JP2002181089A - Non-exciting operating brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-exciting operating brake to be easily mounted on a machine to be braked. SOLUTION: After a gap between an armature 9 and a field core 3 is adjusted, a set collar 13 is fitted into an end part of a boss part 12b of a brake hub 12 and is fixed with a temporarily fixing screw 14. After the brake hub 12 is fixed to a rotary shaft of a motor, the set collar 13 is removed from the boss part 12b of the brake hub 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a brake hub, which frictionally engages an armature with a flange portion.
The present invention relates to a non-excitation operation brake that brakes a rotating shaft on which a brake hub is mounted.

[0002]

2. Description of the Related Art A non-excited operation brake described in Japanese Utility Model Publication No. 56-63265 discloses a state in which an armature is magnetically attracted to a field core by magnetic attraction of an electromagnetic coil.
After adjusting the gap between the armature and the brake hub, the gap between the armature and the field core can be adjusted by fixing the brake hub to the rotating shaft of the motor with a mounting screw.

The non-excited operation brake described in Japanese Utility Model Laid-Open Publication No. 57-122836 is provided with a stopper for limiting the retraction of the brake hub, and is interposed between the stopper and the end surface of the rotating shaft. The clearance between the armature and the field core can be adjusted by screwing the stopper and the mounting screw passing through the disk spring into the screw hole of the rotating shaft against the spring force of the disk spring.

In the non-excitation operating brake described in Japanese Patent Application Laid-Open No. 9-147878, after a brake hub is mounted on a rotating shaft of a motor, the brake is screwed to an adjusting bolt against the spring force of a braking spring. The clearance between the armature and the field core can be adjusted by screwing forward the locking nut toward the armature.

[0005]

A conventional non-excited operation brake is configured to adjust a gap between an armature and a field core while being mounted on a machine to be braked such as a motor. It was troublesome. An object of the present invention is to provide a non-excited operation brake that can be easily mounted on a machine to be braked.

[0006]

A non-excited operation brake according to the present invention comprises: a field core accommodating an electromagnetic coil;
An armature movably supported on the field core only in the axial direction, a brake spring interposed between the field core and the armature, and a flange with which the armature frictionally engages by a spring force of the brake spring And a flange having a flange portion formed at one end, a boss portion penetrating the center of the field core and the armature, and a mounting screw hole formed at the other end of the boss portion protruding from the field core. A hub, an insertion portion of a mounting screw, which is detachably fitted to the other end of the boss portion of the brake hub, a side surface of which contacts the field core and is screwed into the mounting screw hole, and a screw hole of a temporary fixing screw. It is characterized in that the formed set collar is provided.

In the non-excited operation brake having such a configuration, the field core is fixed to the frame of the machine to be braked while inserting the rotating shaft into the shaft hole of the brake hub, and then formed on the other end of the boss portion of the brake hub. By screwing the mounting screw through the mounting screw hole and tightening the tip of the mounting screw to the rotating shaft, the brake hub is mounted so as to be integrally rotatable with the rotating shaft. Further, by removing the set collar from the boss portion of the brake hub, the mounting of the brake on the machine to be braked is completed.

[0008]

FIG. 1 shows an embodiment of the present invention.
The non-excitation operation brake shown in FIGS. FIG.
FIG. 2 is a sectional view of the non-excitation operation brake, and FIG. 2 is a sectional view of only the lower half at a position shifted in the circumferential direction. 3A and 3B show a set collar, wherein FIG. 3A is a sectional view, FIG. 3B is a right side view of FIG. 3A, and FIG. 3C is a plan view. FIG. 4 is a cross-sectional view of the non-excitation operating brake mounted on the motor.

The non-excited operation brake 1 is provided with a field core 3 fixed to a frame 2a of a motor 2 shown as a machine to be braked. Field core 3
The electromagnetic coil 4 is accommodated in an annular groove opened on the frame 2a side of the motor 2. The field core 3 has a bottomed screw hole 3a into which a guide screw 6 penetrating the guide collar 5 is screwed, a bottomed spring hole 3b into which a braking spring 7 is inserted, and a mounting screw 8 Through hole 3c
Are formed. The screw hole 3a, the spring hole 3b, and the through hole 3c are formed at positions where the outer cylindrical portion of the field core 3 is equally divided in the circumferential direction.

An armature 9 faces the magnetic pole surface of the field core 3 with a predetermined gap (air gap of about 0.1 mm to 0.2 mm). Armature 9 has
A notch groove 9a into which the guide collar 5 is fitted, and another notch groove 9b into which a mounting collar 10 interposed between the field core 3 and the frame 2a are formed. The notch groove 9a and the other notch groove 9b are formed at positions that divide the outer peripheral surface of the armature 9 into three equal parts in the circumferential direction. Further, the side surface of the armature 9 opposite to the field core 3 is formed to be lower than the portion where the notch grooves 9a and 9b are formed, and the annular friction plate 11 is fixed to the lower side surface. I have. Further, the above-described braking spring 7 is interposed between the armature 9 and the spring hole 3b of the field core 3, and the armature 9
Is pressed toward the motor 2 by the spring force of the braking spring 7.

The friction plate 11 is pressed against the flange 12 a of the brake hub 12 by the brake spring 7. The brake hub 12 is provided with a cylindrical boss portion 12 b penetrating through the center of the armature 9 and the field core 3.
The above-mentioned disc-shaped flange portion 12a is integrally formed at one end of 2b. The boss portion 12b of the brake hub 12 has a length at the other end protruding toward the armature 9 side of the field core 3, and two mounting screw holes 12c penetrating in the radial direction at the other end. ing. Further, a key groove 12d is formed on the inner peripheral surface of the boss portion 12b of the brake hub 12 so as to penetrate in the axial direction into which the key 2c inserted into the groove of the rotating shaft 2b is fitted.

Before the brake hub 12 having such a shape is mounted on the motor 2 as shown in FIG. 1, a set collar 13 is fitted to the other end of the boss portion 12b, and the set collar 13 is connected to the brake hub. It is supported on the field core 3 by being fixed to the temporary core 12 with a temporary fixing screw 14. The set collar 13 is provided with two screw holes 13a into which the temporary fixing screws 14 are screwed, and as insertion portions into which the mounting screws 15 shown in FIG. 4 are inserted, and is opened in the radial direction and the field core 3 side. Two notch grooves 13b and an annular protrusion 13c formed at the opening edge of the through hole and protruding from the side surface are formed. Note that the mounting screw 15 is
When all are screwed into the mounting screw holes 12c, the above-described insertion portion may be a through hole.

The set collar 13 fitted to the boss 12b of the brake hub 12 has a friction plate fixed to the armature 9 in a state where the armature 9 is magnetically attracted to the field core 3 by the magnetic attraction of the electromagnetic coil 4. After the gap between the flange 11 and the flange portion 12a of the brake hub 12 is adjusted, the gap is applied to the side surface of the field core 3 on the side opposite to the armature 9, and the protrusion 13c is formed at the opening edge of the through hole of the field core 3. Is fitted into the annular recess 3d. Further, in this state, the set collar 13
Is the boss 12 of the brake hub 12
fixed to b.

The non-excited operation brake 1 assembled as described above is connected to a boss 12 of a brake hub 12 as shown in FIG.
The key b is fitted to the rotating shaft 2b, and the field core 3 is fixed to the frame 2a of the motor 2 by the mounting screw 8 via the mounting collar 10. After the field core 3 is mounted on the motor 2, the brake hub 12 is fixed to the rotating shaft 2b by the mounting screw 15. Further, the set collar 13 is removed from the brake hub 12.

Non-excited operation brake 1 having such a configuration
Is a non-excited state in which power supply to the electromagnetic coil 4 is cut off when the motor 2 is stopped, and the armature 9 is moved by the spring force of the braking spring 7 to the flange portion 1 of the brake hub 12.
2a to hold the rotating shaft 2b stationary.
When the electromagnetic coil 4 is energized to be in an excited state, the armature 9 is magnetically attracted to the field core 3 against the spring force of the braking spring 7, so that the rotating shaft 2b becomes rotatable.

[0016]

According to the non-excited operation brake of the present invention, a flange portion with which the armature is frictionally engaged by the spring force of the braking spring, and a boss portion having this flange portion formed at one end and penetrating through the field core and the center of the armature. A brake hub having a mounting screw hole formed at the other end of the boss protruding from the field core; and a brake hub removably fitted to the other end of the boss of the brake hub so that a side surface abuts on the field core. Provided with a set collar in which a screw hole for a mounting screw and a screw hole for a temporary fixing screw to be screwed into the mounting screw hole are provided, and a gap between the armature and the field core is adjusted in advance. Since it is mounted on the machine to be braked, it can be easily mounted on the machine to be braked.

[Brief description of the drawings]

FIG. 1 is a sectional view of a non-excited operation brake shown as an embodiment of the present invention.

FIG. 2 is a sectional view of only a lower half at a position shifted in a circumferential direction.

FIG. 3 is a set collar, (a) is a sectional view, (b)
3A is a right side view of FIG. 3A and FIG. 3C is a plan view.

FIG. 4 is a sectional view of a non-excitation operation brake mounted on the motor.

[Explanation of symbols]

 3 Field core 7 Brake spring 9 Armature 12 Brake hub 13 Set collar

Claims (1)

[Claims] A field core accommodating an electromagnetic coil, an armature movably supported by the field core only in an axial direction, a braking spring interposed between the field core and the armature, A flange portion with which the armature frictionally engages by a spring force of the braking spring, and a boss portion formed at one end of the flange portion and penetrating through the center of the field core and the armature are provided and protruded from the field core. A brake hub having a mounting screw hole formed at the other end of the boss portion; a brake hub removably fitted to the other end of the boss portion of the brake hub; Characterized in that a set collar having a set screw insertion portion and a temporary screw hole formed therein is provided. Dynamic brake.