JPH0255568A - Magnetic system connecting device - Google Patents

Abstract

PURPOSE:To transfer only forward torque slowly and surely by providing a power rectifier element transferring one way rotation only into a power transfer system. CONSTITUTION:A car air-conditioning freezing cycle is constituted of a capacitor 100 to liquefy and condense a high temperature and high pressure refrigerant discharged from a compressor 2, a liquid tank 110 containing a drying agent, an expansion valve 120 and an evaporator 130. A magnetic clutch 1 as a connecting device is provided to the end section of the compressor 2, and starting and operation stopping of the compressor 2 are conducted by discontinuous action thereof. A ball bearing 13 is provided to a cylindrical bearing section 12 integral to a partition member 9 of the compressor 2, and a pulley 10 is fitted and fixed thereto. In addition, an outer magnet 11 is fixed to the pulley 10, an inner magnet 8 is placed to the inside of the partition member 9 in accordance therewith, and a cylinder 4 of a magnetic force shielding element is provided. Accordingly, the outer magnet 11 and inner magnet 8 make the same rotation with the magnetic force by the rotation of the pulley 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a non-contact magnetic coupling device that can be used, for example, in a drive shaft of a refrigerant Y1 compressor for vehicle air conditioning.

[Conventional technology]

In order to transmit power non-contact using magnetic force, it includes a drive side part 10A and a driven side member A that are rotatably supported,
These members are provided with two magnets that can be interlocked by mutual magnetic coupling at positions facing the girder (one side plate). (2) Magnetic coupling devices are conventionally known. (Refer to Publication No. 61-69365) [Problems to be Solved by the Invention] In this type of conventional magnetic coupling device, when there is a rotation speed difference between the input rotation speed and the output rotation speed, the drive side At the relative rotational positions before and after the rotational position at the moment when the magnets of the member and the driven member correctly face each other, the magnetic drive rotational forces are in opposite directions, so synchronous rotation is achieved from the beginning. There was a problem in that large rotational force could not be transmitted except when

In view of the above problems, the present invention is capable of transmitting rotational force even when there is a large difference in rotational speed between the input rotational speed and the output rotational speed, and furthermore, the drive side member is constantly rotated. The purpose of the present invention is to provide a magnetic coupling device that can control the start and stop of the driven member in a state where

[Means to solve the problem]

According to the present invention, the above-mentioned problem is solved by comprising a driving side member and a driven side member that are rotatably supported to perform power transmission in a non-contact manner using magnetic force, and these members are opposed to each other. Hold each of the interlockable macnets by magnetic coupling of phase U in the position to obtain, and furthermore, when transmitting power ~
The problem is solved by a coupling device characterized in that a power rectifying element that transmits only directional rotation is provided in the power transmission system of either the driving side member or the driven side member.

Further, in the above configuration, a magnetic force blocking element is provided for controlling the magnetic force acting directly between the magnets held by each of the driving side member and the driven side member and capable of magnetically coupling with each other. The problem is solved by a connecting device characterized by:

[For production]

Since the configuration of the present invention is as described above, at the time of startup, the magnet held by the drive side member rotates,
When the stationary driven member A approaches the front position facing the opposite polarity of the magnet held by the driven member A, a rotational force in the direction opposite to that of the driving member acts on the driven member. Since a power rectifying element that transmits rotation in only one direction is provided in the power transmission system, reverse rotation torque is not transmitted, and only intermittent forward rotation torque is transmitted to the driven side. Therefore, the driven member slowly and surely begins to rotate in the same direction as the driving member, gradually increasing the speed, and finally, both 4? without contacting each other. The magnets) reach a synchronous rotation in which the sotos face each other and maintain a constant relative position.

To move from the power transmission state to the cutoff state, the magnetic force cutoff element is activated, the magnetic force acting directly between the two magnets is controlled and weakened, and when it is finally cut off, the synchronous rotation The driven member slowly decelerates due to the load and struggles to stop.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an example in which the magnetic coupling device of the present invention is applied to a vehicle air conditioner. The refrigeration cycle for vehicle air conditioning, which is the same as the conventional one, includes a condenser 100 that liquefies and condenses high-temperature, high-pressure refrigerant discharged from the compressor 2, and a liquid tank 110 that has a desiccant for absorbing and removing moisture in the liquid refrigerant.
, an expansion valve 120 that adiabatically expands the liquid refrigerant and brings it into a spray state.
, an evaporator 130 in which liquid refrigerant in a spray state is vaporized and exchanged with the surroundings. At the end of the compressor 2, there is a magnetic clutch 1 as a coupling device of the present invention.
is provided, and power from a prime mover (not shown) is transmitted to the magnetic clutch 1 via a belt (also not shown). Then, the compressor 2 is started and stopped 1- by the engagement and disengagement of the first and second clutches 1.

The magnetic clutch 1 uses magnetic force, that is, a magnet, as a coupling force to transmit power in a non-contact manner.A first embodiment of the clutch 1 will be outlined with reference to FIG.

In the clutch 1, a ball bearing 13 is provided in a cylindrical support portion 12 that is formed integrally with a partition member (made of a non-magnetic material) 9 of a compressor 2, for example. A pulley 10 rotated from a prime mover via a belt is fitted into and fixed to the outer ring of the ball bearing 13. Further, on this pulley 10, an auxiliary magnet 11 is bonded and fixed to the cylindrical inner diameter surface 4 as shown in the figure. Further, the refrigerant inside the compressor 2 is completely sealed by the partition member 9 described above. In the inner cylindrical space of the sealed opening member 9, an inner machining net 8 is arranged so as to face the aforementioned outer machining throat I1 with the gap and the cylindrical portion of the partition member 9 being separated. The inner magnet 8 is fixed in contact with the outer periphery of the yoke 15. There is.

Furthermore, the aforementioned facing outer magnet 11
In the air gap between the magnetic force and the inner machining section 1-8, there is a magnetic force that can freely enter and exit the air gap as a magnetic force blocking element to control this magnetic force. A cylinder 4 made of material or the like is provided.

Finally, we will discuss the steady state of operation. As a first step in explaining the operation, it is assumed that power is supplied to the compressor 2 by the rotation of a heald (not shown) driven by a prime mover (not shown), and the compressor 2 is rotating.

Due to the rotation of the rotor, the pulley 10 rotates, and the outer machining wheel 1-11, which is fixed integrally with the pulley 10, also rotates. At this time, between the outer magnet 11 and the inner magnet 8, there is an attractive force and a repulsive force caused by the magnet.

Due to the magnetic force of this magnet, the outer magneto [・1
Along with the 10 rotations, the inner mucknet 8 also performs the same rotation. The state of the magnetic force at this time is a magnetic circuit schematically shown in FIG.
The inner mucknet 8 also rotates in the same rotational direction as the +I O and the outer mucknet 11. At this time, since the cylindrical portion of the partition member 9 disposed in this gap is made of a non-magnetic material as described above, it does not interfere with the magnetic force. Due to this rotation of the inner magnet 8, the yoke 15, which is bonded and fixed, also rotates in the same manner. This rotation of the yoke 15 is transmitted to the one-way clutch 7, which is a power rectifying element. During steady power transmission, the rotational force is approximately constant, and the main shaft 6 of the compressor 2 is always driven in a constant direction via the one-way clutch 7.

In addition, in the compressor 2 using a conventional clutch, the main shaft 60
Since a contact rotary seal mechanism is used to seal the rotating parts, a small amount of refrigerant residue may always leak into the atmosphere. 1-7 However, when the glue notch of this embodiment is incorporated into a compressor, the entire tip portion of the housing unit 2 can be fixedly fixed by the cutting member 9 having a concave cylindrical hollow shape. Since it can be covered and sealed, refrigerant leaking from the compressor is completely contained and does not leak outside.

Next, when the air conditioner switch inside the vehicle is turned off,
The operation of stopping the rotation of the compression unit 2 will be described.

Talented in the 11th RI? 1. When the air conditioner switch inside the vehicle (not shown in the figure) is located inside the cylinder of the partition member 9, there is a cylinder (magnetic force blocking The element) 4 is inserted into the gap between the outer magnet 8 and the outer magnet 8 by an external moving means (not shown). The length of the cylinder 4 in the axial direction has the above-mentioned axial length of the air gap and the length of the gap, and its thickness is set so that saturation does not occur due to the amount of magnetic flux G in the air gap. It has sufficient thickness. Therefore, when the cylinder 4 is located in the gap between the outer magnet 11 and the inner magnet F8, the magnetic force L1 generated by each magnet in the gap is:
As shown schematically in FIG. 3, the field 4 constitutes a magnetic circuit that is an innovation of magnetic circuit A and magnetic circuit B, respectively. Therefore, in this magnetic circuit configuration, even when the pulley 10 rotates in the direction shown by the arrow in the figure, the magnetic force generated by the outer magnet 11 is not transmitted to the inner magnet 8, so no power is transmitted. Inner magnet 8 does not rotate. Due to this action, even if the pulley 10 on the power input side is constantly rotating, the transmission of power to the compressor 2 is cut off, and the compressor 2 is brought to a halt.

When starting the compressor 2, by moving the cylinder 4 mentioned above from the gap between the outer magnet 11 and the inner magnet 8, the magnetic circuit in the gap is
[The configuration shown in 114b becomes the configuration shown in FIG. This is what we do.

However, with this alone, the compressor 2 cannot be started for reasons described later. Therefore, the operation of the one-way clutch 7 for starting the compressor 2 will be described in detail below with reference to FIGS. 1 and 2.

In the above-mentioned starting operation of the pressure III machine 2, immediately after starting, the outer magnet 11 is activated as described above.
The magnetic circuit in the gap between the magneto and the inner magneto 18 changes from the state shown in FIG. 3A to the state shown in FIG. . However, the necessary transmission force to rotate the compression a2 immediately after starting the compressor 2 is the steady transmission force necessary for the compression a2 to perform pumping work (including mechanical loss, etc.), and the compression It consists of the transmission force corresponding to the moment of inertia for rotating the rotating parts such as the main shaft 6 of the machine 2. It is well known that immediately after starting the compressor 2, the transmission force corresponding to the moment of inertia I- of the transmission force necessary to rotate the compressor 2 is very large. Therefore, immediately after starting the compressor 2, the pulley 10 in FIG. 1 is constantly rotated by a prime mover (not shown), but the inner magnet 8 is not rotating. In this state, if there is a difference in the rotation speed between the outer magnet 11 and the inner magnet 8, the inner magnet 8
Attractive force and repulsive force by the outer magnet 11 act repeatedly on the outer magnet 11. Due to the action of this magnetic force, the yoke 15, which is integrally constructed with the inner magnet 8, has the same positive and negative magnitudes as shown in FIG. 2a, and the outer magnet 1
1. A transmission force acts with a period twice the distance between adjacent magnets of each inner magnet 8. For this reason, the transmission force transmitted to this yoke 15 is a periodic function with equal positive and negative magnitudes, so if the transmission force of this yoke 15 is simply input to the main shaft 6 of the A-compressor 2, the main shaft 6 does not rotate.

Therefore, by using the one-way clutch 7 provided between the yoke 15 and the main shaft 6, the yoke 15 shown in FIG.
As shown in FIG. 2(b), the transmitted force is canceled out only in the portion having a negative magnitude, and the transmitted force is rectified. The transmission force rectified by this one-way clutch 7 is
Since the transmitted force has a value of W, by inputting this to the main shaft 6 of the compressor 2, the main shaft 6 can be rotated.

Here, among the transmission forces necessary to rotate the compressor 2 mentioned above, the transmission force corresponding to 1 - of the moment of inertia for rotating the rotating parts such as the main shaft 6 is equal to the rotation speed of the main shaft 6 etc. It is known that it becomes smaller as it rises. Therefore, due to the intermittent input of the power rectified by the one-way clutch 7 to the seven wheels 6, the rotation speed of the main shaft 6 gradually increases, and finally the outer magneto I.
The rotational speed becomes the same as l1, the rectification of the transmission force by the one-way clutch 7 is achieved, and the starting operation of the compression a2 is also achieved.

Next, the first embodiment will be specifically explained in more detail.

First, according to FIGS. 4 and 5, the aforementioned power rectifying element (
one-way clutch 7), and magnetic force cutoff element (cylindrical 4
) will be explained in more detail.

As shown in FIG. 5, the outer magnet 11 bonded and fixed to the cylindrical inner surface 14 of the pulley 10 is a permanent magnet having a bow-shaped shape, and the magnetization direction is the direction toward the central axis, i.e. A plurality of magnets are arranged in the radial direction so that adjacent magnets have different surface magnetic rods, and are fixed with an adhesive or the like. The inner magnet 8 is arranged so as to face the inner cylindrical space of the partition member 9, with a gap between the outer magnet 11 and the inner cylindrical space. This inner magnet 8 also has the same magnetic pole arrangement as the outer magnet 11 described above, and is bonded and fixed to the yoke J5.

A bearing 16 is fitted into the yoke 15, and is rotatably supported by the main shaft 6 of the compressor 2. In addition, this main shaft 6
The holder 17 rotates integrally with the main shaft 6 using the key 18.
is provided. The one-way clutch 7, which is the power rectifying element, is arranged so as to be in sliding contact with the outer peripheral surface 17a of the holder 17 and the inner diameter surface 15a of the yoke 15, respectively.

Next, we will explain the structure of the magnetic force shielding element (a certain cylinder 4C) located in the gap between the outer machining point 11 and the inner machining point 8. In one embodiment, a piston 4 is installed). -1, so is it a compaction machine? 3's inner diameter round sleeve crest i: (a, the piston 4, ] is inserted into the piston 4, I or 1); Ru. Furthermore, 0 links 4b and 4c are installed for sealing the two sliding parts. Furthermore, the piston 42
A splinter 24 is provided for pushing 11T toward the right in the figure. Further, the inner cylindrical space of the inner diameter cylindrical surface 3a of the Freon I/housing S3 forms a piston chamber 4], and a passage 42 (not shown) for supplying high-pressure fluid and a control valve in the middle passage of the passage 42 are provided. The configuration is such that there are five.

Next, the configuration of the magnetic circuit will be described. This Example G Koogero magnetic circuit has a pulley 10 in FIGS. 4 and 5.
, Outer Makuino I・11, Inner Magneso]・8
, and a yoke 15. Also, Outer Maguino I/11 and Inner Maguino!・The cylinder 4, which is an air force blocking element inserted into the gap between the cylinder 4 and the piston 4a, also forms a part of the H circuit 1 when inserted. In this case, the outer magnet 11, the inner magnet 8 are permanent magnets, the pulley 10, the yoke 15,
The piston 4a is made of a ferromagnetic material or a material with high magnetic permeability.

- Similarly, the partition member 9 interposed between the outer magnet 11 and the inner magnet 8 is made of a non-magnetic material or a material with low magnetic permeability, such as aluminum or an aluminum alloy.

Here, the operation of inserting the magnetic force interrupting element into the gap between the outer magnet 11 and the inner magnet 18 by means of external means will be described in detail with reference to FIG. In this embodiment, in order to achieve the insertion of the cylinder 4, which is the magnetic force blocking element, that is, the piston 4a, a control valve 5 is used to control the force caused by the fluid and its pressure. When a voltage is applied to the coil 19 of the control valve 5, an attractive force Q acts between the coil end face 19a and the plunger 20, so that the silansha 20
and a ball 2 that is integrated with the plunger 20.
1. Also in the hole 22, the planer 20 is connected to the coil end surface 11]
Move until it comes into sliding contact with a. This movement of the hole 22 causes the piston chamber 41 to pass through the passage 42 which is in communication with a high 11 fluid generating section (not shown). As a result, the pressure in the piston chamber 41, which has become high pressure, is reduced by the piston 4.
．． 7, the pushing force of the splinter 24 for pressing the piston 4a in the right direction in the figure overcomes the force, moves the piston 4a to the left in the figure, and connects the outer magnet 11 and the inner magnet 1-0. inserted into the gap between the This operation achieves the stop operation of the compressor 2.

Next, a starting operation, which is a process during which the compressor 2 moves from a stopped operation to a steady operating state, will be described.

In order to achieve this starting operation, first, as shown in FIG. This is accomplished by moving out of the gap by an external force (not shown). This cylinder 4
The operation of the movement will be explained with reference to FIG. Cylinder 4
That is, the movement of the piston 4a is achieved by stopping the energization to the coil 19. Zunawa'J % By stopping the energization of coil 19, the coil level is 1: 19
Since the suction force between a and the plunger 20 disappears, the spring 23 causes the hole 21 and the pole 22 to move toward the plunger 2.
0, the ball 22 is pushed to the right in the figure, cutting off the communication between the piston chamber 41 and the passage 42 through which the ball 22 supplies high pressure. On the other hand, the piston chamber 41 and the spring chamber 25 are electrically connected to each other via the passage 43 by the simultaneous G pole 21 .

As a result, the pressures in the screw chamber 41 and the spring chamber 25 are balanced. The piston 4a has a spring 24
Accordingly, Outer Makuino 1 to 11, Inner Magne 7
Since it is pushed with enough force to overcome the magnetic force exerted by 1-8, it is moved to the right in the figure. By operating this control valve 5, the screw 1-4a is moved from the gap between the outer magnet 11 and the inner magnet 8.

Here, the operation of the power rectifying element, that is, the one-way clutch 7 will be specifically described with reference to FIGS. 4 and 5. In FIG. 5, the pulley 10 is constantly rotated in the right direction of the arrow in the figure by a prime mover (not shown). Accordingly, the outer magnet 11 fixed to the pulley 10 also rotates constantly in the right direction in the figure. Here, the piston 4a moves to the right in FIG. 4, and the one-way clutch 7 starts operating.

As described above, the rotational force shown in FIG. 2(a) is transmitted to the yoke 15 that is integrated with the inner magnet 8. In Fig. 2(a), in the C process shown in the figure,
Since the rotational force has a positive value, the one-way clutch 7 engages with the yoke inner diameter surface], 5a and the holder outer diameter surface 17a in FIGS. (C process in Figure 2). At this time, the rotation direction of the holder 17 and the main shaft 6 which is integral with it is the right direction in FIG. The rotational speed is very small in this C process.

Next, when the transmission force at the yoke 15 in FIG. 2(a) is about DilZ, the transmission force is a negative value, so in FIG.
The yoke 15 rotates to the left in the figure, which is opposite to the rotation direction of the pulley 10. However, in this direction of rotation, the one-way clutch 7 does not engage with the q-hook inner diameter surface 15a and the holder outer diameter surface 17a, so no rotational force is transmitted to the main shaft 6 integrated with the holder 17. (Figure 2(b) D
J degree). Furthermore, in the E process of FIG. 2(a), the rotational force acting on the yoke 15 becomes a positive value again, and the rotational force is transmitted to the main shaft 6 similarly to the C process. At this time, since the rotational speed of the main shaft 6 is very small in the previous process, C process, the transmitted force of the moment of inertia portion is reduced in the E process. Therefore, the rotational speed of the main shaft 6 to which rotational force is applied again in the E process is higher than that in the C process. By repeating the above process, the rotational speed of the main shaft 6 gradually increases, and finally reaches the same rotational speed as that of the pulley 10 on the input side.

By operating the one-way clutch 7 as described above, the starting operation from stopping the compressor 2 to starting the compressor 2 is achieved.

In this embodiment, when the compressor is in stop operation, that is, when the piston 4a is inserted between the outer magnet 11 and the inner magnet 8, the cross section of the piston 4a as shown in FIG. In some cases, magnetic circuits A and B each have magnetic paths having flows in opposite directions. Therefore, eddy currents are generated near the boundaries of these respective magnetic paths, and the piston 4
Inside a, some heat is generated due to Joule heat. However, since the screw 1 hem 4a is disposed inside the sealed partition member 9, the piston 4a is cooled by introducing the refrigerant sucked into the compressor 2, which is liquefied at a low temperature in the refrigeration cycle, therein. , the heat generation due to the eddy current within the cross section of the piston 4a will not be a problem.

Next, the configuration of the second embodiment will be described below.

The configuration that differs from the first embodiment described in FIGS. 4 and 5 is the specific structure of the magnetic force blocking element, so the configuration of that part will be described.

It is possible to replace at least one of the outer magnet 11 that is integral with the pulley 10 and the inner magnet 8 that is integrated with the yoke 15 described in FIG. 4 with an electromagnet. Therefore, the structure of a second embodiment in which the outer magnet 11 is replaced with an electromagnet will be explained using FIG. 6.

A plurality of cores lla are arranged on the inner diameter surface 14 of the boot IJ10 so as to face the inner magnet 8. its core
The shape and arrangement of a are similar to those of the outer magnet 11 in FIG. A coil 28 is provided around each core lla. Here, the winding direction of the coil 28 is the core lla
The adjacent ml alla are wound in the opposite direction. Each coil 28 is connected to a bar 27, respectively.

This bar 27 is in sliding contact with the CC blank 6 through a slip link 34, and its flange 2 Ei is connected to the Lee I wire 29 by 3.
, is connected to the voltage VF (not shown). In addition, the flage 2G is the flaso porter fixed to the
The configuration is held at 30.

Further, the main bearing 13 fitted and fixed to the pulley 10 is pivotally supported by the cylindrical portion of the head 310 via the partition member 9. The other configurations are the same as those in the first embodiment, so their explanation will be omitted.

Next, the operation in this second embodiment will be described.

The operations of the second embodiment differ from those of the previous embodiments in the above-mentioned steady operation, stop operation, start-up I-), stop I-, and the first stage of start-up of the compressor 2. , this operation will be described in Figures 1 and 6. Figure 1 U),
Part of the stopping and starting operations of the compressor 2 is due to the movement of the cylinder 4, which is an element that interrupts magnetic force. Use J coil 8. Zunawa 14,, 21 Ile 2
33 due to the current flowing through the core], 1. Control the magnetic force that causes "a to emit", 7, -I for a and inner mak, 1
By controlling the magnetic force applied to the air gap between the compressor 2 and the compressor 2, part of the stopping and starting of the compressor 2 is achieved. This operation will be described in detail in Section G-1. The coil 28 is connected to the leet wire 29 from a voltage supply source (not shown).
, a current is applied through the flange 2 [i,)\-27. At this time, each =1 coil 28 has a winding horn direction opposite to that of the adjacent coil 28, so the core
The poles of a + Y+ are next to each other! Very different. Thereby, the operation is achieved by the same function as the 11th outer magnet 11. As is clear from this, coil 2
A part of the stopping operation is achieved by applying the voltage to the coil 8, and a part of the starting operation is achieved by applying the voltage to the coil 28.

With this configuration and operation, the cylinder 4 (
Since the magnetic force of the air gap can be cut off without moving the piston 4a) into and out of the air gap 2), an insertion/removal mechanism is not required, and the clutch can be made smaller. Furthermore, since there is no need to insert the cylinder 4 into the gap, it is possible to reduce the gap between the gaps, thereby increasing the transmission capacity and making it possible to use inexpensive magnets.

From the configuration and operation described in 1-1 above, in a closed mechanism that does not leak the refrigerant of the compressor 2 to the outside and a mechanism that transmits rotational force without contact, the compressor 2 can be operated at any steady state or stopped. l
- It becomes a clutch or mouth function with one movement of operation and start-up.

Although the control valve 5 is normally closed, it goes without saying that it can also be normally open.

In addition, it can be used not only as a clutch for a compressor for air conditioning, but also for devices that do not want fluid leakage, such as a circulation system for strongly acidic chemicals or a transport system for fluids containing radioactive materials. It is obvious that 7) is also valid.

In addition, in the first and second embodiments, the one-way clutch 7, which is a power rectifying element, is arranged between the inner magnet 1-8 and the main shaft 6 of the compressor 2. Pulley lO and 7 Utermakunenoto 11
Even if a one-way crannow F-7 is installed between the motor and the pulley 10, or a one-way crane or chia is installed between the prime mover and the pulley IO (not shown in the figure). 9-1 The operation for the above-mentioned startup
In either case, the first,
The operation is similar to that of the second embodiment.

Since the embodiment of the present invention uses a non-contact transmission mechanism, when this is used for the drive shaft of a refrigerant compressor, etc., the refrigerant scum etc. are completely sealed from the partition wall ζ of the head front, etc., and there is no leakage. This makes it possible to realize a clutch with extremely high safety.

Further, in this embodiment, torsional resonance etc. can be completely absorbed by the gap which is a non-contact part, and a special absorption mechanism is not required, and the size can be reduced. Furthermore, since it is a non-contact power transmission mechanism, there are no mechanical sliding parts, so there is no deterioration due to wear etc., and reliability can be greatly improved. Also, because it is based on magnetic force, freezing (
An abnormality has occurred in the J cycle and the compressor has been damaged.
! Even in the case of a lfl load, the compressor cannot be rotated by more than the magnetic force transmission torque (9G), so it has an overload prevention function without the need for a special mechanism, and can be used in the event of an abnormality in the refrigeration cycle. Damage etc. can be minimized.

In addition, since the magnetic clutch of this embodiment has no mechanical connection, it is possible to significantly reduce the operating noise, and furthermore, the large size of the magnetic clutch can be reduced in size.
Also, it becomes possible to use inexpensive magnets, and cost reduction becomes possible.

〔Effect of the invention〕

In the coupling device of the present invention, due to the provision of the power rectifying element and the above-mentioned action, even when the rotation speed is 5 degrees due to the input rotation speed and the output rotation, the input side rotation speed can suddenly change during steady rotation. It is possible to always transmit rotational force even when the load on the output side suddenly changes.

In the invention of claim 2, by providing the magnetic force interrupting element, it is possible to control starting and stopping of the driven side member while the driving side member is constantly rotating.

Furthermore, in the invention of claim 2, since the power connection is the magnetic force in the gap between the outer magnet and the inner magnet, each time the operation of the magnetic force interrupting element is controlled steplessly, Stepless control of the magnetic force in the gap, L7, and therefore stepless control of the transmission force is possible.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a first embodiment of the magnetic coupling device of the present invention, FIGS. 2(a) and (b) are characteristic diagrams showing changes in transmission torque corresponding to the rotation angle of the drive shaft, Figure 3 (a), (
b) is a partially enlarged cross-sectional view for explaining the action of the magnetic force blocking element according to the present invention, FIG. 4 is a longitudinal cross-sectional view showing details of the first embodiment of the present invention, and FIG. A cross-sectional view showing the A-A cross section, FIG. 6 is a longitudinal 1
It is a tJi plane view. 1...Clutch, 2...Compressor, 3...
・Freon 1~Housing, 4...Cylinder, 4a...Bis 1-N,
5...Control valve, 6...Main shaft of compressor,
7... One door, 8... Inner magnet, 9... Partition member, 10... Pulley, 11
...Outer magnet, ++a...Core, 12...Cylindrical support part, 15...Yoke, 24...Spring, 26...Brush, 28...Coil, 3
DESCRIPTION OF SYMBOLS 1... Head, 34... Slip ring, 41... Piston chamber, 42... High pressure fluid supply passage, 100... Condenser, 110... Liquid tank,
120... Expansion valve, 130... Evaporator.

Claims (1)

[Claims] 1. A driving side member and a driven side member are rotatably supported in order to transmit power in a non-contact manner using magnetic force, and these members are arranged in positions where they can face each other. A power rectifying element that respectively holds magnets that can be interlocked by magnetic coupling and transmits only rotation in the driving direction when transmitting power is provided in the power transmission system of either the driving side member or the driven side member. A magnetic coupling device characterized by being provided with. 2. A magnetic force blocking element is provided for controlling the magnetic force acting directly between the magnets held by each of the driving side member and the driven side member and capable of being magnetically coupled to each other. The magnetic coupling device according to claim 1.