invention will be described in detail below with reference to the accompanying drawings using embodiments.

[0032] Example

[0033] like Figures 1-3 As shown, a superimposed magnetic clamp includes an upper clamping plate 1, a lower clamping plate 2, a limiting column 3, a pressure plate 4, and a clamping plate lock 5. Several of the limiting columns 3 are arranged on the upper surface of the lower clamping plate 2, and the upper surface of the lower clamping plate 2 is divided into four magnet placement areas 21 by the limiting columns 3. The pressure plate 4 is arranged at the bottom of the upper clamping plate 1. The four pressure plates 4 and the magnet placement areas cooperate with each other. The clamping plate lock 5 is arranged between the upper clamping plate 1 and the lower clamping plate 2 to control the closing of the upper clamping plate 1 and the lower clamping plate 2. A compression spring 6 is provided between the pressure plate 4 and the upper clamping plate 1. The clamping plate lock 5 includes a fixing seat 51, an operating rod 52, and a transition plate 53. , connecting rod 54, the fixed seat 51 is fixed on the lower splint 2, the two operating rods 52 are arranged on both sides of the fixed seat 51, the end of the operating rod 52 is hinged to the fixed seat 51, and the top of the fixed seat 51 is provided with a groove 511. The end of the connecting rod 54 is arranged in the groove 511 and is hinged to the fixed seat 51. The top of the connecting rod 54 is fixedly connected to the upper splint 1, one end of the transition plate 53 is hinged to the middle part of the operating rod 52, and the other end is hinged to the middle part of the connecting rod 54. Each pressure plate 4 is provided with an array of four compression springs 6, and the end of the operating rod 52 is provided with a silicone handle 520.

[0034] like Figures 4-7As shown, the limiting column 3 between the two adjacent magnet placement areas 21 is a diameter-adjustable column structure 7, which comprises an internally hollow elastic cylinder 71, an arc-shaped support sheet 72, a fixed disc 73, a sliding rod 74, the fixed disc 73 is provided with three or more than three sliding grooves 731 along the circumferential direction, the sliding grooves 731 are arranged along the radial direction of the fixed disc 73, the sliding rod 74 is slidingly arranged in the sliding grooves 731, the arc-shaped support sheet 72 is fixed at the end of the sliding rod 74, the elastic cylinder 71 is arranged outside the arc-shaped support sheet 72, the upper surface of the fixed disc 73 is further provided with a rotating disc 75 and a fixed shaft 76, the upper surface of the starting end of the sliding rod 74 is provided with a guide column 741, the rotating disc 75 is provided with an arc-shaped limiting groove 751 at the position opposite to the guide column 741, the guide column 741 slides on the arc-shaped limiting groove 751, the top of the fixed shaft 76 is rotationally connected with the rotating disc 75 through a bearing, the bottom of the fixed shaft 76 is fixed on the lower clamping plate 2, the fixed disc 73 is fixed on the fixed shaft 76, the cross section of the sliding groove 731 is T-shaped, the cross section of the sliding groove 731 is that the bottom width is greater than the opening width, the sliding rod 74 is arranged at the bottom of the sliding groove 731, and the guide column 741 is arranged at the opening of the sliding groove 731.

[0035] As shown in the figure, Figure 8 The upper surface of the rotating disc 75 is provided with an internally hollow rotating shaft 77 in the middle, the top of the rotating shaft 77 is fixed with a knob 78, the diameter of the rotating shaft is greater than the diameter of the bearing, the upper surface of the fixed disc 73 is provided with a plurality of positioning holes 730 along the circumferential direction, the top of the knob 78 is provided with an extension rod 781, the bottom of the extension rod 781 is provided with a positioning bead 782 which is matched with the positioning hole 730, the extension rod 781 is internally provided with a limiting groove 783, the limiting groove 783 is internally provided with a jacking spring 784, one end of the jacking spring 784 is fixedly connected with the inner top of the limiting groove 783, and the other end is fixedly connected with the positioning bead 782.

[0036] Working principle: as Figures 1-8As shown, the upper clamping plate 1 and the lower clamping plate 2 are opened, and the multiple pieces of magnetic steel coated with glue are placed in the four magnet placement areas 21. When it is found that the magnetic steel is too far away from the limiting column 3, the rotation of the rotating disk 75 drives the guide column 741 to slide in the arc guide groove, thereby driving the slide rod 74 to move along the direction away from the center of the circle in the slide groove 731, thereby expanding the elastic cylinder to expand the diameter of the elastic cylinder 71; when it is found that the magnetic steel 10 is too close to the limiting column 3 and the magnetic steel 10 cannot be placed, the rotation of the rotating disk 75 drives the guide column 741 to slide in the arc guide groove, thereby driving the slide rod 74 to move along the direction away from the center of the circle in the slide groove 731, thereby expanding the elastic cylinder to expand the diameter of the elastic cylinder 71; The column 741 slides in the arc-shaped guide groove, thereby driving the slide rod 74 to move along the direction close to the center of the circle in the slide groove 731, thereby shrinking the elastic tube, thereby reducing the diameter of the elastic tube 71, so that the elastic tube can always be close to the magnet. Then, the operating rod 52 is lifted upward to drive the upper splint 1 to press the lower splint 2, which can ensure that the magnet and the glue layer are closely fitted, eliminate gaps and bubbles, improve bonding strength and thermal conductivity, and at the same time prevent displacement of the magnetic sheet, reduce curing deformation, optimize magnetic circuit performance, and enhance the stability and reliability of the overall structure.

Claims

1. A superimposed magnetic clamp, characterized in that, The invention comprises an upper splint (1), a lower splint (2), a limiting column (3), a pressure plate (4), and a splint lock (5), wherein a plurality of the limiting columns (3) are arranged on the upper surface of the lower splint (2), and the upper surface of the lower splint (2) is divided into four magnet placement areas (21) by the limiting columns (3); the pressure plate (4) is arranged at the bottom of the upper splint (1), and the four pressure plates (4) cooperate with the magnet placement areas; the splint lock (5) is arranged between the upper splint (1) and the lower splint (2) and is used to control the closing of the upper splint (1) and the lower splint (2); The limiting column (3) between two adjacent magnet placement areas (21) is a diameter-adjustable column structure (7), the diameter-adjustable column structure (7) includes an elastic tube (71) with a hollow interior, an arc-shaped support sheet (72), a fixed disk (73), and a slide rod (74), the fixed disk (73) is provided with more than three slide grooves (731) along the circumferential direction, the slide grooves (731) are arranged along the radial direction of the fixed disk (73), the slide rod (74) is slidably arranged in the slide grooves (731), the arc-shaped support sheet (72) is fixed to the end of the slide rod (74), and the elastic tube (71) is arranged on the outside of the arc-shaped support sheet (72); The upper surface of the fixed disk (73) is further provided with a rotating disk (75) and a fixed shaft (76); the upper surface of the starting end of the slide rod (74) is provided with a guide column (741); an arc-shaped limiting groove (751) is provided at a position where the rotating disk (75) and the guide column (741) are opposite to each other; the guide column (741) slides on the arc-shaped limiting groove (751); the top of the fixed shaft (76) is rotatably connected to the rotating disk (75) through a bearing; the bottom of the fixed shaft (76) is fixed to the lower clamping plate (2); and the fixed disk (73) is fixed to the fixed shaft (76); The cross section of the chute (731) is T-shaped, the cross section of the chute (731) is such that the bottom width is greater than the opening width, the slide rod (74) is provided at the bottom of the chute (731), and the guide column (741) is provided at the opening of the chute (731); A hollow rotating shaft (77) is provided in the middle of the upper surface of the rotating disk (75), and a knob (78) is fixed on the top of the rotating shaft (77); The upper surface of the fixed disk (73) is provided with a plurality of positioning holes (730) along the circumferential direction, the top of the knob (78) is provided with an extension rod (781), the bottom of the extension rod (781) is provided with a positioning bead (782) that cooperates with the positioning hole (730), a limiting groove (783) is provided in the extension rod (781), a tightening spring (784) is provided in the limiting groove (783), one end of the tightening spring (784) is fixedly connected to the inner top of the limiting groove (783), and the other end is fixedly connected to the positioning bead (782).

2. A superimposed magnetic clamp according to claim 1, characterized in that: A compression spring (6) is provided between the pressure plate (4) and the upper clamping plate (1).

3. The superimposed magnetic clamp according to claim 1, characterized in that: The splint lock (5) includes a fixed seat (51), an operating rod (52), a transition plate (53), and a connecting rod (54). The fixed seat (51) is fixed on the lower splint (2). The two operating rods (52) are arranged on both sides of the fixed seat (51). The ends of the operating rods (52) are hinged to the fixed seat (51). A groove (511) is provided on the top of the fixed seat (51). The end of the connecting rod (54) is arranged in the groove (511) and is hinged to the fixed seat (51). The top end of the connecting rod (54) is fixedly connected to the upper splint (1). One end of the transition plate (53) is hinged to the middle of the operating rod (52), and the other end is hinged to the middle of the connecting rod (54).

4. The superimposed magnetic clamp according to claim 2, characterized in that: Each pressure plate (4) is provided with four compression springs (6) in an array.

5. The superimposed magnetic clamp according to claim 3, characterized in that: A silicone handle (520) is provided at the end of the operating rod (52).

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