JP2023157757A - Electromagnetic disc brake device for hoist and method for assembling the same - Google Patents

Abstract

To provide an electromagnetic disc brake device for a hoist capable of effectively separating a disc brake from a friction plate and capable of being easily assembled, and a method for assembling the electromagnetic disc brake device.SOLUTION: An electromagnetic disc brake device for a hoist comprises a hub, a brake disc, a friction plate, an armature, and an electromagnet, where the brake disc can move in an axial direction of a rotational shaft between the friction plate and the armature. The brake disc comprises: a disc push spring having a spring counterbore dug in a direction of the rotational shaft on a surface on the friction plate side, and inserted into the spring counterbore; and a spring presser plate that is fixed to the hub and can come into contact with the disc pushing spring, by receiving the spring presser plate, the disc pushing spring urges the brake disc away from the friction plate when the armature is attracted by the electromagnet.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electromagnetic disc brake device for a hoist and a method for assembling the same.

A device for pushing a brake disc of a hoist is described in Patent Document 1. Patent Document 1 states, ``An elastic body is provided on the outer periphery of the hub and is interposed between the brake disc and the friction plate, and the elastic body is compressed when the brake disc is pressed, and the armature is compressed. When attracted by the electromagnet, it elastically urges the brake disc away from the friction plate."

JP2019-142611A

Patent Document 1 describes a brake device that pushes a brake disc with an elastic body installed on the outer periphery of a hub. However, the outer periphery of the hub is located close to the rotating shaft when viewed from the brake disc, and it is not easy to separate the entire brake disc from the friction plate using the elastic force at this position. In addition, in a configuration in which the elastic body is an O-ring and is attached to the hub by the elastic force in the radial direction of the O-ring, the direction of the elastic force that fixes the O-ring to the hub and the direction of the elastic force that should bias the brake disc are different. are orthogonal. For this reason, there are problems that the process of attaching the O-ring becomes difficult and that it becomes difficult to adjust the elastic force that biases the brake disc.
An object of the present invention is to provide an electromagnetic disc brake device for a hoisting machine that can effectively separate a brake disc from a friction plate and is easy to assemble, and a method for assembling the same.

In order to solve the above problems, one of the electromagnetic disc brake devices of a typical hoisting machine of the present invention is provided coaxially on the outer periphery of a rotating shaft, rotates following the rotating shaft, and rotates along the outer periphery of the rotating shaft. a hub having a spline along the axial direction of the rotating shaft on a surface; and a hub that rotates together with the hub by engaging with the spline of the hub, and is supported by the hub so as to be movable in the axial direction of the rotating shaft. a brake disc; a friction plate disposed on one side along the moving direction of the brake disc to receive the brake disc; and a friction plate disposed on the other side along the moving direction of the brake disc to hold the brake disc. and an electromagnet that attracts the armature in a direction away from the brake disc. An electromagnetic disc brake device for an axially movable hoisting machine, wherein the brake disc has a spring counterbore dug in the direction of the rotation axis on a surface on the friction plate side, and the spring counterbore has a spring counterbore dug in the direction of the rotation axis. The disc push spring is inserted, and the disc push spring further includes a spring press plate fixed to the hub and capable of coming into contact with the disc push spring, and the disc press spring receives the spring press plate so that the armature can be pressed against the electromagnet. When the brake disc is attracted by the friction plate, the brake disc is urged in a direction away from the friction plate.
In addition, one of the representative methods of assembling the electromagnetic disc brake device for a hoisting machine of the present invention is that the electromagnetic disc brake device is provided coaxially on the outer periphery of a rotating shaft, rotates following the rotating shaft, and has a a hub having a spline along the axial direction of the rotating shaft; and a brake disc that rotates together with the hub by engaging with the spline of the hub and is supported by the hub so as to be movable in the axial direction of the rotating shaft. , a friction plate arranged on one side along the moving direction of the brake disc to receive the brake disc; and a friction plate arranged on the other side along the moving direction of the brake disc in a direction to press the brake disc against the friction plate. an armature that is elastically biased to A method for assembling an electromagnetic disc brake device for a movable hoisting machine, wherein after assembling the armature, the brake disc, and the friction plate, the brake disc is connected to the brake disc through an opening provided in the friction plate. The present invention is characterized in that it includes the steps of inserting a disc push spring into a spring counterbore provided on a surface on the friction plate side, and fixing a spring presser plate that can come into contact with the disc push spring to the hub.

According to the present invention, it is possible to provide an electromagnetic disc brake device for a hoisting machine, which can effectively separate a brake disc from a friction plate, and which is easy to assemble, and a method for assembling the same.
Problems, configurations, and effects other than those described above will be made clear by the following description of the embodiments.

1 is a cutaway side view showing main parts of a brake device according to a first embodiment of the present invention.

Examples will be described below with reference to the drawings.

An embodiment of the present invention will be described below with reference to FIG.
FIG. 1 is a cutaway side view showing a main part of an electromagnetic disc brake device for a hoisting machine in a braking state according to an embodiment of the present invention. A hub 2 that rotates following the rotating shaft 1 and has splines 3 on its outer peripheral surface, and a brake disc 4 that engages with the splines 3 of the hub 2, rotates together with the hub 2, and is movable in the axial direction of the rotating shaft 1. , a friction plate 5 disposed in the moving direction of the brake disc 4, an armature 6 that presses the brake disc 4 against the friction plate 5, and an electromagnet 7 that attracts the armature 6 in a direction away from the brake disc 4. The brake disc 4 is provided with a spring counterbore 9 into which a disc push spring 8 can be inserted.
Furthermore, the armature 6 is pressed by a brake spring 10, and can be assembled into the brake state shown in FIG. 1 by tightening an adjustment nut 12 onto the rod 11.
By attaching the spring press plate 13 in the above state, the disc press spring 8 has a structure to receive the spring press plate 13, and when the armature 6 is attracted to the electromagnet 7, the brake disc 4 is moved away from the friction plate 5. bias in the direction.
Further, an encoder mounting plate 15 is provided so that the encoder 14 can be mounted from the spring presser plate 13.

Here, the spring counterbore 9 is formed by digging down the surface of the brake disc 4 on the friction plate 5 side in the direction of the rotation axis.
The disk push spring 8 is inserted into the spring counterbore 9 in the direction of the rotation axis. The spring pressing plate 13 is fixed to the hub 2 and comes into contact with the disk pressing spring 8. The contact direction is on the armature 6 side in the direction of the rotation axis.
That is, the direction in which the disc pressing spring 8 is inserted, the direction in which the spring holding plate 13 fixes the disc pressing spring 8, the direction in which the spring holding plate 13 is fixed, and the direction in which the disc pressing spring 8 presses the brake disc 4 are all based on the rotation axis. The directions match on the armature 6 side.

Furthermore, the spring counterbore 9 is provided not on the hub 2 but on the surface of the brake disc 4 on the friction plate 5 side. Therefore, the disc pressing spring 8 can be disposed closer to the outer circumference of the brake disc 4 than the hub 2, and the entire brake disc 4 can be biased effectively and uniformly.

As an example, the spring counterbore 9 has an annular shape centered on the rotation axis, and the disk push spring 8 is an O-ring having substantially the same diameter as the spring counterbore 9. The O-ring can have a larger diameter than the O-ring that is attached to the hub 2, and can easily push the entire brake disc 4. Further, since the O-ring is fixed by the spring presser plate 13 rather than the O-ring's elastic force, the O-ring's elastic force can be determined only from the viewpoint of biasing the brake disc 4. As a result, the biasing force applied to the brake disc 4 can be easily adjusted.

As another example, a plurality of spring counterbores 9 may be provided on a predetermined circumference centered on the rotation axis, and the disk push spring 8 may be a coil spring inserted into each of the plurality of spring counterbores 9. . By employing a coil spring, the biasing force applied to the brake disc 4 can be precisely adjusted. The number of spring counterbores 9 and disc push springs 8 is arbitrary, but their arrangement is rotationally symmetrical. For example, it is preferable from the viewpoint of stability if the three spring counterbores 9 and the disk push springs 8 are arranged rotationally symmetrically.

Next, the friction plate 5 and encoder mounting plate 15 will be explained.
The friction plate 5 has an opening that exposes the spring counterbore 9.
The encoder mounting plate 15 is a plate fixed to the friction plate 5 by covering or extending over the opening of the friction plate 5, and is capable of mounting the encoder 14 that detects the state of the rotating shaft.

In this way, by providing an opening in the friction plate 5 and attaching the encoder mounting plate 15 to the opening, it is possible to attach the disc push spring 8 after assembling the armature 6, brake disc 4, and friction plate 5. The steps of inserting and fixing the spring retainer plate 13 to the hub 2 can be performed. After that, the steps of fixing the encoder attachment plate 15 to the friction plate 5 and attaching the encoder 14 to the encoder attachment plate 15 may be further performed.

In particular, assembly is facilitated by the fact that the steps after inserting the disc push spring 8 can be performed after the adjustment nut 12 is tightened on the rod 11 and the braking spring 10 is biased. As already explained, the direction in which the disc pressing spring 8 is inserted, the direction in which the spring holding plate 13 fixes the disc pressing spring 8, the fixing direction of the spring holding plate 13, and the direction in which the disc pressing spring 8 presses the brake disc 4 are as follows. The fact that they all match also contributes to improved ease of assembly. In addition, the encoder mounting plate 15 can be removed to expose the opening while the adjustment nut 12 is tightened to the rod 11, and the spring presser plate 13 and disk presser spring 8 can be inspected and replaced, making maintenance easier. will improve.

The shape and size of the opening of the friction plate 5 can be arbitrarily determined. Regarding the shape, it is preferable that the shape is rotationally symmetrical. If the opening is made larger, the spring counterbore 9 and the disc pressing spring 8 can be arranged further toward the outer circumference, and the brake disc 4 can be biased more effectively.

Note that the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the embodiments described above are described in detail to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to having all the configurations described. Furthermore, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add, delete, or replace a part of the configuration of each embodiment with other configurations.

1: Rotating shaft, 2: Hub, 3: Spline, 4: Brake disc, 5: Friction plate, 6: Armature, 7: Electromagnet, 8: Disc push spring, 9: Spring counterbore, 10: Braking spring, 11: Rod, 12: Adjustment nut, 13: Spring retainer plate, 14: Encoder, 15: Encoder mounting plate

Claims (8)

a hub that is coaxially disposed around the outer periphery of a rotating shaft, rotates to follow the rotating shaft, and has a spline on the outer peripheral surface that extends in the axial direction of the rotating shaft;
a brake disc that rotates together with the hub by meshing with the splines of the hub and is supported by the hub so as to be movable in the axial direction of the rotating shaft;
a friction plate arranged on one side along the moving direction of the brake disc and receiving the brake disc;
an armature disposed on the other side along the moving direction of the brake disc and elastically biased in a direction to press the brake disc against the friction plate;
an electromagnet that attracts the armature in a direction away from the brake disc,
An electromagnetic disc brake device for a hoisting machine in which the brake disc is movable in the axial direction of the rotating shaft between the friction plate and the armature,
The brake disc has a spring counterbore dug in the direction of the rotation axis on a surface on the friction plate side,
a disc push spring inserted into the spring counterbore;
further comprising a spring press plate fixed to the hub and capable of abutting the disc press spring;
An electromagnetic disc brake device for a hoisting machine, wherein the disc push spring receives the spring presser plate and urges the brake disc in a direction away from the friction plate when the armature is attracted to the electromagnet. The spring counterbore has an annular shape centered on the rotation axis,
The electromagnetic disc brake device for a hoisting machine according to claim 1, wherein the disc push spring is an O-ring having a diameter corresponding to a diameter of the spring counterbore. A plurality of the spring counterbores are provided on a predetermined circumference centered on the rotation axis,
The electromagnetic disc brake device for a hoisting machine according to claim 1, wherein the disc push spring is a coil spring inserted into each of the plurality of spring counterbores. The electromagnetic disc brake device for a hoisting machine according to claim 3, wherein the three spring counterbores are provided rotationally symmetrically. The electromagnetic disc brake device for a hoisting machine according to claim 1, wherein the friction plate has an opening that exposes the spring counterbore. It is characterized by further comprising an encoder mounting plate, which is a plate that covers or spans the opening and is fixed to the friction plate, to which an encoder for detecting the state of the rotation shaft can be attached. The electromagnetic disc brake device for a hoisting machine according to claim 5. a hub that is coaxially disposed around the outer periphery of a rotating shaft, rotates to follow the rotating shaft, and has a spline on the outer peripheral surface that extends in the axial direction of the rotating shaft;
a brake disc that rotates together with the hub by meshing with the splines of the hub and is supported by the hub so as to be movable in the axial direction of the rotating shaft;
a friction plate arranged on one side along the moving direction of the brake disc and receiving the brake disc;
an armature disposed on the other side along the moving direction of the brake disc and elastically biased in a direction to press the brake disc against the friction plate;
an electromagnet that attracts the armature in a direction away from the brake disc,
A method for assembling an electromagnetic disc brake device for a hoisting machine in which the brake disc is movable in the axial direction of the rotating shaft between the friction plate and the armature,
After assembling the armature, the brake disc, and the friction plate, inserting a disc push spring into a spring counterbore provided on a surface of the brake disc on the friction plate side through an opening provided in the friction plate. and,
fixing to the hub a spring press plate that can come into contact with the disc press spring;
A method for assembling an electromagnetic disc brake device for a hoisting machine, the method comprising: After the step of fixing the spring retainer plate to the hub, fixing an encoder mounting plate to the friction plate;
The method for assembling an electromagnetic disc brake device for a hoisting machine according to claim 7, further comprising: attaching an encoder to the encoder attachment plate.

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