Electromagnetic Disk Brake Device for a Rewinder and Its Assembly Method

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

Technical Field

[0001] The present invention relates to an electromagnetic disk brake device for a hoist and a method for assembling the same.

Background Art

[0002] A device for pressing a brake disk of a hoist is described in Patent Document 1. This Patent Document 1 describes that "an elastic body is provided on the outer peripheral portion of the hub, which is interposed between the brake disk and the friction plate. When the brake disk is pressed, the elastic body is compressed, and when the armature is attracted to the electromagnet, the elastic body elastically biases the brake disk in a direction away from the friction plate."

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Patent Document 1 describes a brake device that presses a brake disk with an elastic body installed on the outer periphery of the hub. However, the outer periphery of the hub is a position close to the rotation axis when viewed from the brake disk, and it is not easy to separate the entire brake disk from the friction plate with the elastic force at this position. Further, in a configuration where 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 for fixing the O-ring to the hub and the direction of the elastic force to be biased against the brake disk are orthogonal. For this reason, there are problems that the process of attaching the O-ring becomes difficult and the adjustment of the elastic force for biasing the brake disk becomes difficult. An object of the present invention is to provide an electromagnetic disk brake device for a hoist that can effectively separate a brake disk from a friction plate and is easy to assemble, and a method for assembling the same.

Means for Solving the Problem

[0005] In order to solve the above problems, one of the electromagnetic disk brake devices of the representative winch of the present invention is coaxially provided on the outer periphery of a rotating shaft, rotates following the rotating shaft, and has a hub having a spline along the axial direction of the rotating shaft on its outer peripheral surface. A brake disk that meshes with the spline of the hub and rotates integrally with the hub, and is supported by the hub so as to be movable in the axial direction of the rotating shaft. A friction plate disposed on one side along the moving direction of the brake disk to receive the brake disk, and an armature disposed on the other side along the moving direction of the brake disk and elastically biased in a direction to press the brake disk against the friction plate. An electromagnet that attracts the armature in a direction away from the brake disk. The brake disk is an electromagnetic disk brake device of a winch that is movable in the axial direction of the rotating shaft between the friction plate and the armature. The brake disk has a spring seat groove dug in the direction of the rotating shaft on the surface on the friction plate side, and further includes a disk pressing spring inserted into the spring seat groove and a spring pressing plate fixed to the hub and capable of abutting against the disk pressing spring. When the armature is attracted by the electromagnet, the disk pressing spring biases the brake disk in a direction away from the friction plate by receiving the spring pressing plate. Also, one of the assembling methods of the electromagnetic disk brake device of the hoisting machine according to the representative present invention is a hub that is coaxially provided on the outer periphery of the rotating shaft, rotates following the rotating shaft, and has a spline along the axial direction of the rotating shaft on the outer peripheral surface, and a brake disk that meshes with the spline of the hub to rotate integrally with the hub and is supported by the hub so as to be movable in the axial direction of the rotating shaft, a friction plate disposed on one side along the moving direction of the brake disk to receive the brake disk, and an armature disposed on the other side along the moving direction of the brake disk and elastically biased in a direction to press the brake disk against the friction plate, and an electromagnet that attracts the armature in a direction away from the brake disk, and the brake disk is movable in the axial direction of the rotating shaft between the friction plate and the armature. In the assembling method of the electromagnetic disk brake device of the hoisting machine, after assembling the armature, the brake disk, and the friction plate, a step of inserting a disk pressing spring into a spring seat groove provided on the surface of the brake disk on the friction plate side through an opening provided in the friction plate, and a step of fixing a spring pressing plate capable of abutting against the disk pressing spring to the hub are included.

Advantages of the Invention

[0006] According to the present invention, it is possible to effectively separate the brake disk from the friction plate, and to provide an electromagnetic disk brake device for a hoisting machine that is easy to assemble and its assembling method. Problems, configurations, and effects other than those described above will be clarified by the description of the following embodiments.

Brief Description of the Drawings

[0007]

Figure 1

Embodiments for Carrying Out the Invention

[0008] Hereinafter, embodiments will be described with reference to the drawings.

Embodiment

[0009] Hereinafter, an embodiment of the present invention will be described with reference to FIG. 1. FIG. 1 is a broken side view showing a main part of the braking state of an electromagnetic disk brake device of a hoisting machine according to an embodiment of the present invention. A hub 2 that rotates following the rotation shaft 1 and has a spline 3 on its outer peripheral surface, a brake disk 4 that meshes with the spline 3 of the hub 2 and rotates integrally with the hub 2 and is movable in the axial direction of the rotation shaft 1, a friction plate 5 disposed in the moving direction of the brake disk 4, an armature 6 that presses the brake disk 4 against the friction plate 5, and an electromagnet 7 that attracts the armature 6 in a direction away from the brake disk 4 are provided. The brake disk 4 is provided with a spring seat drilling 9 into which a disk pressing spring 8 can be inserted. Furthermore, the armature 6 is pressed by a braking spring 10 and can be incorporated into the braking state of FIG. 1 by tightening an adjusting nut 12 on a rod 11. By attaching a spring retainer plate 13 in the above state, the disk pressing spring 8 receives the spring retainer plate 13, and when the armature 6 is attracted by the electromagnet 7, the brake disk 4 is biased in a direction away from the friction plate 5. Also, an encoder mounting plate 15 is provided so that an encoder 14 can be mounted from the spring retainer plate 13.

[0010] Here, the spring seat drilling 9 is formed by digging down the surface of the brake disk 4 on the friction plate 5 side in the rotation shaft direction. The disk pressing spring 8 is inserted in the rotation shaft direction with respect to the spring seat drilling 9. And the spring retainer plate 13 is fixed to the hub 2 and abuts against the disk pressing spring 8. The abutting direction is the armature 6 side in the rotation shaft direction. That is, the direction in which the disk compression spring 8 is inserted, the direction in which the spring retainer plate 13 fixes the disk compression spring 8, the fixing direction of the spring retainer plate 13, and the direction in which the disk compression spring 8 presses the brake disk 4 all coincide on the armature 6 side in the direction of the rotation axis.

[0011] Furthermore, the spring seat 9 is provided on the surface of the friction plate 5 side of the brake disk 4, rather than on the hub 2. For this reason, the disk compression spring 8 can be disposed on the outer peripheral side of the brake disk 4 rather than on the hub 2, and the entire brake disk 4 can be effectively and uniformly biased.

[0012] As an example, the spring seat 9 is annular with the rotation axis as the center, and the disk compression spring 8 is an O-ring having substantially the same diameter as the spring seat 9. An O-ring having a larger diameter than that used in the configuration of attaching to the hub 2 can be used, and the entire brake disk 4 can be easily pressed. Also, since the O-ring is fixed by the spring retainer plate 13 rather than by the elastic force of the O-ring, the elastic force of the O-ring can be determined only from the viewpoint of biasing the brake disk 4. As a result, adjustment of the biasing force on the brake disk 4 becomes easy.

[0013] As another example, a plurality of spring seats 9 may be provided on a predetermined circumference centered on the rotation axis, and the disk compression spring 8 may be a coil spring inserted into each of the plurality of spring seats 9. By adopting a coil spring, the biasing force on the brake disk 4 can be precisely adjusted. The number of the spring seats 9 and the disk compression springs 8 is arbitrary, but their arrangement is rotationally symmetric. For example, arranging three spring seats 9 and disk compression springs 8 in a rotationally symmetric manner is preferable from the viewpoint of stability.

[0014] Next, the friction plate 5 and the encoder mounting plate 15 will be described. The friction plate 5 has an opening that exposes the spring seat 9. The encoder mounting plate 15 is a plate that covers or spans across the opening of the friction plate 5 and is fixed to the friction plate 5, and an encoder 14 for detecting the state of the rotating shaft can be mounted thereon.

[0015] In this way, by providing an opening in the friction plate 5 and attaching the encoder mounting plate 15 to the opening, after assembling the armature 6, the brake disk 4, and the friction plate 5, the steps of inserting the disk compression spring 8 and fixing the spring retainer plate 13 to the hub 2 can be performed. Thereafter, further, the steps of fixing the encoder mounting plate 15 to the friction plate 5 and attaching the encoder 14 to the encoder mounting plate 15 may be performed.

[0016] In particular, after tightening the adjusting nut 12 on the rod 11 to generate the biasing force of the brake spring 10, the steps after the insertion of the disk compression spring 8 can be performed, which facilitates the assembly. As already described, the direction in which the disk compression spring 8 is inserted, the direction in which the spring retainer plate 13 fixes the disk compression spring 8, the fixing direction of the spring retainer plate 13, and the direction in which the disk compression spring 8 presses the brake disk 4 all coincide, which also contributes to the improvement of the assemblability. Further, with the adjusting nut 12 tightened on the rod 11, the encoder mounting plate 15 can be removed to expose the opening, and the spring retainer plate 13 and the disk compression spring 8 can be inspected and replaced, so the maintainability is improved.

[0017] The shape and size of the opening of the friction plate 5 can be arbitrarily determined. Regarding the shape, it is preferably rotationally symmetric. If the opening is enlarged, the spring seat reamer 9 and the disk compression spring 8 can be arranged more on the outer peripheral side, and the brake disk 4 can be biased more effectively.

[0018] Note that the present invention is not limited to the above-described embodiments, and various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Also, 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 other configurations for a part of the configuration of each embodiment.

Description of Reference Numerals

[0019] 1: Rotation axis, 2: Hub, 3: Spline, 4: Brake disk, 5: Friction plate, 6: Armature, 7: Electromagnet, 8: Disk compression spring, 9: Spring seat drilling, 10: Braking spring, 11: Rod, 12: Adjusting nut, 13: Spring retainer plate, 14: Encoder, 15: Encoder mounting plate

Claims

1. A hub coaxially provided on the outer periphery of a rotating shaft, rotating following the rotating shaft, and having a spline along the axial direction of the rotating shaft on its outer peripheral surface; A brake disk that meshes with the spline of the hub to rotate integrally with the hub and is supported by the hub so as to be movable in the axial direction of the rotating shaft; A friction plate disposed on one side along the moving direction of the brake disk for receiving the brake disk; An armature disposed on the other side along the moving direction of the brake disk and elastically biased in a direction to press the brake disk against the friction plate; An electromagnet that attracts the armature in a direction away from the brake disk, and The brake disk is an electromagnetic disk brake device of a hoist that is movable in the axial direction of the rotating shaft between the friction plate and the armature, The brake disk has a spring seat recess dug in the direction of the rotating shaft on the surface on the friction plate side, A disk compression spring inserted into the spring seat recess, and The hub further includes a spring retainer plate fixed to the hub and capable of abutting against the disk compression spring, The disk compression spring biases the brake disk in a direction away from the friction plate when the armature is attracted by the electromagnet by receiving the spring retainer plate, The spring seat recess is annular with the rotating shaft as the center, The disk compression spring is an O-ring having a diameter corresponding to the diameter of the spring seat recess, and is characterized by an electromagnetic disk brake device of a hoist.

2. A hub coaxially provided on the outer periphery of a rotating shaft, rotating following the rotating shaft, and having a spline along the axial direction of the rotating shaft on its outer peripheral surface; A brake disk that meshes with the spline of the hub to rotate integrally with the hub and is supported by the hub so as to be movable in the axial direction of the rotating shaft; A friction plate disposed on one side along the moving direction of the brake disk for receiving the brake disk; An armature disposed on the other side along the moving direction of the brake disk and elastically biased in a direction to press the brake disk against the friction plate; An electromagnet that attracts the armature in a direction away from the brake disk, and An electromagnetic disk brake device for a hoist, wherein the brake disk is movable in the axial direction of the rotary shaft between the friction plate and the armature, The brake disk has a spring seat groove dug in the direction of the rotary shaft on the surface on the friction plate side, A disk compression spring inserted into the spring seat groove, Further provided with a spring retainer plate fixed to the hub and capable of abutting against the disk compression spring, When the armature is attracted to the electromagnet, the disk compression spring biases the brake disk in a direction away from the friction plate by receiving the spring retainer plate, The friction plate has an opening exposing the spring seat groove, An electromagnetic disk brake device for a hoist, further comprising an encoder mounting plate which covers the opening or spans the opening and is fixed to the friction plate, and to which an encoder for detecting the state of the rotary shaft can be mounted.

3. A hub coaxially provided on the outer periphery of a rotary shaft, rotating following the rotary shaft, and having a spline along the axial direction of the rotary shaft on its outer peripheral surface, A brake disk that meshes with the spline of the hub and rotates integrally with the hub, and is supported by the hub so as to be movable in the axial direction of the rotary shaft, A friction plate disposed on one side along the moving direction of the brake disk, for receiving the brake disk, An armature disposed on the other side along the moving direction of the brake disk, and elastically biased in a direction of pressing the brake disk against the friction plate, An electromagnet for attracting the armature in a direction away from the brake disk, A method of assembling an electromagnetic disk brake device for a hoist, wherein the brake disk is movable in the axial direction of the rotary shaft between the friction plate and the armature, After assembling the armature, the brake disk and the friction plate, a step of inserting a disk compression spring into a spring seat groove provided on the surface of the brake disk on the friction plate side through an opening provided in the friction plate, A step of fixing a spring retainer plate capable of abutting against the disk compression spring to the hub, After the step of fixing the spring retainer plate to the hub, a step of fixing an encoder mounting plate to the friction plate; a step of attaching an encoder to the encoder mounting plate; A method for assembling an electromagnetic disk brake device of a hoisting machine, characterized by including the above steps.

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