CN217427960U - Inner rotor of torque-limiting permanent magnet coupler - Google Patents

Abstract

The utility model discloses an inner rotor with limit square permanent magnetism coupling of square shaft surface formation point contact, it is including cup jointing at the epaxial solid magnetic disc that can be at the square shaft axial slip of square shaft, be provided with the attaching plate on the solid magnetic disc, the square hole that runs through the square shaft is seted up on the surface of attaching plate, the cambered surface hole has all been seted up all around of solid magnetic disc and attaching plate, the grafting strip has been run through to the inside in cambered surface hole, the gyro wheel mounting groove has been seted up on the characterized by solid magnetic disc, the gyro wheel spacing groove that all corresponds with the gyro wheel mounting groove has been seted up to each cambered surface hole adjacent both sides on the attaching plate, the gyro wheel mounting groove is inlayed with the gyro wheel spacing inslot and is had the gyro wheel mechanism that forms the point contact with the square shaft surface, the utility model discloses make gyro wheel form the point contact with the square shaft surface, reduce frictional force, and the gyro wheel can follow the square shaft surface roll, improve the flexibility that the solid magnetic disc removed. The hidden trouble that the semi-circular round pin on the solid magnetic disc can not move in a flexible way is solved.

Description

Inner rotor of torque-limiting permanent magnet coupler

Technical Field

The utility model relates to a mechanical transmission part, specifically speaking are inner rotor of limit square type magnetic coupling.

Background

The magnetic coupler is also called as a magnetic coupler and a permanent magnetic transmission device, and mainly comprises an induction disc and a fixed magnetic disc, wherein the fixed magnetic disc is connected with a motor shaft, the induction disc is connected with a shaft of a working machine, an air gap (called as an air gap) is arranged between the induction disc and the fixed magnetic disc, and the induction disc and the fixed magnetic disc are not in mechanical connection for transmitting torque. Therefore, a soft (magnetic) connection is formed between the motor and the working machine, and the torque and the rotating speed of the working machine shaft are changed by adjusting the air gap. The air gap adjusting mode is different, and the air gap adjusting mode is divided into different types such as a standard type, a delay type, a moment limiting type, a speed adjusting type and the like.

In the existing torque-limiting magnetic coupler structure, when there is relative slip between the inner and outer rotors, i.e. a rotational speed difference, the induction disc will generate an induced eddy current inside the induction disc due to cutting magnetic lines (or the density and polarity of the magnetic lines passing through the induction disc are changed), the eddy current induces an induced magnetic field with the same polarity as the original magnetic field, the two magnetic fields interact to form a magnetic induction force, and the larger the rotational speed difference is, the larger the magnetic induction force is. Under the action of magnetic induction force generated by the induction disc, the solid magnetic disc is caused to axially displace towards the center along the square shaft. In the case of torque-limiting magnetic couplings, axial displacement of the fixed disk is important. If the fixed magnetic disk cannot axially displace along the surface of the square shaft under the condition of overload operation, the induced eddy current of the induction disk heats the induction disk, and under the condition of insufficient heat exchange, a heat source radiates to the surface of the magnetic block of the fixed magnetic disk, so that the magnetic block reaches the demagnetization temperature in a short time to be demagnetized. After the magnetic blocks are demagnetized, the moment-limiting magnetic coupler cannot be coupled to work normally again, so that the moment-limiting magnetic coupler can only be scrapped or returned to a factory for magnetizing and maintaining again. As shown in FIG. 1, the fixed disk and the square shaft are installed by sliding fit of a semicircular pin embedded on the fixed disk, when the fit is too tight or too loose and no lubricating grease exists, the fixed disk cannot move flexibly, and dust adheres to the surface of the square shaft to influence the flexible movement of the fixed disk in the long-term operation process. The square shaft is made of alloy aluminum, the outer surface of the square shaft is not specially processed, and the square shaft and a contact surface of a semicircular pin embedded on the fixed magnetic disc form large friction force, so that the flexible movement of the fixed magnetic disc is influenced.

Disclosure of Invention

The utility model aims at providing an inner rotor of limit square permanent magnet coupler who forms the point contact with square shaft surface.

The utility model discloses an adopt following technical scheme to realize its invention purpose, an inner rotor of limit square permanent magnet coupler, it is including cup jointing the solid magnetic disc that can axial slip on the square shaft, be provided with the attaching plate on the solid magnetic disc, the square hole that runs through the square shaft is seted up on the surface of attaching plate, the cambered surface hole has all been seted up all around of solid magnetic disc and attaching plate, the grafting strip has been run through to the inside in cambered surface hole, the gyro wheel mounting groove has been seted up on the solid magnetic disc, the gyro wheel spacing groove that all corresponds with the gyro wheel mounting groove is seted up to each cambered surface hole adjacent both sides on the attaching plate, the gyro wheel mounting groove is inlayed with the gyro wheel spacing inslot and is had the gyro wheel mechanism that forms the point contact with the square shaft surface.

The gyro wheel mounting groove distributes the adjacent both sides in each cambered surface hole on solid magnetic disk, the gyro wheel spacing groove distributes the adjacent both sides in each cambered surface hole on the attaching plate.

Gyro wheel mechanism include the gyro wheel axle, be equipped with the gyro wheel on the gyro wheel axle, the gyro wheel mounting groove including the gyro wheel groove of placing the gyro wheel, gyro wheel groove both sides are equipped with the gyro wheel axial groove of inlaying the gyro wheel axle, the gyro wheel spacing groove corresponds the setting with the gyro wheel groove.

Due to the adoption of the technical scheme, the utility model discloses better realization invention purpose, its simple structure makes gyro wheel and square shaft surface form the point contact, reduces frictional force, and the gyro wheel can roll along square shaft surface moreover, improves the flexibility that the solid magnetic disc removed. The hidden trouble that the semi-circular round pin on the solid magnetic disc can not move in a flexible way is solved.

Drawings

FIG. 1 is an exploded view of the prior art;

FIG. 2 is a schematic diagram of a torque-limiting permanent magnet coupler;

fig. 3 is an exploded view of the present invention.

The magnetic coupling comprises a first coupling 1, a magnetic conductive lining plate 2, an induction disc 3, an I-shaped support 4, a permanent magnet 5, a magnetic disc 6, a square shaft 7, a second coupling 8, a first screw 9, a second screw 10, a magnetic disc stopper 11, a third screw 12, a gap adjusting pad 13, a shaft shoulder 14, a roller 15, a roller shaft 16, a binding plate 17, a roller limiting groove 18, a roller groove 19, a roller shaft groove 20, an arc surface hole 21 and a semicircular pin 22.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

As can be seen from fig. 1, the fixed disk 6 and the square shaft 7 are mounted by sliding fit through the semicircular pin 22 embedded in the fixed disk 6, and when the fit is too tight or too loose and no grease is present, the fixed disk cannot move flexibly, and during long-term operation, dust adheres to the surface of the square shaft 7, which also affects the flexible movement of the fixed disk 6. The square shaft 7 is made of alloy aluminum, the outer surface of the square shaft is not specially processed, and a large friction force is formed on the contact surface of the square shaft and the semicircular pin 22 embedded on the fixed magnetic disc 6, so that the flexible movement of the fixed magnetic disc 6 is influenced.

As can be seen from fig. 2, the torque-limiting permanent magnet coupler mainly comprises an outer rotor and an inner rotor, wherein the inner rotor and the outer rotor are not rigidly connected, axial gaps delta 1 and delta 2 are reserved between the inner rotor and the outer rotor, and the outer rotor comprises a first shaft coupling 1, a magnetic conductive lining plate 2, an induction disc 3 and an i-shaped bracket 4; the induction disc 3 is fixed on the inner side of the magnetic conduction lining plate 2 and corresponds to the permanent magnet 5 of the inner rotor; the inner rotor is composed of a permanent magnet 5, a fixed magnetic disk 6, a square shaft 7 and a second coupling joint 8, the permanent magnet 5 is positioned on the outer side of the fixed magnetic disk 6 and corresponds to the induction disk 3 of the outer rotor, and the fixed magnetic disk 6 can axially slide on the square shaft 7, so that the sizes of gaps delta 1 and delta 2 are changed. In general, the outer rotor is connected as a driving rotor to the motor via the first coupling 1, and the inner rotor is connected as a driven rotor to the reduction gear via the second coupling 8. The first screw 9 for adjusting the clearance, the disk fixing stopper 11 and the second screw 10 thereof, the clearance adjusting pad 13 and the third screw 12 thereof are provided for clearance adjustment at the time of shipment and must be removed before the start-up operation.

As shown in FIG. 3, the inner rotor of the torque-limiting permanent magnet coupler comprises fixed magnetic disks 6 sleeved at two ends of a shaft sleeve, wherein the shaft sleeve comprises a square shaft 7 and a shaft shoulder 14, the fixed magnetic disks 6 are sleeved on the square shaft 7 through square holes formed in the middle part, a magnetic rotor at one end of the square shaft 7 is clamped on the shaft shoulder 14, a magnetic rotor at the other end of the square shaft 7 is clamped on a baffle plate, the baffle plate is fixed with the end surface of the square shaft 7, the fixed magnetic disks 6 are sleeved on the square shaft 7 and can axially slide on the square shaft 7, an attaching plate 17 is arranged on the fixed magnetic disks 6, square holes penetrating through the square shaft 7 are formed in the surface of the attaching plate 17, arc surface holes 21 are formed around the fixed magnetic disks 6 and the attaching plate 17, inserting strips penetrate through the inner parts of the arc surface holes 21, and are characterized in that roller mounting grooves are formed in the fixed magnetic disks 6, roller limiting grooves 18 corresponding to the roller mounting grooves are formed in two adjacent sides of the arc surface holes 21 on the attaching plate 17, a roller mechanism which forms point contact with the surface of the square shaft 7 is embedded in the roller mounting groove and the roller limiting groove 18.

The gyro wheel mounting groove distributes the adjacent both sides in each cambered surface hole 21 on solid magnetic disk 6, gyro wheel spacing groove 18 distributes the adjacent both sides in each cambered surface hole 21 on attaching plate 17.

Roller mechanism include gyro wheel axle 16, be equipped with gyro wheel 15 on the gyro wheel axle 16, the gyro wheel mounting groove including the gyro wheel groove 19 of placing gyro wheel 15, gyro wheel groove 19 both sides are equipped with the gyro wheel axial groove 20 of inlaying gyro wheel axle 16, gyro wheel spacing groove 18 corresponds the setting with gyro wheel groove 19.

The utility model discloses the during operation, gyro wheel 15 and 7 surface formation point contacts of square shaft reduce frictional force, and 7 surface rollings of square shaft can be followed to gyro wheel 15 moreover, improve the flexibility that solid magnetic disc 6 removed. The hidden trouble that the semicircular pin 22 on the fixed disk 6 cannot move flexibly is solved.

Claims (3)

1. The utility model provides an inner rotor of limit for moment type permanent magnet coupler, it is including cup jointing can be at the solid magnetic disc of axial slip on the square shaft, be provided with the attaching plate on the solid magnetic disc, the square hole that runs through the square shaft is seted up on the surface of attaching plate, cambered surface hole has all been seted up around solid magnetic disc and attaching plate, the inside of cambered surface hole is run through there is the grafting strip, the gyro wheel mounting groove has been seted up on the characterized by solid magnetic disc, the gyro wheel spacing groove that all corresponds with the gyro wheel mounting groove is seted up to each cambered surface hole adjacent both sides on the attaching plate, the gyro wheel mounting groove is inlayed with the gyro wheel spacing inslot and is had the gyro wheel mechanism that forms the point contact with the square shaft surface.

2. The inner rotor of a torque-limiting permanent magnet coupler of claim 1, wherein the roller mounting slots are disposed on adjacent sides of the arc holes of the fixed magnetic disk, and the roller limiting slots are disposed on adjacent sides of the arc holes of the attachment plate.

3. An inner rotor of a torque-limiting permanent magnet coupler according to claim 1 or 2, wherein the roller mechanism includes a roller shaft, the roller shaft is provided with a roller, the roller mounting groove includes a roller groove for receiving the roller, roller grooves are provided on both sides of the roller groove, the roller shaft is embedded with the roller shaft, and a roller limiting groove is provided corresponding to the roller groove.

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