JP2009214954A - Hoisting machine disk brake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hoisting machine disk brake device with a clearance adjusting device capable of securing a proper brake clearance. <P>SOLUTION: This hoisting machine disc brake device with a clearance adjusting device holding a brake disk at a position spaced from an armature and a stationary plate when a brake is canceled comprises a guide device held by the stationary plate movably in an axial direction and contacting the brake disk to restrain an axial position of the brake disk, and a drive mechanism driving the guide device to a braking position or a non-braking position according to an action of the armature. The brake clearance of the hoisting machine disk brake device can be properly secured. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hoisting machine disc brake device, and more particularly to an elevator hoisting disc brake device capable of ensuring a brake clearance.

  A conventional hoisting machine disc brake device has an electromagnetic coil and a braking spring, and is provided on a rotating shaft between a brake main body arranged with respect to a rotating shaft, a fixed plate fixed to the brake main body, and the brake main body and the fixing plate. A brake disc that cannot rotate with respect to the rotating shaft and is slidable in the axial direction, and is disposed between the brake body and the brake disc, and is disposed so as to be rotatable with respect to the rotating shaft and movable in the axial direction. At the time of energization, the brake body is attracted to release the brake disk, and the electromagnetic coil is deenergized by an armature that is pressed by a brake spring to brake the brake disk between the fixed plate. In order to quickly and easily magnetically attract the amateur by the electromagnetic coil, the gap (brake gap) between the amateur or the fixed plate and the brake disk is set to about 0.1 to 0.2 mm.

  Gap adjustment to maintain the brake gap in order to keep the brake disc away from both the amateur and the fixed plate when releasing the brake, and to prevent the brake disc from coming into contact with the armature or the fixed plate during normal operation A hoisting machine disc brake device provided with the device has been proposed. When the amateur is magnetically attracted, this gap adjusting device moves the brake disc axially toward the amateur by a spring attached to the hub portion of the rotating shaft, and makes a constant movement between the amateur and the fixed plate and the brake disc. A large brake clearance is ensured (see, for example, Patent Document 1).

JP-A-11-230203

  However, in such a conventional hoisting machine disc brake device, the hub is used as a reference position for adjusting the brake clearance by adjusting the position of the brake disc. In order to realize a brake clearance of about 0.1 to 0.2 mm, high accuracy is required for positioning the hub portion with respect to the armature or the fixed plate. In particular, since the hub is attached to the rotating shaft, it is necessary to improve not only the hub mounting position on the rotating shaft but also the accuracy of the axial position of the rotating shaft itself, and it is difficult to realize a desired brake clearance. It is.

  Accordingly, an object of the present invention is to provide a hoisting machine disc brake device provided with a clearance adjusting device capable of ensuring an appropriate brake clearance.

  A hoisting machine disc brake device according to the present invention includes an electromagnetic coil and a braking spring, a brake main body arranged with respect to a rotary shaft, a fixed plate fixed to the brake main body, and a rotary shaft between the brake main body and the fixed plate. A brake disc which is provided on the brake shaft and is not rotatable with respect to the rotation shaft and is slidable in the axial direction, and is provided between the brake body and the brake disc, and is arranged to be rotatable with respect to the rotation shaft and movable in the axial direction When the electromagnetic coil is energized, it is attracted to the brake body to release the brake disk, and the deenergizing force of the electromagnetic coil is pressed by the brake spring to brake the brake disk between the fixed plate and the brake plate. Holding the brake disc in a position separated from both the amateur and the fixed plate when the brake is released In the hoisting machine disc brake device comprising the gap adjusting device, the gap adjusting device is held by the fixed plate so as to be movable in the axial direction, and contacts the brake disc to regulate the axial position of the brake disc. And a drive mechanism for driving the guide device to a braking position or a non-braking position in accordance with the operation of the amateur.

  According to the present invention, it is possible to provide a hoisting machine disc brake device provided with a clearance adjusting device capable of ensuring an appropriate brake clearance.

Embodiment 1 FIG.
1 to 5 are views showing an embodiment of the hoisting machine disc brake device of the present invention, FIG. 1 is a schematic front view of the hoisting machine disc brake device of the present invention, and FIG. 2 is a line of FIG. FIG. 3 is a schematic cross-sectional view taken along line II-II, FIG. 3 is a schematic cross-sectional view showing the gap adjusting device of FIG. 2 in a braking position, and FIG. 4 is a schematic cross-sectional view showing the gap adjusting device of FIG. FIG. 5 is an enlarged cross-sectional view of the gap adjusting device along the line V-V in FIG.

  1 to 5, the hoisting machine disc brake device of the present invention has an electromagnetic coil 1 and a braking spring 2, an annular brake body 4 arranged concentrically with respect to a rotating shaft 3, and a sleeve 5 on the brake body 4. And a fixing plate 7 fixed by three covered fixing bolts 6. The fixed plate 7 is also an annular disc concentrically arranged with respect to the rotating shaft 3 and is separated from the brake body 4 by an axial distance that is the direction of the axis of the rotating shaft 3 according to the length of the sleeve 5. In this way, the rotating shaft 3 is inserted into the center port 8 of the brake body 4 and the center hole 9 of the fixing plate 7. Unless otherwise specified in this specification, the terms “axial direction” or “radial direction” mean the axial direction of the rotating shaft or the radial direction of the rotating shaft, respectively.

  A hub 10 is fixed on the rotary shaft 3, and a brake disk 12 is provided on the hub 10 so as to be movable in the axial direction via a spline 11 on the outer peripheral portion. Thus, the brake disk 12 is provided on the rotating shaft 3 between the brake body 4 and the fixed plate 7 and cannot rotate with respect to the rotating shaft 3 and rotates together with the rotating shaft 3, but in the axial direction of the rotating shaft 3. Is slidable and movable in the axial direction between the brake body 4 and the fixed plate 7. The brake disc 12 is provided with brake pads 13 on both sides.

  Between the brake body 4 and the brake disk 12, an armature 15 is provided which is an annular magnetic plate member having a center hole 14 and concentric with the rotary shaft 3. The amateur 15 is supported by the sleeve 5 and can slide on the sleeve 5 in the axial direction. Therefore, the armature 15 can rotate with respect to the rotating shaft 3 and the brake disc 12 and can move in the axial direction, and cannot rotate with respect to the brake body 4 and the fixed plate 7. As shown in FIGS. 2 and 3, the amateur 15 is always biased to the right side in the drawing and pressed against the brake disc 12 by the braking spring 2. At this time, a gap G is formed between the brake body 4 and the amateur 15.

  2 and 3, the amateur 15 is pressed by the brake spring 2 to press the brake disk 12 toward the fixed plate 7 to deenergize the electromagnetic coil 1, and the amateur 15, the fixed plate 7, and the brake A braking force by friction is generated between the pad 13 and the pad 13. When the electromagnetic coil 1 is energized, as shown in FIG. 4, the armature 15 is attracted to the brake body 4 by the magnetic flux generated by the electromagnetic coil 1, and is attracted to the left in the figure to eliminate the axial gap G. The axial distance between the armature 15 holding the brake disk 12 and the fixed plate 7 is increased by a distance corresponding to the gap G, and the brake disk 12 is released.

  The hoisting machine disc brake device further holds the brake pad 13 of the brake disc 12 at a position spaced apart from the armature 15 or the fixed plate 7 by the axial gap g1 or g2 with respect to the rotary shaft 3 when the brake is released as shown in FIG. An adjustment device 16 is provided.

  The gap adjusting device 16 is held on the fixed plate 7 so as to be movable in the axial direction with respect to the rotary shaft 3, and a guide device 17 that contacts the brake disc 12 and regulates the axial position of the brake disc 12. And a drive mechanism 18 for driving to the braking position shown in FIG. 3 or the non-braking position shown in FIG.

  The guide device 17 is supported by a frame 21 fixed to the fixing plate 7 by bolts 20 passing through the long holes 19, and a bolt 22 extending through the frame 21 and movable in the radial direction of the rotary shaft 3. 23 is provided with a bracket 24 biased toward the brake disk 12. Thus, the bracket 24 is elastically supported by the compression spring 23 so as to be movable in the radial direction with respect to the fixed plate 7.

  The bracket 24 has a long plate-shaped bracket main body 28 and a pair of support portions 29 that rise from both ends of the bracket main body 28 toward the brake disc 12. A locking nut 25 is provided at the tip of the bolt 22 fixed to both ends of the bracket body 28 so that the bolt 22 does not come out of the frame 21. An adjustment bolt 27 is also provided at the center of the bracket body 28. The adjustment bolt 27 extends through the frame 21 and adjusts the compression state of the compression spring 23 by limiting the radial movement range by the adjustment nut 26. .

  The guide device 17 also includes a roller carriage 30 provided so as to be axially movable with respect to the bracket 24, and a roller 31 that is rotatably supported by the roller carriage 30 and contacts the brake disk 12 from both axial sides. Yes. In the illustrated example, the roller 31 is a tapered roller that contacts the peripheral corner of the brake disk 12 with a tapered surface 31a.

  The roller carriage 30 is inserted between a long plate-shaped carriage main body 32 and a pair of support portions 29 extending from both ends of the carriage main body 32 toward the bracket 24 and provided at both ends of the bracket 24 for adjustment. An attachment plate 34 attached to the support portion 29 of the bracket 24 by a rod 33 and a holding portion 36 that extends from both ends of the carriage main body 32 toward the brake disc 12 and pivotally supports the roller 31 by a pin 35. .

  An adjustment rod 33 is fixed to the mounting plate 34 of the roller carriage 30, and this adjustment rod 33 can move in the axial direction through a through-hole 37 provided in each of the support portions 29 of the bracket 24 at one end on the armature 15 side. And has an abutting end 38 facing the armature 15. The other end of the adjustment rod 33 shown in FIG. 3 is inserted into a compression spring 39 provided between the support portion 29 of the bracket 24 and extends through the through hole 37 of the support portion 29 so as to be movable in the axial direction. Further, it protrudes to the outside through a long hole 40 which is a through hole provided in the fixing plate 7 and the frame 21, and an engaging nut 41 is provided at the protruding end.

  A driving mechanism 18 that drives the guide device 17 to the braking position shown in FIG. 3 or the non-braking position shown in FIG. 4 according to the operation of the amateur 15 is provided between the guide device 17 and the fixed plate 7 so that the guide device 17 is always operated. A compression spring 39 that is an elastic member biased toward the amateur 15 side and a limiting mechanism 42 that limits the approach of the guide device 17 to the amateur 15 are provided.

  The elastic member is a compression spring 39 provided on the adjustment rod 33 between the inner surface of the support portion 29 of the bracket 24 and the mounting plate 34, and the bracket 24 is fixed to the fixing plate via the bolt 22 and the frame 21. 7, the mounting plate 34, that is, the roller carriage 30 is always biased toward the armature 15.

  As described above, the limiting mechanism 42 of the driving mechanism 18 is coupled to the guide device 17 and has a contact end 38 that is a first end that contacts the armature 15 when the armature 15 is in the braking position of FIG. 4 is an adjustment rod 33 provided with an engagement nut 41 which is a second end engaged with the fixing plate 7 when the amateur 15 is in the release position of FIG.

  In the braking position shown in FIG. 3, the armature 15 and the brake disk 12 are pressed against the fixed plate 7 by the braking spring 2, and a gap G is formed between the brake body 4 and the armature 15. Further, between the frame 21 fixed to the fixing plate 7 and the engaging nut 41 of the adjustment rod 33, for example, an axial gap (brake gap) g1 that is ½ of the axial gap G is formed. There is no gap between the brake pad 13 of the brake disk 12 and the armature 15 and the fixing plate 7 and between the contact end 38 of the adjusting rod 33 and the armature 15. At this time, the roller carriage 30 and the roller 31 are pressed in the axial direction toward the armature 15 by the compression spring 39 that is an elastic member, but are held at the position shown in FIG. 3 by the spring acting force of the brake spring 2.

  When the electromagnetic coil 1 is excited and the armature 15 is attracted against the braking spring 2 to reach the non-braking position (release position) shown in FIG. 4, the gap G between the brake body 4 and the armature 15 becomes zero, The axial interval between the amateur 15 and the fixed plate 7 increases by a distance corresponding to the gap G. For this reason, since the roller carriage 30 is biased toward the armature 15 by the compression spring 39, the roller carriage 30 moves axially to the left in the drawing until the abutting end 38 of the adjusting rod 33 abuts the armature 15. try to. However, when the adjustment rod 33 moves in the axial direction by the gap g1, the engagement nut 41 engages with the frame 21, and the adjustment rod 33 is restricted from further axial movement.

  At this time, the roller carriage 30, that is, the roller 31 moves in the axial direction by the distance g1 between the engagement nut 41 and the frame 21, and the brake disk 12 is directed toward the armature 15 by the distance g1 in the axial direction. And a gap g1 is formed between the brake pad 13 and the fixing plate 7, and a gap g2 (= G−g1) is also formed between the brake pad 13 and the armature 15. Is done. Accordingly, the gap g1 or g2 is surely formed on either side of the fixing plate 7 and the armature 15 of the brake disk 12, and the brake pad 13 rotates while contacting the fixing plate 7 or the armature 15. There is nothing.

  In order to adjust these gaps g1 and g2, the engagement nut 41 can be rotated on the adjustment rod 33 to adjust the gap g1 with the frame 21. When the gap g1 between the engagement nut 41 and the frame 21 is exactly ½ of the gap G between the brake body 4 and the armature 15, g1 = g2.

  Further, when the gap adjusting device 16 is applied to a brake device having a different diameter of the brake disk 12 as shown by a two-dot chain line in FIG. 5, for example, it is necessary to adjust the radial position of the guide device 17 for some reason during operation. When this occurs, the bolt 20 for fastening the frame 21 to the fixing plate 7 is loosened, the frame 21 is shifted in the radial direction along the long hole 19, the position is adjusted, and the bolt 20 is fastened and fixed again. it can.

  Further, since the adjustment rod 33 supporting the bracket 24 and the roller carriage 30 is passed through the long hole 40 formed in the fixing plate 7 and the frame 21, the diameter or position of the brake disc 12 is changed. However, it is possible to absorb a change in the radial position that resists the spring action of the compression spring 23 of the roller 31 or the bracket 24.

As described above, the gap (brake gap) g between the armature 15 or the fixed plate 7 and the brake pad 13 of the brake disk 12 is 0 in order to quickly and easily magnetically attract the armature 15 by the electromagnetic coil 1. Usually it is about 1-0.2mm,
By using the gap adjusting device 16 having the structure as described above, such a small gap can be realized with certainty, and a hoisting machine disc brake device that is fast and reliable and does not drag the brake disc 12 can be obtained. Obtainable.

It is a schematic front view of the hoisting machine disc brake device of this invention. It is a schematic sectional drawing in alignment with line II-II of FIG. It is a schematic sectional drawing which shows the clearance gap adjustment apparatus of FIG. 2 in a braking position. It is a schematic sectional drawing which shows the clearance gap adjustment apparatus of FIG. 3 in a release position. FIG. 5 is an enlarged cross-sectional view of the gap adjusting device along line V-V in FIG. 2.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Electromagnetic coil, 2 Brake spring, 3 Rotating shaft, 4 Brake body, 7 Fixing plate, 12 Brake disc, 15 Amateur, 16 Gap adjustment device, 17 Guide device, 18 Drive mechanism, 24 Bracket, 30 Roller carriage, 31 Roller, 31a Tapered surface, 33 Rod, 38 Abutting end (first end), 39 Elastic member, 41 Engaging nut (second end), 42 Limiting mechanism.

Claims (7)

A brake body having an electromagnetic coil and a braking spring and arranged with respect to the rotation axis;
A fixing plate fixed to the brake body;
A brake disc provided on the rotary shaft between the brake body and the fixed plate, and a non-rotatable and axially slidable brake disc;
Provided between the brake body and the brake disk, and arranged so as to be rotatable and axially movable with respect to a rotating shaft, and when the electromagnetic coil is energized, the brake body is attracted to release the brake disk; An armature that is pressed by the brake spring to brake the brake disk between the fixed plate and the electromagnetic coil to be de-energized,
In a hoisting machine disc brake device comprising a clearance adjusting device that holds the brake disc at a position separated from both the amateur and the fixed plate at the time of braking release,
The gap adjusting device is
A guide device that is held on the fixed plate so as to be movable in the axial direction, and that contacts the brake disc to regulate the axial position of the brake disc;
A hoisting machine disc brake device comprising: a drive mechanism that drives the guide device to a braking position or a non-braking position in accordance with an operation of the amateur.   The guide device is a bracket that is elastically supported so as to be movable in the radial direction with respect to the fixed plate, a roller carriage that is provided so as to be movable in the axial direction with respect to the bracket, and a roller carriage that is rotatably supported by the roller carriage. The hoisting machine disc brake device according to claim 1, further comprising:   The hoisting machine disc brake device according to claim 2, wherein the roller contacts the brake disc from both axial sides.   4. The hoisting machine disc brake device according to claim 2, wherein the roller is a tapered roller that contacts a peripheral corner portion of the brake disc with a tapered surface.   The drive mechanism is provided between the guide device and the fixed plate, and an elastic member that always biases the guide device toward the amateur side, and a limiting mechanism that restricts the approach of the guide device to the amateur. The hoisting machine disc brake device according to any one of claims 1 to 4, wherein the hoisting machine disc brake device is provided.   A first end contacting the armature when the armature is in a braking position, and a second end engaging the fixing plate when the armature is in a release position. The hoisting machine disc brake device according to claim 5, wherein The elastic member of the drive mechanism is provided between the bracket and the roller base;
3. The rod of the limiting mechanism is fixed to the roller base and extends on both sides in the axial direction, and the second end extends through the fixing plate and includes an engagement nut. The hoisting machine disc brake device as described in any one of -6.

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