JPH0138356Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a non-excitation-operated electromagnetic general-purpose brake.

[Conventional technology]

The non-excitation type electromagnetic general-purpose brake brake uses the force of the spring included in the brake body to push the armature toward the end plate when the brake body is not energized, and presses the lining plate between the armature and the end plate to perform braking. Moreover, when energized, the armature is attracted toward the brake body by the magnetic force of the brake body, and the armature is separated from the lining plate to release braking.

In this kind of conventional electromagnetic general-purpose brake, the lining plate is formed into a simple flat plate shape with a fitting hole provided in the center thereof. If the lining plate is integrally fixed to the hub attached to the rotating shaft, the normal braking function will be impaired as the lining attached to the lining plate wears out. The shaft is fitted so as to be movable along the axial direction and rotated together with the rotation shaft.

[Problem that the invention attempts to solve]

When such conventional electromagnetic general-purpose brakes are installed in a position where the rotating shaft is vertical, the lining plate rotates while contacting the armature or end plate due to its own weight, which generates a large friction noise and requires quietness. It was inconvenient if the Not only that, but the lining plate wears out more quickly, and the permissible braking frequency decreases due to frictional heat. Therefore, in the past, there was a problem in that the mounting position had to be restricted so that the rotating shaft that rotates with the lining plate was horizontal. Moreover, even when used in such a horizontal mounting position, the single lining plate cannot be fixed as mentioned above, so the armature, which rotates with the rotating shaft when the brake is released, rotates around the hub. There was a problem that the lining plate came into contact with the armature and the end plate due to the wobbling and such surface deviation, which easily caused scraping noise.

[Means for solving problems]

This invention consists of an armature that is moved by the spring force and excitation force of the brake body, and an end plate that is mounted at a distance in front of the brake body, and is integrated with a hub that is attached to the rotating shaft. The lining plate, which is rotated by The end plate and the core plate of the disk part are each made of a non-magnetic material, and the hub and the mating cylindrical part are each made of a material with low residual magnetism. By doing so, the above-mentioned conventional problems are solved.

[Effect]

By providing the above solution, the end plate and the disk core plate are not magnetized, but
The hub and the fitting cylindrical portion are magnetized and magnetically coupled to each other only when the braking is released by the excitation force and the energization is applied.
Thereby, the lining plate is fixed to the rotating shaft via the hub. When fixing the lining plate to the rotating shaft in this way, the lining plate is separated from the armature and end plate in both cases where the rotating axis is horizontal and when the rotating axis is vertical. made in the state. Therefore, the degree of freedom in mounting position is increased. In addition, by fitting the cylindrical part of the lining plate with the hub attached to the rotating shaft, the lining plate can be stably supported even when the brake is released in the horizontal mounting position. , suppresses surface runout of the lining plate.

〔Example〕

In FIGS. 1 and 2 showing an embodiment of the present invention, reference numeral 1 denotes a brake body constructed as an electromagnet. This main body 1 is formed by attaching an electromagnetic coil 4, a plurality of collars 5, a plurality of screw receivers 6, and a plurality of springs 7 to a yoke 3 having a through hole 2 in the center. The electromagnetic coil 4 is provided surrounding the through hole 2. The plurality of collars 5 and the plurality of screw receivers 6 are arranged at regular intervals on the outer circumferential side of the electromagnetic coil 4, and the plurality of springs 7 are also arranged at fixed intervals on the outer circumferential side of the electromagnetic coil 4. It is arranged.

End plates 8 formed in a disc shape from a non-magnetic material such as stainless steel are attached to the front surface of the brake body 1 at predetermined intervals.
The plate 8 is attached by connecting a spacer cylinder 9 to each of the screw receivers 6 and screwing fixing screws 10 into the screw receivers 6 through the end plates 8 and spacer cylinders 9, respectively.

An armature 11 is movably provided between the brake main body 1 and the end plate 8, and moves toward and away from a lining plate 15, which will be described later. The armature 11 is disc-shaped, and each of the spacer cylinders 9
These cylindrical bodies 9 are moved as a guide.
At the same time, the end plate 8 is always urged toward the end plate 8 by the urging force of each of the springs 7, and is pressed into contact with the lining plate 15.

In the figure, reference numerals 8a and 11a indicate bolt passages provided on the end plate 8 and the armature 11 facing the collar 5, and 12 is a mounting bolt.
The brake body 1 includes a bolt passage portion 8a,
A machine 14 equipped with a rotating shaft 13 via a mounting bolt 12 inserted into the collar 5 through 11a.
It is designed to be installed and fixed.

Then, the end plate 8 and the armature 1
1, a lining plate 15 is provided between the two. This lining plate 15 includes a fitting cylindrical part 16 made of a material with low residual magnetism such as SIOC, and a disc-shaped disk part 1 connected to the outer periphery of the fitting cylindrical part 16.
It is formed from 7. The fitting cylindrical portion 16 is provided at the center of the disk portion 17, is longer than the thickness of the disk portion 17, and has approximately the same length as, for example, the hub 18 attached to the rotating shaft 13. It is fitted around the outer periphery of the hub 18 so as to be movable along the axial direction. The hub 18 is made of a material with low residual magnetism such as SIOC, and the lining plate 1
5 are designed to rotate together. The disk portion 17 is located between the end plate 8 and the armature 11, and is lined with linings 1 on both sides of a core plate 17a made of a non-magnetic material such as hard aluminum and connected to the cylindrical portion 16.
7b, respectively.

Note that g in FIG. 1 is a gap through which the armature 11 is moved.

FIG. 1 shows the non-excitation state when the electromagnetic brake having the above structure is used in an installation position in which the rotating shaft 13 is horizontal. In this state, the armature 11 forms a gap g with the brake body 1 due to the biasing force of the spring 7 and is pressed toward the end plate 8, pressing the lining plate 15 between it and the end plate 8. Rotating axis 1
3 is maintained in a braking state.

When the electromagnetic coil 4 is energized and excited from this braking state, the armature 11 is attracted toward the brake body 1 side against the biasing force of the spring 7 due to the magnetic force, and is separated from the lining plate 15. is separated from this plate 8 due to the contact resistance with the end plate 8, so that the braking of the rotating shaft 13 is released. At this time, the fitting cylindrical portion 16 and the hub 18 are magnetized by magnetic induction, so that they are magnetically coupled. In other words,
A lining plate 15 is fixed to the rotating shaft 13.

In this way, the lining plate 15 is fixed to the rotating shaft 13 in the brake release position, so even if there is vibration in the machine to which the brake is installed, the lining plate 15 is prevented from moving in the thrust direction due to vibration. . Thereby, it is possible to prevent the lining plate 15 from coming into contact with the end plate 8 or the armature 11 and causing friction noise. At the same time, in the state in which the brake is released as described above, the lining plate 15
6 is fitted into the hub 18, the lining plate 15 is supported in a stable state by these fittings, and surface wobbling of the lining plate 15 is suppressed. Therefore, the disk portion 17 of the lining plate 15
is prevented from coming into contact with the end plate 8 or the armature 11 and generating a scraping sound. Due to the above, it is also suitable for use in cases where quietness is required.

Furthermore, although there is some looseness between the fitting cylindrical portion 16 and the hub 18 due to the dimensional difference due to fitting, the above-mentioned magnetic coupling prevents vibrations from the outside. It is also possible to prevent the occurrence of a rattling sound.

Note that in the brake release state described above, the end plate 8 and the core plate 17a of the disk portion 17 are not magnetized, and when the power to the electromagnetic coil 4 is cut off, the coil 4 is demagnetized and the fitting cylindrical portion Since the hub 16 and the hub 18 are immediately demagnetized, the biasing force of the spring 7 creates a braking condition. and,
Despite the repetition of the above operations, residual magnetism in the fitting cylindrical portion 16 and the hub 18 is small, and these do not become magnetized.

When this electromagnetic brake is used with the end plate 8 facing up and the rotating shaft 13 being vertical, the lining plate 1
The lining plate 15 is fixed to the rotating shaft 13 by the above-described magnetic coupling before the lining plate 5 reaches the armature 11 due to its own weight. Thereby, the lining plate 15 can be used while preventing it from coming into contact with the armature 11 and causing scraping noise.

In addition, the electromagnetic brake is attached to its end plate 8.
When used in an installation position in which the rotary shaft 13 is vertical with the lining plate 15 facing down, the lining plate 15 resists its own weight and comes into contact with the end plate 8 at the same time as the braking is released due to the energization of the electromagnetic coil 4. Due to the resistance, it is fixed to the rotating shaft 13 by the previously described magnetic coupling in a state slightly separated from the plate 8. This prevents the lining plate 15 from repeatedly coming into contact with and separating from the end plate 8 due to the relationship between the contact resistance and its own weight, and can be used while preventing the occurrence of friction noise.

Although the above-mentioned embodiment is constructed as described above, in carrying out the present invention, the brake body, the end plate, the fitting cylindrical portion of the lining plate, and the fitting cylindrical portion of the lining plate may be It goes without saying that the specific structure, shape, position, material, etc. of the disk portion, the core plate of the disk portion, the armature, the hub, etc. are not limited to the one embodiment described above, and can be configured and implemented in various ways. It is.

[Effect of idea]

According to the present invention, which has the gist of the structure described in the above-mentioned utility model registration claims, the lining plate can be fixed to the hub of the rotating shaft by magnetic coupling that occurs only when the brake is released, and the fitting cylindrical shape Since the surface runout of the lining plate can be suppressed at this point, it is possible to prevent the amount of abrasion and the generation of abrasion and frictional heat that accompanies it, and also to prevent an adverse effect on the permissible frequency. Therefore, it is suitable not only when used with the rotating shaft horizontal, but also when used vertically or diagonally, and has the practical effect of having a large degree of freedom in mounting orientation.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG.
In the drawing, FIG. 2 is a longitudinal sectional side view taken along line A-A in a non-excited state, and a front view. 1... Brake body, 8... End plate,
11... Armature, 13... Rotating shaft, 15...
Lining plate, 16... Fitting cylindrical part, 17... Disc part, 17a... Disk core plate, 18... Hub.

Claims (1)

[Scope of utility model registration request] An armature that is moved by spring force and excitation force is disposed between the brake body and an end plate that is attached to the front of the body at a distance, and is rotated together with a hub that is attached to the rotating shaft. In a non-excitation type electromagnetic general-purpose brake in which a lining plate is disposed between the armature and the end plate, the lining plate is
A disk portion located between the armature and the end plate, which is continuous with the center portion of the disk portion, is fitted to the outer periphery of the hub so as to be movable along the axial direction, and is longer than the thickness of the disk portion. and a mating cylindrical part, and the end plate and the core plate of the disk part are each made of a non-magnetized material, and the hub and the mating cylindrical part are each made of a material with low residual magnetism. An electromagnetic general-purpose brake featuring: