Stacked magnetic clamp

Abstract

The invention discloses a stacked magnetic clamp which comprises an upper clamping plate, a lower clamping plate, limiting columns, a pressing plate and clamping plate lock catches, the multiple limiting columns are arranged on the upper surface of the lower clamping plate, the upper surface of the lower clamping plate is divided into four magnet containing areas through the limiting columns, the pressing plate is arranged at the bottom of the upper clamping plate, and the clamping plate lock catches are arranged on the pressing plate. The four pressing plates are matched with the magnet containing area, and the clamping plate lock catch is arranged between the upper clamping plate and the lower clamping plate and used for controlling closing of the upper clamping plate and the lower clamping plate. A plurality of pieces of magnetic steel coated with glue are placed in the four magnet placing areas, position positioning is carried out through the limiting columns to prevent movement, then the lower clamping plate is driven by the clamping plate lock catch to press downwards to apply pressure to the stacked magnets, it can be ensured that the magnetic steel is tightly attached to the glue layer, gaps and bubbles are eliminated, the bonding strength and heat conductivity are improved, meanwhile, displacement of the magnetic sheets is prevented, and the service life of the magnetic steel is prolonged. Curing deformation is reduced, magnetic circuit performance is optimized, and stability and reliability of the whole structure are enhanced.

Description

Technical Field

[0001] The present invention relates to a clamp device, in particular to a superimposed magnetic clamp. Background Art

[0002] Neodymium iron boron permanent magnets are widely used in industrial motors, automotive motors, wind power generation, generators and other fields. However, for high-speed permanent magnet motors, rotor magnet loss has become a key factor affecting their reliable operation. During high-speed rotation, the eddy current loss generated by the magnets causes the rotor temperature to rise, leading to demagnetization of the permanent magnets. In order to reduce the eddy current loss of the magnets, multiple pieces of permanent magnet neodymium iron boron magnets are bonded together to reduce the eddy current loss of the magnets. The traditional method is to apply glue between the magnets and then directly bake them. In this way, there may be gaps between the uncompacted magnets or uneven glue distribution. After curing, the bonding surfaces are not in sufficient contact, resulting in insufficient bonding strength and loss of magnetic properties. Therefore, it is necessary to propose a superimposed magnetic clamp. Summary of the Invention

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

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: A superimposed magnetic clamp includes an upper clamp, a lower clamp, a limiting column, a pressure plate, and a clamp lock. Several limiting columns are arranged on the upper surface of the lower clamp, and the upper surface of the lower clamp is divided into four magnet placement areas by the limiting columns. The pressure plate is arranged at the bottom of the upper clamp, and the four pressure plates cooperate with the magnet placement areas. The clamp lock is arranged between the upper clamp and the lower clamp to control the closing of the upper clamp and the lower clamp.

[0005] The present invention places multiple pieces of magnetic steel coated with glue in four magnet placement areas, and uses limit columns to locate their positions to prevent movement. Then, the clamping plate lock drives the lower clamping plate to press down to apply pressure to the superimposed magnets, which can ensure that the magnetic steel and the glue layer fit tightly, eliminate gaps and bubbles, improve bonding strength and thermal conductivity, and at the same time prevent displacement of the magnetic sheets, reduce curing deformation, optimize magnetic circuit performance, and enhance the stability and reliability of the overall structure.

[0006] Preferably, a compression spring is provided between the pressure plate and the upper clamping plate, and the local stress is balanced through the elastic deformation of the compression spring to ensure that the bonding surface is subjected to uniform force, reduce bubbles and gaps, and apply pressure evenly. The spring can automatically adjust the pressure to adapt to changes in the thickness of the adhesive layer or thermal expansion and contraction, avoid overpressure damage to the magnetic steel, and achieve the effect of dynamic pressure compensation.

[0007] Preferably, the splint lock includes a fixed seat, an operating rod, a transition plate, and a connecting rod. The fixed seat is fixed on the lower splint, and the two operating rods are arranged on both sides of the fixed seat. The end of the operating rod is hinged to the fixed seat, and a groove is provided on the top of the fixed seat. The end of the connecting rod is arranged in the groove and is hinged to the fixed seat. The top end of the connecting rod is fixedly connected to the upper splint, 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.

[0008] The present invention realizes the clamping function by lifting and returning the upper clamp plate upwards through the operation rod lifting and returning upwards, and the operation is convenient.

[0009] The adjusting screw threaded rod has an inner wall which is provided with an arc-shaped support plate, and the outer wall of the fixing plate has an inner wall which is provided with an arc-shaped support plate, and the fixing plate has an inner wall which is provided with an arc-shaped support plate.

[0010] The present invention drives the guide column to slide in the arc-shaped guide groove by the rotation of the rotating disk, thereby driving the slide rod to move in the direction close to or away from the center of the circle in the slide groove, thereby expanding or not expanding the elastic tube, thereby achieving the effect of adjusting the diameter of the elastic tube, so that when facing magnetic steels of different sizes, the elastic tube can always reach the limit position of the magnetic steel.

[0011] Preferably, the cross-section of the slide is T-shaped, the bottom width of the slide is greater than the opening width, the slide rod is arranged at the bottom of the slide, and the guide column is arranged at the opening of the slide, so that the T-shape prevents the slide rod from falling out of the slide.

[0012] Preferably, a hollow rotating shaft is provided in the middle of the upper surface of the rotating disk, a knob is fixed on the top of the rotating shaft, the diameter of the rotating shaft is larger than the diameter of the bearing, and the rotating disk can be manually rotated by the knob.

[0013] Preferably, the upper surface of the fixed plate is provided with several 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 that cooperates with the positioning hole, a limiting groove is provided in the extension rod, and a tightening spring is provided in the limiting groove, one end of the tightening spring is fixedly connected to the inner top of the limiting groove, and the other end is fixedly connected to the positioning bead.

[0014] The present invention cooperates with the positioning bead, the tightening spring and the positioning hole so that after the knob is rotated, the elastic force of the tightening spring can clamp the positioning bead into the positioning hole. At the same time, during the rotation process, the tightening spring can be compressed and the knob can be rotated, thereby ensuring that the knob can be rotated and fixed.

[0015] Preferably, each pressing plate is provided with four compression springs in an array so as to bear the force evenly.

[0016] Preferably, a silicone handle is provided at the end of the operating rod for easy operation.

[0017] In summary, the beneficial effects of the present invention are: 1. The present invention places multiple pieces of glue-coated magnets in four magnet placement areas, uses limit posts to position them to prevent movement, and then uses the clamping plate lock to drive the lower clamping plate to press down on the superimposed magnets. This ensures that the magnets fit tightly with the glue layer, eliminates gaps and bubbles, improves bonding strength and thermal conductivity, prevents displacement of the magnets, reduces curing deformation, optimizes magnetic circuit performance, and enhances the stability and reliability of the overall structure. 2. This invention balances local stress through the elastic deformation of the compression spring, ensuring uniform force on the bonding surface, reducing bubbles and gaps, and applying pressure evenly. The spring can automatically adjust the pressure to adapt to changes in adhesive layer thickness or thermal expansion and contraction, avoiding overpressure damage to the magnetic steel, thereby achieving the effect of dynamic pressure compensation. 3. The present invention drives the guide column to slide in the arc-shaped guide groove through the rotation of the rotating disk, thereby driving the slide rod to move along the direction close to or away from the center of the circle in the slide groove, thereby expanding or not expanding the elastic tube, thereby achieving the effect of adjusting the diameter of the elastic tube, so that when facing magnets of different sizes, the elastic tube can always reach the limit position of the magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the present invention as a whole; Figure 2 It is a side view schematic diagram of the splint lock buckle of the present invention; Figure 3 It is a schematic top view of the present invention as a whole; Figure 4 It is an overall schematic diagram of the diameter-adjustable column structure of the present invention; Figure 5This is an overall schematic diagram of the diameter-adjustable column structure of the present invention without the elastic cylinder; Figure 6 is a schematic diagram of a fixed disk of the present invention; Figure 7 is a schematic diagram of the slide bar and the arc-shaped support piece of the present invention; 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

[0019] 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.

[0020] The present invention will be described in detail below with reference to the accompanying drawings using embodiments.

[0021] Example

[0022] like Figure 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.

[0023] like Figure 4-7As shown, the limiting column 3 between two adjacent magnet placement areas 21 is a diameter-adjustable column structure 7, which includes an elastic cylinder 71 with a hollow interior, an arc-shaped support piece 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, and 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 piece 72 is fixed to the end of the slide rod 74. The elastic cylinder 71 is arranged on the outside of the arc-shaped support piece 72. The upper surface of the fixed disk 73 is also 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, and an arc-shaped limit groove 751 is opened at the position where the rotating disk 75 and the guide column 741 are opposite. The guide column 741 slides on the arc-shaped limit groove 751, and 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 on the lower splint 2, and the fixed disk 73 is fixed on the fixed shaft 76. The cross-section of the slide groove 731 is T-shaped, and the cross-section of the slide groove 731 is that the bottom width is greater than the opening width. The slide rod 74 is arranged at the bottom of the slide groove 731, and the guide column 741 is arranged at the opening of the slide groove 731.

[0024] like Figure 8 As shown, 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 diameter of the rotating shaft is larger than the diameter of the bearing. A plurality of positioning holes 730 are provided on the upper surface of the fixed disk 73 along the circumferential direction. An extension rod 781 is provided on the top of the knob 78, and a positioning bead 782 that cooperates with the positioning hole 730 is provided on the bottom of the extension rod 781. A limiting groove 783 is provided in the extension rod 781, and a tightening spring 782 is provided in the limiting groove 783. One end of the tightening spring 782 is fixedly connected to the inner top of the limiting groove 783, and the other end is fixedly connected to the positioning bead 782.

[0025] Working principle: Figure 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 clamping plate (1), a lower clamping plate (2), a limiting column (3), a pressure plate (4), and a clamping plate lock (5). A plurality of the limiting columns (3) are arranged on the upper surface of the lower clamping plate (2). 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) cooperate with the magnet placement areas. The clamping plate lock (5) is arranged between the upper clamping plate (1) and the lower clamping plate (2) and is used to control the closing of the upper clamping plate (1) and the lower clamping plate (2).

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 1, characterized in that: The limiting column (3) between two adjacent magnet placement areas (21) is a diameter-adjustable column structure (7), which includes an elastic tube (71) with a hollow interior, an arc-shaped support piece (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, and 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 piece (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 piece (72).

5. The superimposed magnetic clamp according to claim 4, characterized in that: 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 on the lower clamping plate (2); and the fixed disk (73) is fixed on the fixed shaft (76).

6. The superimposed magnetic clamp according to claim 5, characterized in that: The cross section of the chute (731) is T-shaped, and 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).

7. The superimposed magnetic clamp according to claim 6, characterized in that: 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 to the top of the rotating shaft (77).

8. The superimposed magnetic clamp according to claim 7, characterized in that: 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 (782) is provided in the limiting groove (783), one end of the tightening spring (782) is fixedly connected to the inner top of the limiting groove (783), and the other end is fixedly connected to the positioning bead (782).

9. 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.

10. 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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