JPH0141852B2 - - Google Patents

Abstract

PURPOSE:To prevent a rotation touch of a lining plate during electricity is turned on by mounting an end plate on a brake body movable in an axial direction with a space left, and energizing a lining plate arranged at the space to a brake mounted body side constantly by a spring. CONSTITUTION:A brake body 1 is mounted on a guide pin 11 of a brake mounted body 9 in freely sliding in the axial direction of a rotation axis 12, and an electromagnetic coil 4 is provided. An end plate 18 is axis-supported to the brake body 1 via a barrel body 19. A lining plate 21 fixed to a movable barrel body 24 and an armature 22 engaged with the barrel body 19 and cut off to the electro-magnetic coil are provided between the body 1 and the end plate 18, and the lining plate is energized to a mounted body 9 side constantly by a spring 32. Therefore, during electricity is turned on, gaps g4 and g5 are kept constantly between the lining plate and the armature 22 or the end plate, and a rotation touch can be prevented regardless of a mounted position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a non-excitation-operated electromagnetic general-purpose brake.

[Conventional technology]

Generally speaking, non-excitation operated electromagnetic general-purpose brakes include a single-plate type in which an armature is directly pressed against a lining plate, and a double-plate type in which a lining plate is pressed between an armature and an end plate.

By the way, to explain the above-mentioned single-plate electromagnetic brake, when the power is not energized, the armature is pressed and moved toward the lining plate by the force of the spring provided in the brake body, and the armature is pressed against the lining plate to perform braking. The magnetic force of the main body attracts the armature toward the brake main body, and the armature is separated from the lining plate to release the brake. The lining plate is integrally fixed to the rotating shaft.

In addition, a multi-plate electromagnetic brake uses the force of a spring to press and move the armature toward the end plate when not energized, and presses a lining plate between the armature and the end plate to perform braking, and when energized, magnetic force is applied. to attract the armature to the brake body side,
The armature is configured to be released from the lining plate to release the brake. The above-mentioned 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 seeks to solve]

However, when the above-mentioned single-plate electromagnetic brake is used in a general-purpose motor, for example, the rotating shaft may thermally expand due to heat generation in the motor, and when the rotating shaft expands in the axial direction, the The fixed lining plate is displaced in a direction away from the armature, and the pressure contact between the armature and the lining plate becomes insufficient when power is not applied, resulting in a decrease in braking reliability. For this reason, it is inappropriate to apply this method to devices whose rotating shafts move in the axial direction (such as general-purpose motors).

In addition, when a multi-plate electromagnetic brake is installed in a position with its rotating shaft 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 quiet operation. It was inconvenient in some cases. Furthermore, since the single lining plate could not be fixed, there was a problem in that rattling noise was generated due to play in the fitting between the lining plate and the hub. Not only that, but the lining plate wears out more quickly, and the permissible braking frequency decreases due to frictional heat. For this reason, 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.

The present invention prevents rotational contact between the lining plate and the armature or end plate when energized, has no restrictions on mounting orientation, and is suitable for general-purpose motors in which the rotating shaft moves or expands in the axial direction. The aim is to provide an electromagnetic general-purpose brake.

[Means for solving problems]

The present invention includes a brake body that is movably attached to a guide portion of a brake mounting body along the axial direction of a rotating shaft, and an end plate provided at a distance in front of the brake body that is connected to the brake body through a bearing. A cylindrical body is attached to the rotating shaft, the main body is connected to the end plate, and a lining plate is fixed to the outer periphery of the cylindrical body, which is movable along the axial direction of the rotating shaft. The present invention is characterized in that a spring is provided that is always biased toward the brake mounting body side, and a stopper is provided on the brake mounting body side of the hub that comes into contact with the end of the cylindrical body to form a stop.

[Effect]

According to the configuration of the present invention, the brake body is movable in the axial direction of the rotating shaft along the guide provided on the brake mounting body, and is fixed to the hub fixed to the rotating shaft via the end plate. Therefore, even if the rotating shaft moves in the axial direction, the brake main body is allowed to move following the movement, so the positional relationship between the main body and the end plate does not change. Furthermore, when the braking is released by the excitation force and electricity is applied, the cylinder body and the lining plate are forcibly moved toward the armature by the bias of the spring. Due to this movement, the cylindrical body to which the lining plate is fixed comes into contact with a stopper provided on the hub, so that a gap is secured between the armature and the end plate. This arrangement of the lining plate can be done not only when the rotation axis is horizontal, but also when the rotation axis is perpendicular.

〔Example〕

The present invention will be explained below based on an embodiment shown in the drawings.

In FIGS. 1, 2, and 4, reference numeral 1 indicates a brake body configured as an electromagnet. The main body 1 includes an electromagnetic coil 4 formed in a yoke 3 having a through hole 2 in its center and surrounding the through hole 2. The yoke 3 is provided with a plurality of pin holes 5 as sliding parts, a plurality of screw receivers 6, and a plurality of spring housing holes 7 shown in FIG. They are formed at regular intervals. A spring 8 is housed in each of the spring housing holes 7.

Pin mounting holes 10 are provided at a plurality of locations in the circumferential direction of the brake mounting body 9 so as to face the pin through holes 5 . Guide pins 11 having a diameter slightly smaller than the diameter of the pin through hole 5 are installed in each of the mounting holes 10, and the pin through hole 5 is slidably fitted into these pins 11. . Therefore, the brake body 1 freely slides in the axial direction with respect to the brake mounting body 9 using these pins 11 as guides, and is prevented from rotating by these pins 11. In addition, g in Figures 1 and 2
1 and g2 indicate the gap between the brake mounting body 9 and the moving brake body 1. Further, this mounting body 9 can be mounted on, for example, a general-purpose motor 1 equipped with a rotating shaft 12.
It is attached to the rear of the motor casing of No. 3.
The mounting body 9 is mounted by threading and tightening the mounting bolts 17 into the threading holes 16 of the motor 13 through the bolt holes 14 and the cylindrical spacer 15 provided on the outer circumferential side of the pin mounting hole 10. being done.

A disc-shaped end plate 18 is connected to the front surface of the brake body 1 at a predetermined interval. The plate 18 is attached by connecting a spacer cylinder 19 to each of the screw receivers 6, and screwing fixing screws 20 into the screw receivers 6 through the end plates 18 and spacer cylinders 19, respectively.

An armature 22 is movably provided between the brake main body 1 and the end plate 18 and moves toward and away from a lining plate 21, which will be described later. The armature 22 is disc-shaped and is fitted into the spacer cylinders 19 so as to be moved using the spacer cylinders 19 as a guide.
The end plate 18 is always urged toward the end plate 18 by the urging force of the end plate 18, and is brought into pressure contact with the lining plate 21. Note that g3 in FIG. 2 is a gap through which the armature 22 is moved.

The lining plate 21 provided between the end plate 18 and the armature 22 has a disc shape and is formed by attaching linings 23 to both sides of the lining plate 21, and its center portion is attached to the outer periphery of the cylinder body 24. Fixed. The cylindrical body 24 is longer than the thickness of the lining plate 21, and is fitted onto the outer periphery of a hub 25 attached to the rotating shaft 12 via a key 26 so as to be movable along the axial direction. The lining plate 21 and the cylindrical body 24 are configured to be rotated together with the rotating shaft 12 via a hub 25. Note that the hub 25 is fixed to the rotating shaft 12, and a pulley 27, for example, is attached to the tip thereof.

Further, a bearing 28 is provided between the center portion of the end plate 18 and the outer periphery of the hub 25. The brake body 1 to which the end plate 18 is attached is fixed via the bearing 28 to the rotating shaft 12 to which the hub 25 is attached. Of course, the rotating shaft 12 and the hub 25 freely rotate around the center of the end plate 18 via the bearing 28. In addition, in Figures 1 and 2, 2
9 is a stop ring, and 30 is a collar, and these stop ring 29, collar 30, and bearing 28 are held by tightening a fixing nut 31.

Furthermore, a spring 32 having a wave shape, for example, is provided on the outer periphery of the hub 25 and is located between the end surface of the cylindrical body 24 on the end plate 18 side and the collar 30 facing thereto. The spring 32 always urges the cylinder 24 and the lining plate 21 toward the armature 22, so that the cylinder 24 and the lining plate 21 are forcibly moved toward the armature 22.

Further, a stopper 33 is provided on the outer periphery of the hub 25 on the brake mounting body 9 side. The other end of the cylindrical body 24 abuts against and is stopped by this stopper 33, so that the amount of movement of the cylindrical body 24 is regulated. Note that g4 and g5 in FIG. 1 indicate the gaps between the lining plate 21, the armature 22, and the end plate 18 during energization when the braking is released by the excitation force, and the sum of these gaps is equal to the above-mentioned gap g3.

FIG. 2 shows a non-excited state when the electromagnetic brake having the above structure is used in the general-purpose motor 13 with the rotating shaft 12 in a horizontal mounting position. In this state, the armature 22 is pushed toward the end plate 18 by the biasing force of the spring 8 against the biasing force of the spring 32, forming a gap g3 between the armature 22 and the brake body 1, and moving the lining plate 21 toward the end plate 18. It is held in a braking state because it is compressed between the two.

Further, the energized state is shown in FIG. 1, and when the electromagnetic coil 4 is energized and energized from the above-mentioned braking state, the armature 22 is attracted toward the brake body 1 side by the magnetic force and is separated from the lining plate 21. The lining plate 21 and the cylinder 24 are separated from the end plate 18 by the urging force of the spring 32. And this lining plate 21
The movement of the lining plate 21 and the armature 2 is stopped by the stopper 33 of the hub 25.
Gaps g4 and g5 are formed between the end plate 18 and the end plate 18, respectively. In this way, the brake on the rotating shaft 12 is released.

For example, when the rotary shaft 12 thermally expands due to heat generated by the motor 13, the brake body 1 moves together with the rotary shaft 12 to which the hub 25 is attached via the end plate 18. During this movement, it is guided by the pin 11 inserted into the pin through hole 5, and
The brake body 1 is moved in the axial direction within the range (g2-g1).

In this way, the brake body 1 can move in the axial direction together with the rotating shaft 12 using the pin 11 as a guide, so it is suitable even when the rotating shaft 12 moves in the axial direction.

Further, as described above, when the brake is released, the lining plate 21 is forcibly moved toward the armature 22 by the bias of the spring 32, and this movement is restricted by the stopper 33 of the hub 25, so that the gear g4 , g5 to be securely held between the armature 22 and the end plate 18. Therefore, not only when the brake is used in an installation position where the rotating shaft 12 is horizontal, but also when the rotating shaft 12 is installed in a vertical position, the lining plate 21 is moved by its own weight to the armature 22 or the end plate 18. This prevents them from moving to the side and coming into contact with each other. This prevents friction noise from occurring due to rotational contact. At the same time, since the cylindrical body 24 that fixes the lining plate 21 is fitted into the hub 25, the lining plate 21 is supported in a stable state by this fitting, and surface wobbling of the lining plate 21 is suppressed. Ru. Therefore, the lining plate 21 is in rotational contact with the armature 22 or the end plate 18,
This prevents the generation of frictional noise. Due to the above, it is also suitable for use in cases where quietness is required.

Further, the lining plate 21 is fixed to the cylinder body 24,
Since the cylindrical body 24 and the hub 25 are fitted together with a key 26 interposed between them, it is also possible to prevent rattling noise of the lining plate 21 due to play in fitting.

Although the above embodiment is constructed as described above, in carrying out the present invention, the brake body, brake mounting body, end plate, lining plate, cylinder body, armature, armature,
It goes without saying that the specific structures, shapes, positions, etc. of the hub, bearings, springs, stoppers, etc. are not limited to the one embodiment described above, and can be configured and implemented in various ways.

〔Effect of the invention〕

According to the present invention described in detail above, it is possible to prevent rotational contact between the lining plate and the armature or the end plate when electricity is applied, there is no restriction on the mounting position, and the general-purpose motor has a rotating shaft that expands or moves in the axial direction. It has the advantage that it can also be used for

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIGS. 1 and 2 are longitudinal sectional side views taken along line A-A in FIG. 3 in different states, FIG. 3 is a front view, and FIG. is a partial vertical side view. 1... Brake body, 9... Brake mounting body,
12... Rotating shaft, 18... End plate, 21
...Lining plate, 22... Armature, 24...
...Cylinder, 25...Hub, 28...Bearing, 3
2...Spring, 33...Stopper.

Claims (1)

[Claims] 1. An armature that is moved by a spring force and an excitation force is disposed between the brake body and an end plate that is attached to the front of the body with a gap, and that is rotated integrally with a hub that is attached to a rotating shaft. In a non-excitation-operated electromagnetic general-purpose brake in which a lining plate is disposed between the armature and the end plate, the brake body is moved along the axial direction of the rotating shaft with respect to the guide portion of the brake mounting body. In addition to being movably attached, the end plate is attached to the rotating shaft via a bearing, the main body is connected to the end plate, and the cylindrical body having the lining plate fixed to the outer periphery is attached to the hub along the axial direction. A spring is provided to be movable and always bias the cylindrical body and the lining plate toward the brake mounting body, and a spring is provided on the brake mount side of the hub to abut against the end of the cylindrical body. An electromagnetic general-purpose brake characterized by the provision of an eggplant stopper.