JPH05574B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel configuration for an electromagnetic clutch, and its object is to obtain an electromagnetic clutch that can be digitally controlled and has an exceptional effect compared to known electromagnetic clutches. be.

The purpose of a well-known electromagnetic clutch is to connect and disconnect a rotating system by controlling energization. Since it is activated by the presence or absence of an electrical signal, it is easier to control than other clutch devices. Therefore, it has found a wide range of uses. However, there are some drawbacks as described below.

First, there is a drawback that the current supplied is extremely large compared to the transmitted torque, and therefore a large capacity power source is required. Secondly, there is a drawback that a large impact sound is generated during operation. Thirdly, since torque is transmitted by frictional coupling of the clutch plates, there is a drawback that wear is involved and, therefore, the service life is limited. Fourth, since the torque transmission control is only on/off and involves slip, it is digitally controlled, that is, transmission of rotation at a predetermined angle in response to one pulse input is performed without integration error. This has the disadvantage that it is impossible to perform it accurately without

The device of the present invention has succeeded in completely eliminating the above-mentioned drawbacks, and can control the transmission of large torques using extremely small pulsed electrical inputs.
It operates quietly without producing mechanical noise, has no worn parts, provides long service life, and has the characteristics of being able to control the rotation angle or moving distance of the load in accordance with the number of input electrical pulses. It also has the feature of being able to take out multiple outputs from a single drive shaft.

Because of the above characteristics, the clutch can be used in place of the well-known electromagnetic clutch and can bring about remarkable new and excellent effects.

Therefore, it is necessary to use a reciprocating device for the manuscript table or illumination device of a copying machine, a driving source for operating a sewing machine needle, a driving source for a printer, a control device for opening and closing a valve for adjusting the flow rate of liquid, and various automatic machines (vending machines, vending machines, etc.). This has the effect of providing effective technology that can be applied to robots, etc.).

Next, details of the apparatus of the present invention having the above-mentioned features will be explained with reference to the embodiments shown in FIGS.

In FIG. 1, the support shaft 2a provided on the main body has
A first rotating lever 3 (hereinafter simply referred to as lever 3) and a second rotating lever 3a (hereinafter simply referred to as lever 3a) are supported so as to be able to rotate independently. The gear 2 also has a support shaft 2a.
It is rotatably supported. The gear 2 serves as an output gear, and the load 1 is driven through a rotation transmission system (not shown).

A support shaft 4a provided at the free end of the lever 3 rotatably supports an eccentric rotating ring 4c, a gear 4b, and a non-eccentric rotating ring 4, which are made in one piece. A rubber ring is placed on the circumference of the rotary ring 4, and the rubber ring comes into contact with and separates from the rotary ring 5b. The rotating wheel 5b is a rotating shaft 5a of an electric motor (acting as a prime mover), not shown.
It is fixed to .

The yoke 7 is fixed to the main body, and an excitation coil 8 is attached to it. A lever 9 is rotatably supported on a support shaft 7a provided on one leg of the yoke 7, and is resiliently repelled by a spring in the counterclockwise direction of the arrow. Symbol 9b is an abutment pin provided on the main body, which prevents the lever 9 from rotating.

When the rotating wheel 4 is rotating by receiving power transmitted from the rotating wheel 5b, the load 1 is being driven by the gear 4b and the gear 2 that meshes with the gear 4b. At this time, due to the reaction of the load caused by the clockwise rotation of the gear 4, the lever 3 also receives torque in the same direction, increasing the pressing force between the rotating wheels 4 and 5b in accordance with the load, so that the power is increased. This has the effect of ensuring communication. Also, at this time, the lever 3a is moved by the eccentric rotating wheel 4.
Since it is in sliding contact with c, it reciprocates from side to side. At this time, the excitation coil 8 is energized and the lever 9 is attracted to the yoke 7, so the slope 9c does not come into contact with the locking portion 3b of the lever 3a. When the excitation coil 8 is de-energized,
The lever 9 is spring packed, and the locking portion 3b of the reciprocating lever 3a comes into contact with the right side of the slope 9c of the lever 9. When the rotating wheel 4c further rotates, the lever 3 receives counterclockwise torque and rotates.
The rotating wheel 4 is separated from the rotating wheel 5b serving as a drive source, and power transmission is cut off. Therefore, load 1 also stops.

Next, when the excitation coil 8 is energized, the lever 9 is attracted to the yoke 7, and the aforementioned lever 3a is unlocked, so that due to the elastic force of the spring 6,
The lever 3 rotates clockwise together with the lever 3a, compresses the rotating wheels 4 and 5b, and starts power transmission. The subsequent driving of the load is as described above. Therefore, the spring 6 only needs to be weak, and the input power to the excitation coil 8 can also be small. The spring 6a may be even weaker since it is sufficient to simply contact the lever 3a with the eccentric rotating wheel 4c. Also, the spring 6a may be applied between the levers 3 and 3a.

When the rotating ring 5b is pressed against the rotating ring 4 at a biting angle as shown in the figure, torque transmission increases. However, there is no need to increase the excitation current of the excitation coil 8, and therefore, the electromagnetic clutch has the above-mentioned performance, that is, it is characterized in that it is possible to control a significantly large torque transmission with respect to the operating current.

Furthermore, as can be understood from the above explanation, each time one electric pulse is input to the excitation coil 8, the rotating wheel 4 also rotates once, and the load accordingly advances. Further, while the excitation coil 8 continues to be energized, the load 1 is driven, and when it stops, the load 1 also stops. Although the accuracy of the stepping angle described above varies slightly from step to step, n electrical pulses are applied to the exciting coil 8.
When the load 1 is moved n steps by inputting , the error of the entire movement is not added.
That is, there is a feature that no integration error occurs.

Furthermore, there is no mechanical noise during operation, and there are no parts that wear out. If the torque transmission is controlled and taken out from the same drive shaft by attaching a plurality of them as shown in FIG. 1, it has the feature that a plurality of loads can be controlled independently.

Although the levers 3a and 3 have a common support shaft 2a, they may be separate. Also rotating wheels 4, 5b
It is also possible to use the gears as gears to transmit power through their meshing. In this case, only the gear 4b is used, that is, the rotating wheel 4 is removed,
Gears 4b and 5b can be used by directly meshing with each other.

Next, in the embodiment shown in FIG. 2, the pulley 1 serving as the driving source
This is an example in which the pulley 14 is driven from 0 through the belt 11. Components with the same symbols as those in the previous embodiment are the same members, so a description thereof will be omitted. The pulley 10 is fixed to a rotating shaft 10a of a prime mover (not shown).

A spindle 14a provided on the lever 12 has a pulley 14 made in one piece, a gear 14b, and an eccentric rotating wheel 14.
c is rotatably supported. Pulley 10,1
4 is rotation in the counterclockwise direction of the arrow, so gear 14b
However, the reaction force exerted by the gear 2, which acts as a load, tensions the belt 11, thereby ensuring reliable power transmission. Therefore, the spring 15 need only be weak, and the power applied to the excitation coil 18 of the electromagnetic locking device for locking the lever 12a may also be small. While the excitation coil 18 is energized, the lever 12a reciprocates left and right, and the load 1 is driven. However, when the excitation coil 18 is de-energized, the magnetic path of the magnetite 16 (fixed to the lever 12a) is closed by the yoke 17 fixed to the main body, so the lever 12a is locked. Furthermore, by rotating the eccentric rotary wheel 14c at a slight angle, the lever 12
is rotated clockwise, and the belt 11 is relaxed. Therefore, load 1 also stops. When the excitation coil 18 starts to be energized, the lever 12a is unlocked, so the levers 12, 12a rotate counterclockwise due to the action of the spring 15, and the belt 1
1 and power transmission begins. Furthermore, lever 1
2, 12a independently on the support shaft 2a provided in the main body,
The gear 2 is similarly supported to rotate independently,
Furthermore, gears 2 and 14b are in mesh with each other. Also, when the excitation coil 18 is energized, the generated magnetic flux cancels the magnetic flux of the magnet 16, and the yoke 1 of the lever 12a
7 is released. The spring 15a presses the lever 12 against the eccentric rotating wheel 14c.

As can be seen from the above explanation, when a plurality of electric pulses are inputted to the excitation coil 18, the load 1 can be stepped in accordance with the number of pulses. Other effects are also the same as in the previous embodiment.

As can be understood from the description of the embodiments shown in FIGS. 1 and 2, the present invention achieves the objects stated at the beginning and is highly effective.

[Brief explanation of the drawing]

1 and 2 respectively show different embodiments of the device according to the invention. 1...Load, 3, 3a, 12, 12a, 9...
Lever, 2a, 4a, 14a, 9a...support shaft,
2, 4b, 14b... Gear, 5a... Rotating shaft, 5
b, 4... Rotating wheel, 10, 14... Pulley, 11
... Belt, 4c, 14c ... Eccentric rotating wheel, 7,
17... Yoke, 8, 18... Excitation coil, 9c
... Slope, 3b ... Locking part, 6, 6a, 15, 1
5a...Spring, 16...Magnet.

Claims (1)

[Scope of Claims] 1. A drive rotary wheel driven and rotated by a prime mover, a first lever and a second lever rotatably supported by a support shaft provided on the main body, and the first lever and the second lever. a first gear rotatably supported on a support shaft provided at the free end of the first lever; a non-eccentric rotating wheel rotatably supported on a support shaft provided at the free end of the first lever; a second gear that meshes with the first gear; an eccentric rotating wheel that is coaxial with the gear and rotates synchronously with the first gear; a spring that resiliently biases the second lever so as to press against the eccentric rotating wheel; By electromagnetically locking the free end of the second lever and the torque transmission device for driving the rotating wheel that is not eccentric by the rotating wheel, the first lever can be rotated along with the rotation of the eccentric rotating wheel. At least an electromagnetic locking device that stops the torque transmission of the torque transmitting device when the second lever comes into contact with the vicinity of the minimum deflection point of the eccentric rotating wheel, and a locking of the second lever by the device. When the is released,
Through the elastic force of the spring applied to the first lever, torque transmission by the drive rotating wheel to the non-eccentric rotating wheel is started, driving the first gear, and corresponding to the magnitude of the load. When the mechanism for increasing the torque transmission force described above and the locking action by the electromagnetic locking device described above are restored, when the second lever reciprocating in contact with the eccentric rotating wheel approaches, it is locked. An electromagnetic clutch device characterized by comprising a mechanism for holding the clutch. 2. In the first claim, the belt placed between the drive rotating wheel and the non-eccentric rotating wheel is tensioned by the elastic force of a spring placed between the first lever and the main body. 1. An electromagnetic clutch device comprising a torque transmission device that transmits torque between the two by doing so. 3. In the first claim, the drive rotating wheel and the non-eccentric rotating wheel are brought into pressure contact with each other by the elastic force of a spring applied between the first lever and the main body, thereby transmitting torque between the two. An electromagnetic clutch device comprising a torque transmitting device.