JPS61241533A - Electromagnetic clutch brake device - Google Patents

Abstract

PURPOSE:To enable the amount of a slip to be adjusted easily by separating by function surface from a contact surface. CONSTITUTION:Either one of a driving body or a driven body is formed into a male-side cone body 30 having both a suction surface 31, which meets the axis of a body of revolution 10 at right angles, and a conic outer peripheral contact surface 32. The rest is formed into a female-side cone body 40 having both a suction surface 41 and an inner peripheral contact surface 42, both of which face the suction surface 31 and the outer peripheral contact surface 32 of the male-side cone body 30, respectively. In addition the male-side cone body 30 and the female-side cone body 40 are constituted in such a manner that, when a coil 33 is electrified, their contact surface come into contact, while their suction surfaces do not contact with each other. With this contrivance, the amount of a slip can be adjusted easily.

Description

[Detailed description of the invention] "Technical field" The present invention relates to an electromagnetic clutch brake device.

"Prior Art and Problems Therewith" As is well known, an electromagnetic clutch/brake device performs a clutch or brake action by electromagnetically bringing a driving body and a passive body, which are arranged to face each other, into contact and separation. In other words, when the driving body and the passive body are both supported on a rotating body, they function as a clutch that transmits the rotation of the driving body to the passive body, and when the passive body is fixed and provided, they function as an electromagnetic brake that stops the rotation of the rotating body. .

Conventionally, the driving body and the passive body of this electromagnetic clutch/brake device are made of a flat plate made of magnetic material, and the attraction surface thereof directly contacts the other side. Therefore, there was a problem in that the transmitted torque could not be increased very much. In other words, the transmitted torque is
It depends on the magnetic attraction force of the coil and the contact area between the driver and passive body, but if the amount of current to the coil is constant, the driver and passive body must be made larger in order to increase the transmitted torque. Therefore, it cannot be used for small equipment. Furthermore, since the driving body and the passive body must be made of a magnetic material that is attracted by magnetic force, it is difficult to use a material with excellent friction properties only for the friction surfaces, which poses a problem in terms of durability. For this reason, conventional electromagnetic clutch brake devices
Integrating the driving body and the passive body as quickly as possible; in other words, a clutch transmits the rotation of the driving rotating body to the driven rotating body without slipping, and a brake immediately stops the rotation of the driving rotating body. This was the main purpose. In other words, in the conventional electromagnetic clutch brake device,
Sliding between the driving body and the passive body is seen only as a negative image, and the use of controlling the rotation speed of the passive body or applying the brakes slowly is not considered. This is because the materials of the driving body and the passive body are limited to magnetic materials, so there was no concept of causing slippage.

``Purpose of the Invention'' The present invention is based on an idea different from the conventional electromagnetic clutch brake.Firstly, it is small but can transmit large torque, and secondly, the electromagnetic clutch brake is capable of adjusting the transmitted torque. The purpose is to obtain a clutch brake. The transmission torque can be adjusted by controlling the amount of slippage that occurs between the driving body and the passive body, and an object of the present invention is to obtain an electromagnetic clutch/brake device that can easily adjust the amount of slippage. do.

"Summary of the Invention" The present invention breaks the common sense that an electromagnetic clutch brake device originally has a driving body and a passive body in the form of a flat plate, and that the suction surface is the immediate contact surface. This was done based on the idea of giving a degree of freedom to the properties of the contact surface by separating the driving body and the passive body. The other cone body is composed of a male side cone body having an outer circumferential contact surface, and the other side is composed of a female side cone body having a suction surface and an inner circumference contact surface opposite to the suction surface and outer circumference contact surface of the male side cone body, The male cone body and the female cone body are characterized in that when an electromagnetic body is energized, the contact surfaces of the male cone body and the female cone body come into contact with each other, and the suction surfaces thereof do not come into contact with each other.

A conical contact surface is effective in transmitting high torque while maintaining compactness, as is evident from conventional cone clutches. If the contact surfaces are in contact and the attraction surfaces are not in contact, there is no need to consider the friction of the attraction surfaces.On the other hand, the contact surfaces do not participate in magnetic attraction, so their properties can be set freely. be able to. Therefore, it is possible to increase the transmission torque when the maximum current is passed through the electromagnetic body, and also improve the wear resistance when adjusting the transmission torque by sliding the male and female cone bodies. can improve durability. That is, it is possible to make the contact surface slide appropriately depending on the magnitude of the current flowing through the electromagnetic body, and even when the contact surface is made to slide, there is no wear on the suction surface, allowing for long-term use. Further, by separating the functions into the suction surface and the contact surface in this way, it is easy to perform surface treatment on the contact surface or use a material with excellent friction characteristics.

"Embodiments of the Invention" The present invention will be described below with reference to illustrated embodiments. In this embodiment, the present invention is configured as an electromagnetic clutch that transmits transmission to a rotating driven shaft 20 of a rotary sleeve 10. The 0-rotation sleeve 10 is fitted on the outside of the driven shaft 20 with a clearance C, and a bearing is attached to a motor housing 11. It is rotatably supported via 12.

A worm 13 driven by an electric motor is located inside the motor housing 11, and a worm wheel 14 that meshes with the worm 13 is attached to the rotary sleeve 10 with a key 15.
are combined with.

A driving side (male side) cone body 30 is further coupled to the rotating sleeve 10 with a key 16.

This drive-side cone body 30 has a suction surface 31 at its tip that is perpendicular to the driven shaft 20 and a conical outer peripheral contact surface 32, and houses a coil 33 as an electromagnetic body therein. The above elements rotate in fixed positions relative to the rotating sleeve 10 and do not move axially.

A spring retainer ring 17 is fixed to the outer periphery of the driven shaft 20, and the passive side (female side) cone body 40 is restrained from rotation by, for example, spline connection, and can move a minute distance in the axial direction. It is fitted in. This passive side cone body 40 is similar to the drive side cone body 30.
It has a suction surface 41 and an inner circumferential contact surface 42 opposite to the suction surface 31 and outer circumferential contact surface 32 of
These suction surface 41 and inner peripheral contact surface 42 are urged to move in a direction away from suction surface 31 and outer peripheral contact surface 32. The angle θ of the outer circumferential contact surface 32 (inner circumferential contact surface 42) is an angle at which a particularly large transmission torque can be obtained compared to a flat plate, for example, 10
It is best to set it to about ~20@.

The driving side cone body 30 and the passive side cone body 40 are connected to each other by energizing the coil 33 to attract the passive side cone body 40 toward the driving side cone body 30 side.
The shapes of the suction surfaces 31 and 41 are set so that when they are brought into contact with each other, the suction surfaces 31 and 41 do not come into contact with each other while maintaining a small gap.

As is well known, the magnetic attraction force decreases exponentially as the distance between the attracted materials increases, so the spacing between the attraction surfaces 31 and 41 is adjusted so as to obtain the necessary attraction force. Set it to a small value.

The current flowing through the coil 33 can be adjusted by a current adjustment device 34.

In the present electromagnetic clutch device having the above configuration, when the coil 33 is not energized, the passive cone body 40 is separated from the drive cone body 30 by the force of the compression spring 18. Therefore, the rotation of the rotating sleeve 10 driven by the worm 13 and the worm wheel 14 is not transmitted to the driven shaft 20.

On the other hand, when a current is applied to the coil 33 by the current adjustment device 34, the driving cone body 30 is magnetized and attracts the passive cone body 40. Then, the passive cone body 40 brings its inner peripheral contact surface 42 into contact with the outer peripheral contact surface 32, and the suction surface 41 maintains a non-contact state with the suction surface 31.

If the current flowing through the coil 33 is the maximum current that attracts the passive cone body 40, the contact pressure acting between the contact surfaces 32 and 42 of the cone bodies 30 and 40 will be the maximum, and both will be After a quick slide, they immediately rotate as one. That is, the rotation of the rotating sleeve 10 is transmitted to the driven shaft 20.

In such usage, it is practical for the current regulator 34 to consist of an on/off switch that turns on and off the maximum current.

On the other hand, the current flowing through the coil 33 is controlled by the current adjusting device 34.
By adjusting the size according to the above, it is possible to adjust the transmission torque transmitted from the drive side cone body 30 to the passive side cone body 40. In other words, if a small current is passed through the coil 33, the force that attracts the attraction surface 41 will be reduced, so that the outer peripheral contact surface 32
Slippage occurs between the contact surface 42 and the inner peripheral contact surface 42. Therefore, coil 3
Depending on the magnitude of the current flowing through the rotating sleeve 10 to the driven shaft 2
The torque transmitted to zero can be adjusted.

Note that when the power to the coil 33 is cut off, the magnetic attraction force disappears, so the passive cone body 40 is separated from the drive cone body 30 by the force of the compression spring 18.

The driving side cone body 30 and the passive side cone body 40 have at least their attraction surfaces 31 and 41 made of a magnetic material so that a magnetic attraction force can be obtained. However, the outer circumferential contact surface 32 and the inner circumferential contact surface 42 can be made of non-magnetic materials since they have no or little influence on the magnetic attraction force.

However, if it is not practical from the viewpoint of manufacturing cost and strength to construct the suction surface 31 and the outer peripheral contact surface 32) from the suction surface 41 and the inner peripheral contact surface 42 from completely different materials,
Various surface treatments can be applied to the surface of the magnetic material, or wear-resistant materials can be attached thereto. As for surface treatment,
In addition to surface treatments that improve wear resistance such as carburizing, carbonitriding, nitrocarburizing, nitriding, poron impregnation, and metal infiltration treatments, low-friction coating treatments, application of solid lubricants, etc. can be performed. Further, as the wear-resistant material to be attached, materials used as brake shoe materials, such as phenol carbon material and asbestos, can be used. In this way, the material of the outer circumferential contact surface 32 and the inner circumferential contact surface 42 can be freely selected depending on the manner of use, such as whether the two are mainly slid or integrated. If a wear-resistant material is attached, it is also possible to replace it when it wears out.

In the above embodiment, the present invention is applied to an electromagnetic clutch device, but if the passive side cone body 40 is fixed, a brake mechanism for stopping the rotation of the rotating sleeve 10 is configured, and the drive side cone body 30 is fixed. If these are fixed, a brake mechanism for stopping the rotation of the driven shaft 20 is constructed. Further, in the above embodiment, the passive cone body 40 moves in the axial direction, but it is obvious that the driving cone body 30 may be configured to move in the axial direction. The position, shape, etc. of the low rotation body are not a concern of the present invention.

"Effects of the Invention" As described above, according to the present invention, in an electromagnetic clutch brake device, the driving body and the passive body that are electromagnetically brought into contact and separated are each provided with a male side cone having a suction surface and a contact surface separately. It is composed of a body and a female cone body, and the suction surface does not come into contact even if the contact surfaces make contact, so even if the contact surface is worn out, the suction force only increases and does not decrease. Furthermore, since there is a degree of freedom in the material of the contact surface, a device with superior friction characteristics can be obtained compared to a conventional flat plate type electromagnetic clutch brake in which the suction surface and the contact surface are the same. Furthermore, since it is possible to use it by controlling the amount of current applied to the coil and causing the contact surface to slide, new functions that cannot be expected with conventional electromagnetic clutch brake devices, such as rotation control on the driven body side and slow brake operation, are possible. Can open up fields of use.

[Brief explanation of drawings]

The figure is an upper half sectional view of the main part showing an embodiment of the electromagnetic clutch brake device of the present invention. DESCRIPTION OF SYMBOLS 10... Rotating sleeve (rotating body), 18... Compression spring, 20... Driven shaft, 30... Drive side (male side) cone body (driver body), 31... Suction surface, 32 ... Contact surface, 33 ... Coil (electromagnetic body), 34 ... Current adjustment device, 40 ... Passive side (female side) cone body (passive body), 4
1... Suction surface, 42... Contact surface.

Claims (6)

[Claims] (1) In an electromagnetic clutch brake in which a passive body is opposed to a driving body that rotates together with the rotating body, and the electromagnetic body disposed inside the driving body or the passive body is energized to attract and integrate the two. , one of the driving body and the passive body is constituted by a male side cone body having a suction surface orthogonal to the axis of the rotating body and a conical outer peripheral contact surface, and the other is constituted by the above male side cone body. a female cone body having a suction surface and an inner circumferential contact surface opposite to the suction surface and outer circumferential contact surface, and when the male cone body and the female cone body are energized to the electromagnetic body, An electromagnetic clutch/brake device characterized in that the contact surfaces are in contact and the suction surface is non-contact. (2) The electromagnetic clutch/brake device according to claim 1, further comprising a current adjustment device for controlling the amount of current flowing to the electromagnetic body. (3) In claim 1 or 2, the electromagnetic clutch brake has a sliding material made of a non-magnetic material attached to the conical contact surface of the male cone body and the female cone body. Device. (4) In any one of claims 1 to 3, one of the male cone body and the female cone body is fixed to a rotating body, and the other is fixed to another rotating body in the rotational direction. An electromagnetic clutch/brake device that is integrally supported to allow axial movement. (5) In any one of claims 1 to 3, one of the male cone body and the female cone body is fixed to a rotating body, and the other is supported movably in the axial direction on a fixed shaft. Electromagnetic clutch brake device. (6) In any one of claims 1 to 3, one of the male cone body and the female cone body is fixed, and the other is supported movably in the axial direction by the rotating body. Electromagnetic clutch brake device.