A multi-group composite permanent magnet eddy current coupler

Abstract

The present invention provides a multi-group composite permanent magnet eddy current coupler, which relates to the technical field of magnetic couplers and includes: an inner magnetic steel sleeve, which is composed of outer shells symmetrically arranged on the left and right sides, and a plurality of matching chambers are formed inside the inner magnetic steel sleeve; an outer magnetic steel disc, the number of the outer magnetic steel discs is the same as and corresponds to the number of the matching chambers one by one, the outer magnetic steel discs are all connected to the same power input shaft, a fixed outer magnetic steel disc is arranged in the sandwich chamber, and movable outer magnetic steel discs are arranged in the upper and lower telescopic chambers. The present invention has two working modes, and the two modes can be switched during the working process, so that the coupler can combine the advantages of direct shaft drive and magnetic coupling drive. This kind of drive mode can input a larger torque during the starting process and be converted into a non-contact coupling state during the rotation process, thereby reducing the damage to the input shaft during the accidental braking process.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic couplers, and particularly to a multi-group composite permanent magnet eddy current coupler. Background Art

[0002] In the prior art, there is a disc-type magnetic motor with the publication number of "CN104753396A". On the stator, there are arranged a stator yoke / stator body, a permanent magnet assembly with adjustable magnetic pole polarity and its adapted magnetic shoe, a permanent magnet rotation driving assembly and its driving controller. The driving controller controls the permanent magnet rotation driving assembly to make the N-S poles of each group of permanent magnets rotate orderly or according to a set rule or change the magnetic pole direction, and is assembled to form at least one group of permanent magnet dipole pairs, so as to form a counterclockwise / clockwise rotating permanent magnet rotating magnetic field or an alternating permanent magnet rotating magnetic field in the coupling air gap between the stator and the rotor, and drive the rotor to output torque. This device can overcome the disadvantages of large energy consumption of various existing motors or internal combustion engines and difficulty in speed regulation of high-voltage high-power motors, and provide power for various load devices.

[0003] However, there are still obvious defects in the above device during use: Although the above device can achieve high load and large torque, the above device cannot adjust the torque, and its working mode has only one torque transmission method of magnetic coupling. For large-torque motors or internal combustion engines, a large torque is required during startup, otherwise the problem of magnetic coupler slip may occur, which will affect the effective output of power. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-group composite permanent magnet eddy current coupler to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A multi-group composite permanent magnet eddy current coupler, comprising:

[0007] An inner magnetic steel sleeve, which is composed of outer shells symmetrically arranged on the left and right sides. One end of the inner magnetic steel sleeve is also integrally formed with a power output shaft, and a plurality of matching chambers are formed inside the inner magnetic steel sleeve;

[0008] Outer magnetic steel discs, the number of which is the same as and corresponds to the number of the matching chambers one by one. The outer magnetic steel discs are all connected to the same power input shaft. The power input shaft extends outward through a shaft hole opened at one end of the inner magnetic steel sleeve away from the power output shaft and is connected to a driving mechanism through a coupling; wherein,

[0009] The mating chamber is composed of telescopic chambers at the upper and lower ends and at least one interlayer chamber provided therebetween. A fixed external magnetic steel disc is provided in the interlayer chamber, and movable external magnetic steel discs are provided in the upper and lower telescopic chambers. The movable external magnetic steel discs on the upper and lower sides move synchronously towards or away from each other. By moving towards or away from each other, the coupling magnetic force intensity between the movable external magnetic steel disc and the internal magnetic steel sleeve is adjusted. The mechanism for driving the movable external magnetic steel discs on the upper and lower sides to move towards or away from each other synchronously is the coupling intensity adjustment mechanism;

[0010] A mating block is also telescopically provided at the bottom of the movable external magnetic steel disc on the side away from the power input shaft. The mating block is movably matched with the embedding groove opened on the internal magnetic steel sleeve. When the mating block is matched with the embedding groove of the internal magnetic steel sleeve, the internal magnetic steel sleeve is in contact fit with the movable external magnetic steel disc. When the mating block is disengaged from the embedding groove of the internal magnetic steel sleeve, the internal magnetic steel sleeve is magnetically coupled to the movable external magnetic steel disc. A telescopic mechanism for controlling the telescopic movement of the mating block is provided in the movable external magnetic steel disc.

[0011] Preferably, the power input shaft includes a shaft rod section and a magnetic steel disc connection section fixedly connected coaxially therewith. The diameter of the magnetic steel disc connection section is larger than that of the shaft rod section. Telescopic rod bodies are telescopically provided at both ends of the magnetic steel disc connection section. The two telescopic rod bodies are respectively fixedly connected to the movable external magnetic steel discs on the upper and lower sides. The closer sides of the two telescopic rod bodies on the upper and lower sides are respectively connected to the corresponding lifting pistons. The lifting pistons are slidably provided in the hollow chute opened on the magnetic steel disc connection section. An oil pumping ring is fixedly installed on the hollow chute between the two lifting pistons on both sides. The oil pumping ring is fixedly connected to the shaft rod section and communicated with the oil pumping channel opened in the shaft rod section. The oil pumping channel is communicated with an external oil pumping collar. By pumping hydraulic oil into the oil pumping collar through an oil pump, the positions of the two lifting pistons on both sides are adjusted, and further the separation distance between the movable external magnetic steel discs on the upper and lower sides is adjusted.

[0012] Preferably, spring grooves are further opened on both sides of the hollow chute. Compression springs are installed in the spring grooves. One end of each compression spring abuts against the spring groove and the other end abuts against the lifting piston. The compression springs are used to push the two lifting pistons towards the oil pumping ring side under the condition of no external force.

[0013] Preferably, there is one interlayer chamber, and the fixed external magnetic steel disc is fixedly sleeved outside the magnetic steel disc connection section.

[0014] Preferably, there are a pair of the matching blocks, and the pair of the matching blocks are respectively fixedly connected to the helical gear eccentric rods. The helical gear eccentric rods on both sides are meshed with the driving helical gear. The driving helical gear is also coaxially and fixedly arranged with the worm gear. The worm gear is matched with the worm gears arranged on both sides. A driving gear is also fixedly installed on the worm gear. The driving gear is meshed with the adjusting gear arranged on the inner magnetic steel sleeve. The adjusting gear is fixedly connected to the driving shaft of the adjusting motor. The matching block is arranged in the receiving groove. The matching block retracts or protrudes from the receiving groove during the rotation of the helical gear eccentric rod. When the matching block protrudes from the receiving groove, it is matched with the embedding groove when the movable outer magnetic steel disc approaches the magnetic steel disc connecting section.

[0015] Preferably, magnetic blocks are arranged in a circular arrangement on both the inner magnetic steel sleeve and the outer magnetic steel disc, and the N poles and S poles of the magnetic blocks are arranged alternately.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The present invention has two working modes, namely a contact transmission mode and a non-contact magnetic coupling mode. The two modes can be switched during the working process, so that the coupler can combine the advantages of direct shaft transmission and magnetic coupling transmission. For mechanisms that require large torque output, this transmission method can input a larger torque during the starting process and convert it into a non-contact coupling state during the rotation process, thereby reducing the damage to the input shaft during the accidental braking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional view of the magnetic block distribution structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the non-contact magnetic coupling mode of the present invention;

[0020] Figure 3 It is a schematic diagram of the state where the movable outer magnetic steel disc extends outwards in the non-contact magnetic coupling mode of the present invention;

[0021] Figure 4 It is a schematic diagram of the contact transmission mode of the present invention;

[0022] Figure 5 It is a schematic diagram of the matching state of the adjusting gear and the driving gear of the present invention;

[0023] Figure 6 It is a schematic diagram of the receiving and protruding states of the matching block of the present invention.

[0024] In the figure: 1 inner magnetic steel sleeve, 2 outer shell, 3 power output shaft, 4 fixed outer magnetic steel disc, 5 power input shaft, 6 rotating shaft hole, 7 telescopic chamber, 8 sandwich chamber, 9 fitting block, 10 embedding groove, 11 shaft rod section, 12 magnetic steel disc connection section, 13 telescopic rod body, 14 lifting piston, 15 hollow sliding groove, 16 oil pumping ring, 17 oil pumping sleeve ring, 18 spring groove, 19 extrusion spring, 20 helical gear eccentric rod, 21 driving helical gear, 22 worm gear, 23 worm, 24 driving gear, 25 adjusting gear, 26 storage groove, 27 magnetic block, 28 movable outer magnetic steel disc. Specific implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figure 1-6 , the present invention provides a technical solution:

[0027] Embodiment 1:

[0028] A multi-group composite permanent magnet eddy current coupler, comprising:

[0029] Inner magnetic steel sleeve 1, the inner magnetic steel sleeve 1 is composed of outer shells 2 symmetrically arranged on the left and right sides. One end of the inner magnetic steel sleeve 1 is also integrally formed with a power output shaft 3, and a plurality of fitting chambers are formed inside the inner magnetic steel sleeve 1;

[0030] Outer magnetic steel discs, the number of outer magnetic steel discs is the same as and corresponds one by one to the number of fitting chambers. The outer magnetic steel discs include a fixed outer magnetic steel disc and a movable outer magnetic steel disc. The outer magnetic steel discs are all connected to the same power input shaft 5. The power input shaft 5 extends outward through a rotating shaft hole 6 opened at one end of the inner magnetic steel sleeve 1 away from the power output shaft 3 and is connected to a driving mechanism through a coupling; wherein,

[0031] The fitting chamber is composed of telescopic chambers 7 at the upper and lower ends and at least one sandwich chamber 8 arranged therebetween. A fixed outer magnetic steel disc 4 is arranged in the sandwich chamber 8, and movable outer magnetic steel discs 28 are arranged in the upper and lower telescopic chambers 7. The movable outer magnetic steel discs 28 on the upper and lower sides move synchronously in an approaching or separating manner. By the approaching or separating movement, the coupling magnetic force intensity between the movable outer magnetic steel disc 28 and the inner magnetic steel sleeve 1 is adjusted. The mechanism for driving the movable outer magnetic steel discs 28 on the upper and lower sides to move synchronously in an approaching or separating manner is a coupling strength adjusting mechanism;

[0032] On the bottom of the movable outer magnetic steel disc 28 on the side away from the power input shaft 5, a matching block 9 is also telescopically arranged. The matching block 9 is movably matched with the embedding groove 10 opened on the inner magnetic steel sleeve 1. When the matching block 9 is matched with the embedding groove 10 of the inner magnetic steel sleeve 1, the inner magnetic steel sleeve 1 is in contact fit with the movable outer magnetic steel disc 28. When the matching block 9 is disengaged from the embedding groove 10 of the inner magnetic steel sleeve 1, the inner magnetic steel sleeve 1 is magnetically coupled with the movable outer magnetic steel disc 28. An expansion and contraction mechanism for controlling the telescopic movement of the matching block 9 is arranged in the movable outer magnetic steel disc 28.

[0033] In this embodiment, a plurality of matching chambers are formed in the inner magnetic steel sleeve 1. The number of outer magnetic steel discs is the same as and corresponds one by one to the number of matching chambers. Referring to the accompanying drawings of the specification, the structure with three matching chambers is selected in this embodiment. The two outermost matching chambers are telescopic chambers 7, and the middle one is an interlayer chamber 8. Movable outer magnetic steel discs 28 are arranged in the upper and lower telescopic chambers 7, and a fixed outer magnetic steel disc 4 is arranged in the interlayer chamber 8. Since the fixed outer magnetic steel disc 4 cannot move along the axial direction, a stable magnetic coupling strength can be formed between it and the inner magnetic steel sleeve 1. However, the movable outer magnetic steel discs 28 on the upper and lower sides can perform translational sliding in the opposite or separating directions along the axial direction. Therefore, during the translational sliding process of the movable outer magnetic steel disc 28, the magnetic coupling strength between the inner magnetic steel sleeve 1 and the outer magnetic steel disc can be adjusted. Such a setting is particularly suitable for mechanical structures that require large torque output. In addition, since the transmission mechanism needs to output a larger torque during the startup process, but due to the limitations of magnetic coupling, it is easy to cause slipping steps and result in transmission failure during the process of outputting large torque. Against this background, in this embodiment, a telescopic matching block 9 is further arranged on the upper movable outer magnetic steel disc 28, and an embedding groove 10 is correspondingly opened on the inner magnetic steel sleeve 1. When the matching block 9 is matched with the embedding groove 10 of the inner magnetic steel sleeve 1, the inner magnetic steel sleeve 1 is in contact fit with the movable outer magnetic steel disc 28. At this time, the movable outer magnetic steel disc 28 directly outputs power to the inner magnetic steel sleeve 1 in a contact manner. This transmission method can input a larger torque, thus effectively solving the slipping step problem caused by the large torque output of the magnetic coupler. After the inner magnetic steel sleeve 1 rotates synchronously, the matching block 9 is contracted. At this time, the non-contact magnetic coupling state is restored between the inner magnetic steel sleeve 1 and the outer magnetic steel disc. This non-contact transmission method can prevent the output end from being accidentally braked and causing an impact on the input end, thereby minimizing the damage to the transmission mechanism.

[0034] Embodiment 2:

[0035] The power input shaft 5 includes a shaft rod section 11 and a magnetic steel disk connection section 12 fixedly connected coaxially therewith. The diameter of the magnetic steel disk connection section 12 is greater than that of the shaft rod section 11. Telescopic rod bodies 13 are provided at both ends of the magnetic steel disk connection section 12 in a telescopic manner. The telescopic rod bodies 13 on both sides are fixedly connected to the movable outer magnetic steel disks 28 on the upper and lower sides respectively. The closer sides of the telescopic rod bodies 13 on the upper and lower sides are respectively connected to the corresponding lifting pistons 14. The lifting pistons 14 are slidably arranged in a hollow chute 15 opened in the magnetic steel disk connection section 12. An oil pumping ring 16 is fixedly installed on the hollow chute 15 between the two lifting pistons 14 on both sides. The oil pumping ring 16 is fixedly connected to the shaft rod section 11 and is communicated with an oil pumping channel opened in the shaft rod section 11. The oil pumping channel is communicated with an external oil pumping sleeve ring 17. The position of the two lifting pistons 14 on both sides is adjusted by pumping hydraulic oil into the oil pumping sleeve ring 17 through an oil pump, and further the separation distance between the movable outer magnetic steel disks 28 on the upper and lower sides is adjusted.

[0036] In this embodiment, a driving mechanism for driving the two movable outer magnetic steel disks 28 to move towards or away from each other synchronously is further disclosed. Hydraulic oil is pumped into and extracted from the hollow chute 15 through the oil pumping sleeve ring 17, so as to push the lifting pistons 14 in the hollow chute 15 to move towards or away from each other, and finally the purpose of driving the movable outer magnetic steel disks 28 to move is achieved. The oil pumping sleeve ring 17 is communicated with an external oil pump mechanism through a pipeline, and it can realize the driving during the rotation of the power input shaft 5, so as to realize torque adjustment.

[0037] Embodiment Three:

[0038] Spring grooves 18 are further opened on both sides of the hollow chute 15. Compression springs 19 are installed in the spring grooves 18. One end of each compression spring 19 abuts against the spring groove 18 and the other end abuts against the lifting piston 14. The compression springs 19 are used to push the two lifting pistons 14 towards the oil pumping ring 16 side without external force.

[0039] In this embodiment, the setting of the compression springs 19 can ensure that the pressures received by the two lifting pistons 14 are more stable, and further ensure the synchronization of the extension or contraction of the two lifting pistons 14.

[0040] Embodiment Four:

[0041] There are a pair of mating blocks 9, and the pair of mating blocks 9 are respectively fixedly connected to the helical gear eccentric rods 20. The helical gear eccentric rods 20 on both sides are meshed with the driving helical gear 21. The driving helical gear 21 is also coaxially and fixedly arranged with the worm gear 22. The worm gear 22 cooperates with the worm shafts 23 arranged on both sides. A driving gear 24 is also fixedly installed on the worm shaft 23. The driving gear 24 is meshed with the adjusting gear 25 arranged on the inner magnetic steel sleeve 1. The adjusting gear 25 is fixedly connected to the driving shaft of the adjusting motor. The mating block 9 is arranged in the receiving groove 26. The mating block 9 retracts or protrudes from the receiving groove during the rotation of the helical gear eccentric rod 20. When the mating block 9 protrudes from the receiving groove 26, it cooperates with the embedding groove 10 when the movable outer magnetic steel disk 28 approaches the magnetic steel disk connecting section 12.

[0042] In this embodiment, a driving mechanism for driving the mating block 9 to rotate is further disclosed. During the adjustment process, the telescopic movement of the movable outer magnetic steel disk 28 is required for cooperation. The telescopic mechanism of the movable outer magnetic steel disk 28 refers to the adjustment method in Embodiment 2. When the movable outer magnetic steel disk 28 moves away and the adjusting gear 25 cooperates with the driving gear 24, the rotation of the driving gear 24 drives the worm shaft 23 to rotate. The rotation of the worm shaft 23 drives the worm gear 22 to rotate and then drives the mating block 9 to flip. The purpose of adopting the worm and worm gear mechanism is to utilize its reverse self-locking principle, which can maintain the state of the mating block 9 after the adjustment of the adjusting gear 25, thus ensuring the torque transmission effect of the abutment. The adjusting gear 25 is driven and adjusted by an adjusting motor installed in the inner magnetic steel sleeve 1. Wires for supplying power to the adjusting motor are arranged in the inner magnetic steel sleeve 1.

[0043] Embodiment Five:

[0044] Magnetic blocks 27 are arranged in a circular pattern on both the inner magnetic steel sleeve 1 and the outer magnetic steel disk 4, and the N poles and S poles of the magnetic blocks 27 are arranged alternately.

[0045] In this embodiment, referring to the attached drawings of the specification Figure 1 , the layout structure and direction of the magnetic blocks 27 are further disclosed. By arranging the magnetic blocks 27 on the arc-shaped side wall and the two end faces of the outer magnetic steel disk, while ensuring the magnetic coupling strength, the coupling strength can also be adjusted.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-group composite permanent magnet eddy current coupler, characterized in that: include: An inner magnetic steel sleeve, wherein the inner magnetic steel sleeve is composed of outer shells symmetrically arranged on the left and right sides, and a power output shaft is integrally formed at one end of the inner magnetic steel sleeve, and a plurality of matching chambers are formed in the inner magnetic steel sleeve; The number of the outer magnetic steel disks is consistent with the number of the matching chambers and corresponds one to one. The outer magnetic steel disks are all connected to the same power input shaft. The power input shaft extends outward through the shaft hole opened at one end of the inner magnetic steel sleeve away from the power output shaft and is connected to the driving mechanism through a coupling; wherein, The matching chamber is composed of telescopic chambers at the upper and lower ends and at least one interlayer chamber arranged therebetween, a fixed external magnetic steel disk is arranged in the interlayer chamber, and movable external magnetic steel disks are arranged in the upper and lower telescopic chambers, and the movable external magnetic steel disks on the upper and lower sides synchronously move toward or away from each other, and the coupling magnetic strength between the movable external magnetic steel disk and the inner magnetic steel sleeve is adjusted by the movement toward or away from each other, and the mechanism that drives the upper and lower movable external magnetic steel disks to move toward or away from each other synchronously is a coupling strength adjustment mechanism; A mating block is also telescopically arranged at the bottom of the movable outer magnetic steel disk away from the side of the power input shaft, and the mating block is movably matched with the embedding groove provided on the inner magnetic steel sleeve. When the mating block is matched with the embedding groove of the inner magnetic steel sleeve, the inner magnetic steel sleeve and the movable outer magnetic steel disk are contact-matched. When the mating block is disengaged from the embedding groove of the inner magnetic steel sleeve, the inner magnetic steel sleeve and the movable outer magnetic steel disk are magnetically coupled and connected. A telescopic mechanism for controlling the telescopic movement of the mating block is arranged inside the movable outer magnetic steel disk.

2. A multi-group composite permanent magnet eddy current coupler according to claim 1, characterized in that: The power input shaft includes a shaft section and a magnetic steel disk connecting section coaxially fixed thereto, the diameter of the magnetic steel disk connecting section is larger than the diameter of the shaft section, telescopic rod bodies are telescopically arranged at both ends of the magnetic steel disk connecting section, the telescopic rod bodies on both sides are respectively fixedly connected to the movable external magnetic steel disks on the upper and lower sides, the close sides of the telescopic rod bodies on the upper and lower sides are respectively connected to the corresponding lifting pistons, the lifting pistons are slidingly arranged in the hollow slide groove opened in the magnetic steel disk connecting section, and an oil pumping ring is also fixedly installed on the hollow slide groove between the lifting pistons on both sides, the oil pumping ring is fixedly connected to the shaft section and communicated with the oil pumping channel opened in the shaft section, the oil pumping channel is communicated with the external oil pumping sleeve ring, and the hydraulic oil is pumped into the oil pumping sleeve ring by the oil pump to adjust the position of the lifting pistons on both sides, and then the spacing between the movable external magnetic steel disks on the upper and lower sides is adjusted.

3. A multi-group composite permanent magnet eddy current coupler according to claim 2, characterized in that: Spring grooves are also provided on both sides of the hollow slide groove, and extrusion springs are installed in the spring grooves. One end of the extrusion spring abuts against the spring groove and the other end abuts against the lifting piston. The extrusion spring is used to push the lifting pistons on both sides toward the pump oil ring without external force.

4. A multi-group composite permanent magnet eddy current coupler according to claim 3, characterized in that: The interlayer chamber is provided with one, and the fixed outer magnetic steel disk fixing sleeve is arranged outside the magnetic steel disk connecting section.

5. A multi-group composite permanent magnet eddy current coupler according to claim 4, characterized in that: The matching blocks are provided in a pair, and the matching blocks are respectively fixedly connected to the eccentric rod of the bevel gear, the eccentric rods of the bevel gear on both sides are meshed with the active bevel gear, and the active bevel gear is also coaxially fixed with the worm gear, the worm gear is matched with the worm gears provided on both sides, and a driving gear is also fixedly installed on the worm gear, the driving gear is meshed with the adjusting gear provided on the inner magnetic steel sleeve, and the adjusting gear is fixedly connected to the driving shaft of the adjusting motor, the matching blocks are provided in the receiving groove, and the matching blocks are retracted or protruded from the receiving groove during the rotation of the eccentric rod of the bevel gear, and when the matching blocks protrude from the receiving groove, they are matched with the embedded groove when the movable outer magnetic steel disk approaches the magnetic steel disk connecting section.

6. A multi-group composite permanent magnet eddy current coupler according to claim 5, characterized in that: The inner magnetic steel sleeve and the outer magnetic steel disk are both provided with magnetic blocks arranged in an annular manner, and the N poles and S poles of the magnetic blocks are arranged alternately.

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