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CN-122001154-A - Magnetic buffer piece and pressure maintaining machine with same

CN122001154ACN 122001154 ACN122001154 ACN 122001154ACN-122001154-A

Abstract

The application relates to the technical field of pressure maintenance machines, and provides a magnetic buffer piece and a pressure maintenance machine with the same, wherein the magnetic buffer piece comprises a stator, a rotor and a permanent magnet group, the stator is provided with a through guide groove along the length direction of the stator, and the rotor is slidably embedded in the guide groove; the permanent magnet groups comprise a first permanent magnet group and a second permanent magnet group, the first permanent magnet group is fixedly arranged on the inner side wall of the stator, which is positioned in the guide groove, the second permanent magnet group is fixedly arranged on the outer side wall of the rotor and corresponds to the first permanent magnet group in position, and magnetic poles of the first permanent magnet group and the second permanent magnet group are arranged in an asymmetric coupling mode. The spring return mechanism reduces the problem of return force attenuation caused by elastic fatigue and plastic deformation of the traditional spring return mechanism, does not need to replace an elastic element periodically, prolongs the service life of the return mechanism, and can reduce the possibility of free falling of a pressing block by means of magnetic force between permanent magnets under the condition of power failure.

Inventors

  • Luo Zhaoguan
  • CHENG LONG

Assignees

  • 宁波市罗氏磁业有限公司

Dates

Publication Date
20260508
Application Date
20260209

Claims (10)

  1. 1. A magnetic buffer piece is characterized by comprising a stator (1), a rotor (2) and a permanent magnet group (3), wherein a penetrating guide groove (11) is formed in the stator (1) along the length direction of the stator, the rotor (2) is slidably embedded in the guide groove (11), the permanent magnet group (3) comprises a first permanent magnet group (31) and a second permanent magnet group (32), the first permanent magnet group (31) is fixedly arranged on the inner side wall of the guide groove (11) of the stator (1), the second permanent magnet group (32) is fixedly arranged on the outer side wall of the rotor (2) and corresponds to the position of the first permanent magnet group (31), the permanent magnets corresponding to one side of the guide groove (11) are arranged in the same polarity, an air gap (4) is reserved between the stator (1) and the rotor (2), the corresponding permanent magnets corresponding to the other side of the guide groove (11) are oppositely arranged, one side of the stator (1) away from the rotor (2) is provided with a first pressing block (52) which is connected with the first connecting part (12) of the stator (2), and the connecting part (52) of the first pressing block (2) is arranged.
  2. 2. A magnetic buffer according to claim 1, characterized in that the air gap (4) spacing is 5-8mm.
  3. 3. A magnetic buffer according to claim 1 wherein the first permanent magnet group (31) and the second permanent magnet group (32) each comprise a plurality of permanent magnet pieces arranged at intervals in the axial direction, and the permanent magnet pieces are NdFeB permanent magnets.
  4. 4. The pressure maintaining machine with the buffer piece is characterized by comprising a machine body (5), an air cylinder (51), a pressing block (52) and a magnetic buffer piece, wherein the magnetic buffer piece is provided with a mounting plate (53) for mounting the air cylinder (51) on the machine body (5), a stator (1) of the magnetic buffer piece is mounted on the mounting plate (53) through a first connecting part (12), a rotor (2) is mounted through a second connecting part (21) and the pressing block (52), a piston (62) rod of the air cylinder (51) is vertically arranged, and the piston (62) rod of the air cylinder (51) is abutted to the upper surface of the pressing block (52).
  5. 5. The pressure maintaining machine with the buffering piece according to claim 4, wherein the mounting plate (53) is provided with a self-driven cooling mechanism (6) for cooling the magnetic buffering piece which moves reciprocally.
  6. 6. The pressure maintaining machine with the buffer member as set forth in claim 5, wherein the self-driven cooling mechanism (6) comprises a gas collecting tank (61) mounted on the mounting plate (53), a piston (62) sliding in the gas collecting tank (61), a movable piston rod (63) fixedly connected with the piston (62) and a gas outlet pipe (64) fixedly penetrating through the gas collecting tank (61), the gas collecting tank (61) is provided with a gas inlet (611) and a gas outlet (612) connected with the gas outlet pipe (64), the gas collecting tank (61) is provided with one-way valves (613) at the gas inlet (611) and the gas outlet (612), external gas enters the gas collecting tank (61) through the gas inlet (611) and flows out of the gas outlet (612), the gas outlet direction of the gas outlet pipe (64) faces the magnetic buffer member, and the movable piston rod (63) is connected with the pressing block (52) or the rotor (2).
  7. 7. The pressure maintaining machine with the buffering piece according to claim 6, wherein the self-driven cooling mechanism (6) further comprises a swinging assembly (65) for driving the air outlet pipe (64) to swing.
  8. 8. The pressure maintaining machine with the buffer according to claim 7, wherein the air outlet pipe (64) comprises a fixing part (642) fixed with the air collecting box (61) and a swinging part (643) rotatably connected with the fixing part (642), the swinging assembly (65) comprises a control rope (651) connected with the swinging part (643) and a first resetting piece (652) for driving the swinging part (643) to reset, and the control rope (651) is connected with the rotor (2) or the pressing block (52).
  9. 9. The pressure maintaining machine with the buffering piece according to claim 6, wherein the self-driven cooling mechanism (6) further comprises a water storage box (66) arranged on the mounting plate (53), a water guide pipe (67) communicated with the water storage box (66), a regulating valve (68) arranged on the water guide pipe (67) and a spray head (69) arranged at the water outlet end of the water guide pipe (67), the spray head (69) is a pressing type spray head (69), a pressing block (631) is arranged on the movable piston rod (63), and the pressing block (631) is used for pressing the spray head (69).
  10. 10. The pressure maintaining machine with the buffering piece according to claim 9, wherein the self-driven cooling mechanism (6) further comprises a control assembly (7), and the control assembly (7) is used for controlling the spray head (69) to spray water intermittently.

Description

Magnetic buffer piece and pressure maintaining machine with same Technical Field The application relates to the technical field of pressure maintaining machines, in particular to a magnetic buffer piece and a pressure maintaining machine with the same. Background The pressure retention machine is widely applied to the processes of composite material molding, circuit board lamination, precision part assembly and the like, and has the core function of exerting and maintaining stable pressure on a workpiece through a pressing block. After the pressure maintaining process is completed, the pressing block needs to be quickly and reliably reset to the initial position for the next working cycle. At present, a pressure maintaining machine generally adopts a spring or an air cylinder as a reset mechanism of a pressing block. Spring reset (such as coil spring) simple structure, with low costs, but under long-term reciprocal cyclic load, metal material inevitably can take place elastic fatigue and plastic deformation, leads to reset force attenuation, usually just need shut down to change after tens of thousands to hundred thousand times of work, seriously influences equipment continuous operation efficiency and maintenance cost. The other scheme is to adopt a nitrogen spring, the service life of the nitrogen spring is prolonged, the nitrogen spring needs to be regularly maintained for inflation, the performance of the nitrogen spring is obviously affected by the ambient temperature, and the restoring force is insufficient due to the reduction of the air pressure at low temperature. The cylinder reset (especially the double-acting cylinder) can provide stable and controllable thrust, and the positioning accuracy is higher. However, this solution relies on a continuous supply of compressed air and electrical control, with high energy consumption (typically hundreds of watts per hour), and the pneumatic elements present a risk of wear and air leakage. More serious, when the power is suddenly cut off or the air source fails, the air cylinder loses power, and the pressing block can fall freely under the action of gravity, so that a great potential safety hazard exists, and further improvement is needed. Disclosure of Invention In order to solve the problems, the application provides a magnetic buffer piece and a pressure maintaining machine with the same. The application provides a magnetic buffer piece and a pressure maintaining machine with the same, which adopts the following technical scheme: The magnetic buffer piece comprises a stator, a rotor and a permanent magnet group, wherein the stator is provided with a penetrating guide groove along the length direction of the stator, the rotor is slidably embedded in the guide groove, the permanent magnet group comprises a first permanent magnet group and a second permanent magnet group, the first permanent magnet group is fixedly arranged on the inner side wall of the guide groove of the stator, the second permanent magnet group is fixedly arranged on the outer side wall of the rotor and corresponds to the position of the first permanent magnet group, magnetic poles of the first permanent magnet group and the second permanent magnet group are arranged in an asymmetric coupling mode, the polarities of permanent magnets corresponding to one side of the guide groove are the same, an air gap is reserved between the stator and the rotor, the polarities of permanent magnets corresponding to the other side of the guide groove are opposite, a first connecting part connected with a pressure maintaining machine is arranged on one side of the stator, which is far away from the stator, and a second connecting part connected with a pressing block is arranged on one side of the rotor, which is far away from the stator. Through adopting above-mentioned technical scheme, run-through guide groove that the stator offered provides stable slip path for the active cell, guarantees that the active cell slides smoothly. The first permanent magnet group is fixed on the inner side wall of the stator guiding groove, the second permanent magnet group is fixed on the outer side wall of the rotor, and the magnetic poles of the first permanent magnet group and the second permanent magnet group are arranged in an asymmetric coupling mode, specifically, on one side of the guiding groove, the polarities of the opposite permanent magnets are the same, axial repulsive force is generated to provide main buffering and resetting functions, on the other side of the guiding groove, the polarities of the opposite permanent magnets are different, radial attractive force is generated to firmly pre-cling the rotor to the inner wall of one side of the stator groove, so that a radial movement gap is actively eliminated, radial shaking or vibration cannot occur when the rotor moves, the movement track is extremely accurate and straight, and nearly ideal zero friction (practically planar sliding friction but no impact)