JP2007192311A - Disk brake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk brake device in which the contact of a disk on a disk braking body when a brake is released is detected. <P>SOLUTION: This disk brake device 3 comprises a rotating shaft 2 rotating together with a rotating body and projecting from the rotating body, the disk 4 rotating together with the rotating shaft 2 and movable in the axial direction of the rotating shaft 2, a fixed plate 5 facing the axial end side of the disk 4, an armature facing the anti-axial end side of the disk 4, and brought into contact with and separated from the disk 4 by moving in the axial direction of the rotating shaft 2 and brought into contact with and separated from the fixed plate 5 by moving the disk 4 in the axial direction of the rotating shaft 2 to release and apply the brake, and a detector 10 having a detecting element 10a installed on the fixed plate 5 and brought into contact with and separated from the disk 4 when the disk 4 is separated from and brought into contact with the fixed plate 5 and detecting the abnormal contact of the disk 4 with the fixed plate 5 when the brake is released. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disc brake device that detects an abnormal contact between a disc and a lining when the brake is released.

  In a conventional disc brake device, an outer disc having a through hole in the center, an inner disc, an armature, and an electromagnet are arranged so that the axis of the through hole coincides with the axis of the braked rotary machine. Lined up at the end of the shaft, the inner disk engages with the axis of the braked rotating machine and can freely move in the axial direction, and the outer disk, armature, and electromagnet are connected to the rotating direction of the braked rotating machine. In the constrained one, the armature is provided with a slot-like hole around its periphery, and is installed so that a predetermined amount of change can be rotated with respect to the rotation direction of the braked rotating machine. There is one that can detect an abnormality (for example, see Patent Document 1).

JP-A-6-98497

  In the conventional disc brake device, the space between the disc and the lining tends to be reduced in order to reduce the size in the width direction as the space is reduced and the device is downsized. As a result, when the disc rotates while the disc and the lining are in abnormal contact when the brake is released, abnormal wear of the lining occurs, and there is a problem that the brake performance is remarkably lowered. Further, in the conventional disc brake device described in Patent Document 1, it is possible to prevent abnormal wear by operating the detector at the time of abnormal contact where the armature and the disc are not separated when the brake is released. There was a problem that the detector did not work when abnormal contact between the inner disk and outer disk (fixed plate) that occurred easily.

  The present invention has been made to solve the above-described problems. In the case where the inner disk and the outer disk (fixed plate) are in abnormal contact with each other, the space saving and the downsizing of the apparatus are supported. A disc brake device including a detector capable of detecting contact is provided.

  In the disc brake device according to the present invention, the rotating shaft that rotates and projects in synchronization with the rotating body, the disc that rotates in synchronization with the rotating shaft and is movable in the axial direction of the rotating shaft, and the shaft end side of the disc The fixed plate that faces the disc and the opposite side of the disc opposite to the end of the disc moves in the axial direction of the rotating shaft and moves away from the disc. And an armature for brake braking, and a detector that is provided on the fixed plate and has a detector that comes in contact with the disk when the disk and the fixed plate come in contact with each other and detects abnormal contact between the disk and the fixed plate when the brake is released. Is.

  According to the present invention, when the brake is released, an abnormal contact between the disc and the braking body can be detected.

Embodiment 1 FIG.
1 is a cross-sectional view showing the disc brake device when the brake is released in Embodiment 1 of the present invention, FIG. 2 is a view corresponding to FIG. 1 showing the disc brake device when braking, and FIG. 3 is when the disc brake device is released. FIG. 2 is a view corresponding to FIG. 1 showing a state in which the disk and the lining of the fixed plate are in abnormal contact.
In the figure, reference numeral 1 denotes a hoisting machine main body, and 2 denotes a hoisting machine main body 1, which is synchronized with a rotating body comprising an elevator car and a driving sheep (not shown) around which suspension means for suspending a counterweight is wound. Thus, the rotating shaft rotates, and the shaft end portion protrudes from the outer shell of the hoisting machine main body 1. A disk brake device 3 is installed on the outer shell of the hoisting machine body 1 and engages with the rotary shaft 2 to brake the hoisting machine. The configuration of the disc brake device 3 will be described below.
Reference numeral 4 denotes a disk-shaped disk, and the rotary shaft 2 passes through a through hole provided in the center. The inner periphery of the through-hole provided in the disk 4 and the outer periphery of the rotary shaft 2 are formed by splines (not shown) that fit into each other. The disk 4 rotates in synchronization with the rotary shaft 2, and the rotary shaft 2. It is movable in the axial direction. 4a is a cylindrical protrusion projecting from the center of the front side (shaft end side) of the disk 4 and has an inner peripheral surface facing the outer peripheral surface of the rotary shaft 2 in a non-contact manner.
Reference numeral 5 denotes a fixed plate facing the front side of the disk 4, which is connected and fixed to the hoisting machine main body 1 side and is restrained in both the rotational direction and the axial direction of the rotary shaft 2. 5a is a lining provided on the fixed plate 5, and can be separated from the front surface of the disk 4 as the disk 4 moves. Reference numeral 5b denotes a through hole provided in the central portion of the fixed plate 5 through which the rotating shaft 2 and the protruding portion 4a penetrate without contact. That is, the tip of the protrusion 4 a is on the front side (shaft end side) of the fixed plate 5.
Reference numeral 6 denotes an armature facing the back side (on the opposite end side) of the disk 4, and the rotation shaft 2 passes through the center portion in a non-contact manner. It is movable in the direction of separation of the fixed plate 5). The armature 6 is made of a magnetic material. 6a is a lining provided on the armature 6 to be paired with the lining 5a of the fixed plate 5. The armature 6 can be moved away from and attached to the back surface of the disk 4.
Reference numeral 7 denotes an electromagnetic magnet fixed to the outer shell of the hoisting machine main body 1 and facing the back side (opposite end side) of the armature 6, and the rotary shaft 2 penetrates the central part in a non-contact manner. Here, the electromagnetic magnet 7 attracts the armature 6 when energized and has a magnetic force. At this time, the pair of linings 5a and 6a are located away from both surfaces of the disk 4, and the disk 4 and the rotating shaft 2 are in a state of releasing a brake that can rotate.
Reference numeral 8 denotes a pressing spring provided to be compressed between the armature 6 and the electromagnetic magnet 7. The pressing spring 8 pushes the armature 6 away from the electromagnetic magnet 7 when the electromagnetic magnet 7 is cut off from electric power and has no magnetic force, and moves the armature 6 and the disk 4 to the fixed plate 5 side. As a result, the pair of linings 5a and 6a are brought into contact with both surfaces of the disk 4, and the disk 4 and the rotating shaft 2 are in a brake braking state in which the rotation of the disk 4 and the rotating shaft 2 is suppressed.
Reference numeral 9a denotes a gap between the disk 4 and the fixed plate lining 5a, and 9b denotes a gap between the disk 4 and the armature lining 6a. That is, when the brake is released, the disc 4 is kept at a predetermined interval with the pair of linings 5a and 6a, and the gaps 9a and 9b are at a predetermined interval. (See FIG. 1). At the time of braking, the disk 4 comes into contact with the pair of linings 5a and 6a, and the gaps 9a and 9b are zero (see FIG. 2).

A feature of the present invention is the above-described protrusion 4a and a structure for detecting the contact / separation between the lining 5a of the fixing plate 5 and the disk 4 while being in contact with the protrusion 4a. These will be described below.
Reference numeral 10 denotes a detector provided on the front side (shaft end side) of the fixed plate 5. Reference numeral 10 a denotes a detector extending from the detector 10, and faces the protrusion 4 a of the disk 4. Here, the position of the detector 10a is in contact with the protrusion 4a of the disk 4 when the gap 9a is zero (during normal brake braking), and when the gap 9a maintains a predetermined distance (when normal brake is released). Is located away from the protrusion 4a of the disk 4. Further, when the detector 10a is separated from the protrusion 4a of the disk 4, the detector 10 is shut off.

The operation of the disc brake device 3 configured as described above will be described.
During braking, the front surface of the disk 4 and the lining 5a come into contact with each other, and the gap 9a is zero. Therefore, the detector 10a and the protrusion 4a of the disk 4 are in contact with each other. Thereby, the detector 10 detects that it is in a brake braking state.
When the brake is released, the front surface of the disk 4 is separated from the lining 5a, and the gap 9a is kept at a predetermined interval. Therefore, the detector 10a and the protrusion 4a of the disk 4 are separated. Thereby, the detector 10 is shut off, and it is confirmed that the gap 9a is in a normal state in which a predetermined interval is secured.
However, due to the malfunction of the spline engaging the rotating shaft 2 and the disk 4, the disk 4 does not return even when the brake is released while moving to the fixed plate 5 side during brake braking, and the front side of the disk 4 and the lining A case in which the disk 4 rotates with the 5a being in contact is likely to occur. When this state occurs, abnormal wear of the lining 5a occurs (see FIG. 3). In this case, since the protrusion 4a of the disk 4 remains in contact with the detector 10a, the detector 10 is not shut off. Thereby, it can be detected as an abnormality that the detector 10 is not shut off even when the brake is released.

  According to the disc brake device configured as described above, the disc 4 is movably provided on the rotary shaft 2 and moves in a direction to come in contact with and separate from the fixed plate 5 when the brake is released and during brake braking. Although it is in contact with the lining 5a, abnormal contact between the lining 5a of the fixed plate 5 and the disk 4 that is likely to occur when the brake is released due to the aforementioned poor engagement state of the disk 4 and the rotating shaft 2 can be detected immediately.

  Further, the abnormal contact described above can be immediately detected and detected, so that abnormal wear of the lining 5a caused by the rotation of the disc 4 with abnormal contact can be prevented, and a safer disc brake device can be obtained.

Embodiment 2
4 is a cross-sectional view showing a disc brake device according to Embodiment 2 of the present invention. In the first embodiment, the detector 10 is arranged on the shaft end side of the fixed plate so that the detector 10 a is in contact with the tip of the protrusion 4 a of the disk 4. However, in the second embodiment, the protrusion 4 a is eliminated from the disk 4, the detector 10 is disposed on the disk 4 side of the fixed plate 5, and the detector 10 a is disposed so as to be in contact with the front surface of the disk 4.

  As a result, it is not necessary to provide the protrusion 4a on the disk 4, the structure can be simplified, and the axial dimension of the disk brake device 3 can be reduced, thereby saving space.

It is sectional drawing which shows the time of brake releasing of the disc brake apparatus in Embodiment 1 of this invention. FIG. 2 is a view corresponding to FIG. 1 and showing the brake operation of the disc brake device. FIG. 2 is a view corresponding to FIG. 1 showing a state where the disc and the fixed plate are in abnormal contact when the disc brake device is released. It is sectional drawing which shows the disc brake apparatus in Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hoisting machine main body 2 Rotating shaft 3 Disc brake device 4 Disc 5 Fixing plate 6 Armature 5a, 6a Lining 7 Electromagnetic magnet 8 Push spring 9a, 9b Gap 10 Detector 10a Detector

Claims (3)

A rotating shaft that rotates and projects in synchronization with the rotating body;
A disk that rotates in synchronization with the rotating shaft and is movable in the axial direction of the rotating shaft;
A fixing plate facing the shaft end side of the disk;
Opposite the opposite end of the disk, move in the axial direction of the rotating shaft, move away from the disk, and simultaneously move the disk in the axial direction of the rotating shaft, move away from the fixed plate and release the brake And an armature for brake braking,
A detector that is provided on the fixed plate and has a detector that comes into contact with and separates from the disk when the disk and the fixed plate are separated from each other; a detector that detects abnormal contact between the disk and the fixed plate when a brake is released;
A disc brake device comprising: The disc includes a protrusion that projects through the fixed plate on the shaft end side in a non-contact manner and protrudes toward the shaft end of the fixed plate;
2. The disc brake device according to claim 1, wherein a detector is provided on a shaft end side of the fixed plate, and a detector of the detector is in contact with and separated from the protrusion.   3. The disc brake device according to claim 1, wherein the disc brake device is used for an elevator hoist.

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