JPH1193989A - Non-excitation operating electromagnetic brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-excitation operating electromagnetic brake wherein the brake can be easily suited for a faucet part in a connection flange of an accessory equipment of a machine frame, motor, etc., having various faucet diameters, without changing specification of a motor mounting machine frame side and connection flange, new assembly and replacement can be performed. SOLUTION: A field 4 of an electromagnetic brake 1 is constituted by a field main unit 4C and a mounting flange 4A fixed able to separate to the field main unit 4C, one faucet part 4D formed in the mounting flange 4A and the other faucet part 4E are respectively fitted to a faucet part 3B formed in the periphery of an opening part of a machine frame 3 and a faucet part 2B formed in a connection flange 2A of an accessory equipment 2, the machine frame 3 and the accessory frame 2 are connected through the mounting flange 4A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-energized electromagnetic brake which is opened when an electromagnetic coil is energized and brakes a rotary shaft when the energization is interrupted. The present invention relates to a non-excited operation type electromagnetic brake having a suitable structure for mounting together with the electromagnetic brake.

[0002]

2. Description of the Related Art Conventionally, a non-excitation type electromagnetic brake of this type is, as shown in FIG. 2, for example, provided between an connecting flange A2 at a front end of a motor A1 and a mounting surface A4 of a machine frame A3. The mounting flange A7 integrally formed around the field A6 of A5 is sandwiched, and a plurality of mounting bolts A
8 is used by being fastened and fixed to the machine casing A3 together with the motor A1.

[0003] A motor shaft A9 projecting forward of the motor A1 is connected to a driven shaft A10 provided in the machine frame A3 by a shaft coupling A11.
The brake bub A14 holding the friction plate A13 is externally fitted to the drive-side coupling hub A12, and is fixed with a set screw A15.

[0004] The friction plate A13 is provided with a brake hub A14.
Plate A16, which rotates integrally with the plate A16 and is held so as to be displaceable in the axial direction, and is fixed to the field A6.
And the armature A17.

The armature A17 has a field A
6, the rotation of the plate A1 is held by a spring (not shown).
It is urged to the 6 side.

In the above configuration, when the electromagnetic coil A18 incorporated in the field A6 is not energized, the friction plate A13 is moved by the force of the spring to the plate A16.
The motor shaft A9, which is interposed between the friction plate A13 and the armature A17 and is braked, is prevented from rotating by the motor shaft A9 connected to the friction plate A13 via the brake hub A14 and the drive-side coupling hub A12.

When the electromagnetic coil A18 is energized immediately before the start of the motor A1, the armature A17 is attracted to the field A6 against the urging force of the spring by the magnetic force generated in the electromagnetic coil A18, and the friction plate A13 is moved. As a result, the braking of the motor shaft A9 is released.

[0008]

The conventional electromagnetic brake A5 as shown in FIG. 2 has a mounting flange A7.
The spigot part A19 formed on one side of the
3 is fitted to the spigot portion A20 formed on the inner peripheral surface of the opening of the mounting surface A4, and the spigot portion A21 formed on the other surface is connected to the spigot portion A22 formed on the connection flange A2. By fitting, the motor A1 and the electromagnetic brake A5 are positioned with respect to the machine frame A3.

For this reason, when the motor conventionally connected to the electromagnetic brake is replaced with a product of another company, or when the electromagnetic brake is later installed in an existing device in which the motor is directly mounted on the machine frame, If the diameter of these spigot parts formed on the mounting flange is different from the diameter of the spigot part on the connection flange side or the machine frame side, it cannot be incorporated as it is, and the customer side specifications on the machine frame side or the connection flange side Had to be changed.

In a conventional electromagnetic brake of this type,
If magnetic soft iron with excellent magnetic properties is used in the field,
Since the mounting flange is cut out by machining, there is a problem that machining cost and material cost increase.

However, if it is made of cast iron in order to reduce the processing cost and material cost of the field, there is a problem that the magnetic characteristics are deteriorated and the attractive force of the armature is reduced, and electromagnetic brakes having different brake torques are manufactured. In this case, it was necessary to newly produce the entire mold of the field.

Further, since the machine frame to which the electromagnetic brake is mounted is generally made of cast iron, there is a problem that magnetic flux passing through the field leaks from the mounting flange to the machine frame side, and the magnetic flux effectively acting on the armature is reduced.

Therefore, the present invention solves the above-mentioned problems of the prior art, and can be easily adapted to a spigot portion of a connecting flange of an accessory such as a machine frame or a motor having various spigot diameters. It is an object of the present invention to provide a non-excitation operation type electromagnetic brake that can be newly incorporated or replaced without changing the specifications of a machine frame side on which a motor is mounted or a specification of a connection flange.

[0014]

In order to achieve the above object, a non-excited operation type electromagnetic brake according to the present invention is characterized in that one of the spigot portions formed on both sides of a mounting flange provided in a field having an electromagnetic coil has a machine frame. And the other is fitted to a spigot part of a connecting flange provided around the rotary shaft of the accessory with the first rotary shaft protruding from the front surface. And the first rotating shaft is connected to a second rotating shaft provided in the machine casing through the center of the field, and the first rotating shaft is connected to the first rotating shaft when the power supply to the electromagnetic coil is interrupted. In a non-excited operation type electromagnetic brake configured to brake a rotating shaft, the field may be a field main body in which an electromagnetic coil is incorporated, and a mounting flange detachably fixed to the field main body. Are those that you configured.

[0015] The mounting flange may be formed so that the diameter of the spigot part fitted to the spigot part of the machine frame and the diameter of the spigot part to be fitted to the spigot part of the connection flange of the accessory equipment are substantially the same. preferable. Further, the mounting flange is
It is also preferable to be formed of a non-magnetic material.

In the present specification, the term "attached equipment" means a motor, a speed reducer, a bearing box and the like used by being attached to the machine frame, and is attached to the machine frame together with the electromagnetic brake by a connecting flange.

[0017]

The non-excited operation type electromagnetic brake of the present invention is manufactured such that only the mounting flange is adapted to the spigot formed in the opening of the mounting surface of the machine frame or the spigot formed in the connecting flange of the accessory device. By doing so, it is possible to newly install or replace the electromagnetic brake without changing the specifications of the machine frame side and attached equipment, and to install the same specification mounting flange,
It is possible to use a combination of field bodies having different brake torques.

In particular, when the mounting flange is made of a non-magnetic material, magnetic flux is prevented from leaking from the field main body to the machine frame through the mounting flange, and the efficiency of the electromagnetic coil is increased.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of a non-excitation operation type electromagnetic brake of the present invention. A non-excitation operation type electromagnetic brake (hereinafter, simply referred to as an electromagnetic brake) 1 of the present invention is a motor as an attached device. 2 and a machine frame 3 to which the motor 2 is fixed.
Is interposed between a mounting surface 3A of the machine frame 3 and a connection flange 2A provided at a front end of the motor 2, and is fixed to the machine frame 3 together with the motor 2 by a plurality of mounting bolts 5.

In the center of the field 4, a through hole 4B through which a motor shaft 6 as a first rotating shaft passes is formed.
An electromagnetic coil 7 is incorporated in the field 4. An annular plate 8 is fixed to the end face of the field 4 on the side opposite to the connection flange 2A side by a plurality of mounting bolts 9 arranged in the circumferential direction,
The gap between the field 4 and the plate 8 is held at a predetermined gap S by a collar 10 which is externally fitted to the mounting bolt 9.

In the gap S, an armature 11 and a friction plate 12 are arranged. The armature 11 is formed in a disk shape from a magnetic material, has a through hole 11A at the center thereof through which the motor shaft 6 penetrates, and has a guide hole 11B provided at an outer peripheral portion thereof in a collar 10 of the mounting bolt 9. Are slidably inserted and supported so as to be movable in parallel with the axis of the motor shaft 6.

Further, the armature 11 is urged toward the plate 8 by an urging member such as a compression coil spring (not shown), and only when the electromagnetic coil 7 is energized to excite the field 4, It is attracted and moved toward the field 4 against the urging member.

Further, the friction plate 12 is formed in an annular shape and has friction surfaces on both sides, and the inner peripheral surface is supported by a brake bubble 13 frictionally fixed to the motor shaft 6.

The brake bub 13 includes a flange-shaped friction plate holding portion 13A and an elastically deformable cylindrical portion 13B fitted to the tip of the motor shaft 6, and has an outer periphery of the friction plate holding portion 13A. The surface holds the inner peripheral surface of the friction plate 12. The outer peripheral surface of the friction plate holding portion 13A and the inner peripheral surface of the friction plate 12 are formed in a shape that mesh with each other to regulate the relative rotation of the friction plate 12 with respect to the brake bub 13 and allow the friction plate 12 to be displaced in the axial direction. ing.

A drive-side coupling hub 14 is fitted on the outer peripheral surface of the cylindrical portion 13B. The drive-side coupling hub 14 includes a flange portion 14A and a boss-shaped fastening portion 14B that is continuous with one side in the axial direction of the flange portion 14A. The fastening portion 14B has one radial slit G formed between the outer peripheral surface and the inner peripheral surface.

One side and the other side of the fastening portion 14B separated from each other by the slit G are connected by a fastening screw 15 crossing the slit G. That is, a through hole for the fastening screw 15 is formed on one side of the fastening portion 14B with the slit G interposed therebetween, and a screw hole into which the fastening screw 15 is screwed is formed on the other side. When tightened, the fastening portion 14B is elastically deformed so that the gap between the slits G is narrowed, and the inner peripheral surface thereof tightens the cylindrical portion 13B of the brake bubble 13. The cylindrical portion 13B is elastically deformed by the tightening force to tighten the motor shaft 6,
The drive-side coupling hub 14 is fixed to the motor shaft 6 together with the brake bub 13.

In this embodiment, the fastening screws 15
When tightening, to facilitate elastic deformation of the fastening portion 14B, and to prevent distortion of the flange portion 14A,
The flange portion 14A and the fastening portion 14B are partially separated by a slit G 'perpendicular to the slit G.

On the other hand, a driven shaft 16 as a second rotating shaft is disposed substantially coaxially with the motor shaft 6 inside the machine frame 3, and the driven side coupling hub 1 is provided at the front end of the driven shaft 16.
7 are fitted. The driven coupling hub 17
Are the fastening portions 14 of the drive-side coupling hub 14 described above.
It has a fastening portion 17B similar to B, and is fixed to the driven shaft 16 by tightening a fastening screw 18.

The driving side coupling hub 14 and the driven side coupling hub 17 are opposed to each other by a flange portion 14A.
And the flange portion 17A are indirectly connected to each other via thin annular leaf springs 20 alternately connected by fastening members 19 arranged at a plurality of positions in the circumferential direction. The power is transmitted to the driven shaft 13. At this time, an error between the axis of the motor shaft 6 and the axis of the driven shaft 13 is absorbed by the bending deformation of the leaf spring 20.

When the motor 2 is not energized, the electromagnetic coil 1 built in the field 4 is not energized when the motor 2 is not energized, and the armature 11 is driven by the urging force of the urging member. 12 is pressed against the armature 11 and the plate 8
And is braked by mutual frictional force,
The rotation of the motor shaft 6 connected to the friction plate 12 via the brake bub 13 is prevented.

When the electromagnetic coil 7 is energized immediately before the power supply to the motor 2 is turned on, the field 4 is excited to attract and move the armature 11 against the urging force of the urging member. 8 is released, the motor shaft 6 starts rotating, and the rotation is transmitted from the drive-side coupling hub 14 to the driven shaft 16 via the driven-side coupling hub 17. Is done.

On the other hand, the field 4 is made of an annular mounting flange 4A made of an aluminum material and a magnetic soft iron material, and has a built-in electromagnetic coil 7 and a through hole 4B for a motor shaft 6 formed in the center. And a short cylindrical field main body 4C.

The inner peripheral surface of the mounting flange 4A is fitted to the outer peripheral surface of the field main body 4C, and is detachably fixed to the field main body 4C through bolts 21 in the radial direction from the outer peripheral surface side.

A spigot portion 4D that fits into a spigot portion 3B formed by the inner peripheral edge of the opening that opens to the mounting surface 3A is formed on the surface of the mounting flange 4A on the machine frame 3 side. Is formed with a spigot portion 4E that fits into the spigot portion 2B formed on the front surface of the connection flange 2A.

In this embodiment, in particular, the mounting flange 4
Since A is made of an aluminum material which is a non-magnetic material, the magnetic flux of the field main body 4C can be prevented from leaking to the machine frame 3 through the mounting flange 4A, and as a result, generated by the electromagnetic coil 7 Armature 11
And the efficiency of the electromagnetic coil 7 can be increased.

In this embodiment, the spigot portions 2B and 4D are formed as convex spigot portions, and the spigot portions 3B and 4E are formed as concave spigot portions. The relationship may be reversed, in which case a convex spigot portion is formed on the mounting surface 3A of the machine frame instead of the concave spigot portion 3B of the present embodiment in which the inner peripheral edge of the opening is used. do it.

Further, the mounting flange may be made of cast iron in order to reduce the processing cost and material cost, and only the surface of the mounting flange on both sides which comes into contact with another member such as a spigot portion or a bolt hole may be finished by machining. Alternatively, it may be manufactured by machining a steel material from the beginning.

Further, the electromagnetic brake 1 of the above-described embodiment
The magnetic force generated by the electromagnetic coil 7 in the field main body 4C is a structure in which the armature 11 is attracted to the field main body 4C side to release the friction plate 12 and release the braking. The electromagnetic brake of the type in which the armature rotating together with the motor shaft is arranged opposite to the friction plate fixed to the end face of the field main body on the side opposite to the motor side is also similar to that of the above-described embodiment. It can be installed between the machine frame and the motor using a mounting flange detachably fixed to the field main body.

That is, in the electromagnetic brake having the above structure, the armature is held by the brake hub so that the armature rotates integrally with the motor shaft and can freely move toward and away from the friction plate, and is separated from the friction plate by a spring. When the electromagnetic coil is not energized, the armature is attracted to the friction plate against the spring force by the magnetic force of the permanent magnet, its rotation is restricted, the motor shaft is braked, and the armature is When energized, the magnetic force of the permanent magnet is canceled by the magnetic force generated by the electromagnetic coil, the armature separates from the friction plate by the spring force, and the braking of the motor shaft is released. Same as brake.

Further, in the above-described embodiment, the accessory is a motor, and the motor shaft is connected to the driven shaft in the machine frame. However, the mounting flange of the electromagnetic brake is sandwiched between the machine frame. As the accessory connected in the above, may be a reduction gear or a bearing box having a connection flange that is fitted and connected to one of the spigot parts of the mounting flange, and, contrary to the present embodiment, the accessory is The first rotating shaft may be a driven shaft, and the second rotating shaft disposed in the machine frame may be a drive shaft.

[0041]

As described above, according to the non-excited operation type electromagnetic brake of the present invention, the field is constituted by the field main body in which the electromagnetic coil is incorporated and the mounting flange separably fixed to the field main body. Only the mounting flange specifications, so that it can be adapted to various sizes of spigot parts formed on the mounting surface of the machine frame and the connecting flanges of attached equipment such as motors and reduction gears. It is not necessary for the customer to change the specifications of the connection flange of the machine frame and attached equipment according to the mounting flange of the electromagnetic brake.

Since only the specifications of the field main body can be changed without changing the specifications of the spigot portion of the mounting flange, the brake torque in the existing device can be easily changed.

Also, since the field is divided into the field main body and the mounting flange, for example, a material having excellent magnetic properties is used for the field main body, and the mounting flange is inexpensive and excellent in workability and mechanical strength. Material can be selected.

In particular, the diameter of the spigot part of the mounting flange fitted to the spigot part on the machine frame side and the diameter of the spigot part to be fitted to the spigot part of the connecting flange of the accessory are formed to be substantially the same. In this case, the connecting flange of the accessory such as a motor is directly attached to the mounting surface of the machine frame by inlay connection, and the electromagnetic brake can be newly installed without any processing on the existing equipment used. .

Further, when the mounting flange is formed of a non-magnetic material, magnetic flux is prevented from leaking from the field main body to the machine frame through the mounting flange, and the efficiency of the electromagnetic coil can be increased.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a non-excitation operation type electromagnetic brake according to the present invention.

FIG. 2 is a cross-sectional view showing an example of a conventional non-excitation operation type electromagnetic brake.

[Explanation of symbols]

1 Electromagnetic brake 2
Motor (accessory) 2A Connecting flange 2B
Inlay section 3 Machine frame 3A
Mounting surface 3B Inlay part 4
Field 4A Mounting flange 4B
Through hole 4C Field body 4D, 4E
Inlay part 5 Mounting bolt 6 Motor shaft (first rotating shaft) 7
Electromagnetic coil 8 Plate 9
Mounting bolt 10 Collar 11
Armature 12 Friction plate 13
Brake hub 13A Friction plate holder 13B
Tube part 14 Drive side coupling hub 14A
Flange part 14B Fastening part 15
Fastening screw 16 Follower shaft (second rotary shaft) 17 Follower coupling hub 17A
Flange 17B Fastening 19
Fastening member 20 Leaf spring G, G '
Slit S gap

Claims (3)

[Claims] 1. A spigot portion formed on both sides of a mounting flange provided in a field having an electromagnetic coil, one of the spigot portions is fitted to a spigot portion around an opening of a machine frame, and the other is a first spigot from a front surface. Attached to the machine frame together with the accessory device is fitted into the spigot portion of the connection flange provided around the rotation axis of the accessory device with the rotating shaft protruding,
The first rotating shaft is connected to a second rotating shaft provided in the machine frame through the center of the field, so as to brake the first rotating shaft when power supply to the electromagnetic coil is cut off. The non-excited operation type electromagnetic brake, wherein the field comprises a field main body in which an electromagnetic coil is incorporated, and a mounting flange separably fixed to the field main body. brake. 2. The mounting flange is formed such that the diameter of the spigot portion fitted to the spigot portion of the machine frame and the diameter of the spigot portion fitted to the spigot portion of the connecting flange of the accessory device are substantially the same. A non-excited operation type electromagnetic brake, characterized in that: 3. The non-excitation operation type electromagnetic brake according to claim 1, wherein the mounting flange is formed of a non-magnetic material.