JP2014020469A - Brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake device capable of preventing a brake disc part from lightly contacting other members by suspension even in a constitution where a rotation shaft extends in a vertical direction, and capable of preventing a product life from shortening.SOLUTION: A support body 8 comprising a base part 4a and an elastic member 9 is arranged below a brake disc part 2. When an armature 5 is removed from a side plate 4, the support body 8 supports the lower surface of the brake disc part 2 at a position higher than the upper surface of the side plate 4, and forms a gap 8a between the lower surface of the brake disc part 2 and the upper surface of the side plate 4.

Description

  The present invention relates to a brake device that restricts rotation of a rotating shaft.

  As this type of brake device conventionally used, for example, configurations shown in the following Patent Documents 1 and 2 can be exemplified. FIG. 5 is a block diagram showing a conventional brake device. For example, the rotary shaft 1 such as an AC servomotor extends along the horizontal direction 1b. A brake disc 21 is fixed to the outer periphery of the rotating shaft 1 via a hub 20.

  Side plates 4 and armatures 5 are arranged on both sides of the brake disc 21. The side plate 4 is connected to the core 7 via screws 6. A collar 6 a is attached to the outer periphery of the screw 6. The screw 6 and the collar 6 a are passed through holes provided in the armature 5. The armature 5 is guided by the screw 6 so as to be displaceable in a direction approaching the brake disc portion 2 and a direction away from the brake disc portion 2.

  In the core 7, a spring 7a and an exciting coil 7b are embedded. The spring 7 a constantly biases the armature 5 toward the side plate 4. The excitation coil 7b urges the armature 5 in a direction to pull it away from the side plate 4 with a force larger than the spring force of the spring 7a when excited by a current supplied from the outside. In a state where the exciting coil 7b is excited and the armature 5 is separated from the side plate 4 by the action of the exciting coil 7b, the brake disk 21 is released and the rotation of the rotating shaft 1 is allowed. On the other hand, in a state where the exciting coil 7b is not excited and the armature 5 is displaced toward the side plate 4 by the action of the spring 7a, the brake disk 21 is sandwiched between the armature 5 and the side plate 4 and rotated. The rotation of the shaft 1 is limited.

JP 2007-192305 A JP 2009-092094 A

  The conventional brake device as described above is basically used in a configuration in which the rotating shaft 1 extends along the horizontal direction 1b. When such a conventional device is applied to a configuration in which the rotary shaft 1 extends along the vertical direction, the brake disk 21 is suspended by its own weight, and the side plate 4 or the armature 5 positioned below the brake disk 21 The brake disc 21 may come into light contact. If the rotating shaft 1 continues to rotate while the brake disc 21 is in light contact with the side plate 4 or the armature 5, the brake disc 21 and the like will be worn out and the product life will be shortened.

  The present invention has been made in order to solve the above-described problems. The purpose of the present invention is to make the brake disc portion lightly contact with other members by drooping even in a configuration in which the rotation shaft extends along the vertical direction. It is an object of the present invention to provide a brake device that can prevent the product from being used and prevent the product life from being shortened.

  The brake device according to the present invention includes a brake disc portion that is fixed to the outer periphery of a rotating shaft that extends along the vertical direction and extends along the horizontal direction, and an upper holding member that is disposed above the brake disc portion. A brake between the upper clamping member and the lower clamping member by displacing the member, the lower clamping member disposed below the brake disc portion, and either one of the upper and lower clamping members toward the other. A brake control unit that allows the rotation of the rotating shaft by releasing the brake disk part by separating one from the other while restricting the rotation of the rotating shaft by sandwiching the disk part, and when one is separated from the other The lower surface of the brake disc portion is supported at a position higher than the upper surface of the lower clamping member, and a gap is formed between the lower surface of the brake disc portion and the upper surface of the lower clamping member. And a lifting member.

  According to the brake device of the present invention, when one of the upper and lower clamping members is pulled away from the other, the lower surface of the brake disc portion is supported at a position higher than the upper surface of the lower clamping member, and the brake disc portion Since a support body that forms a gap between the lower surface of the lower clamping member and the upper surface of the lower clamping member is provided, the brake disc portion is suspended from the other members even when the rotation axis extends along the vertical direction. Light contact can be avoided and product life can be prevented from being shortened.

It is a block diagram which shows the brake device by Embodiment 1 of this invention. It is explanatory drawing which shows the state in which the exciting coil of FIG. 1 is not excited. It is a block diagram which shows the brake device by Embodiment 2 of this invention. It is explanatory drawing which shows the state in which the exciting coil of FIG. 3 is not excited. It is a block diagram which shows the conventional brake device.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a configuration diagram showing a brake device according to Embodiment 1 of the present invention, and FIG. 2 is an explanatory diagram showing a state where the exciting coil 7b of FIG. 1 is not excited. As shown in FIG. 1, a rotating shaft 1 such as an AC servomotor extends along the vertical direction 1a. A brake disc 21 is attached to the outer periphery of the rotary shaft 1 via a hub 20. The hub 20 is constituted by a cylindrical member having a flange 20 a and is shrink-fitted on the rotary shaft 1. The brake disc 21 is a ring-shaped member that extends radially from the tip of the flange 20a. The flange 20a and the brake disc 21 constitute a brake disc portion 2 extending along the horizontal direction 1b (radial direction).

  A side plate 4 is disposed below the brake disc portion 2, and an armature 5 is disposed above the brake disc portion 2. The side plate 4 and the armature 5 are disposed to face each other with the brake disk portion 2 interposed therebetween. In the first embodiment, the side plate 4 constitutes the lower clamping member, and the armature 5 constitutes the upper clamping member.

  The side plate 4 is fixed to the rotating shaft 1 through the base 4a. The base portion 4 a is a disk-like member fixed to the outer periphery of the rotary shaft 1 via the hub 20 below the brake disc portion 2.

  The side plate 4 is connected to the core 7 via screws 6. A collar 6 a is attached to the outer periphery of the screw 6. The screw 6 and the collar 6 a are passed through holes provided in the armature 5. The armature 5 is guided by the screw 6 so as to be displaceable in a direction approaching the brake disc portion 2 and a direction away from the brake disc portion 2.

  In the core 7, a spring 7a and an exciting coil 7b constituting a braking control unit are embedded. The spring 7 a constantly biases the armature 5 toward the side plate 4. The excitation coil 7b urges the armature 5 in a direction to pull it away from the side plate 4 with a force larger than the spring force of the spring 7a when excited by a current supplied from the outside.

  FIG. 1 shows a state where the exciting coil 7b is excited and the armature 5 is separated from the side plate 4 by the action of the exciting coil 7b. In this state, the brake disc 21 is released and the rotation of the rotating shaft 1 is allowed. On the other hand, FIG. 2 shows a state in which the exciting coil 7b is not excited and the armature 5 is displaced toward the side plate 4 by the action of the spring 7a. In this state, the brake disc 21 is sandwiched between the armature 5 and the side plate 4 and the rotation of the rotary shaft 1 is restricted.

  Below the brake disk portion 2, when the armature 5 is pulled away from the side plate 4 as shown in FIG. 1, the lower surface of the brake disk portion 2 is supported at a position higher than the upper surface of the side plate 4. A support 8 that forms a gap 8 a is provided between the lower surface of the portion 2 and the upper surface of the side plate 4. Since the gap 8a is formed by the support 8, it is possible to avoid the brake disc portion 2 from being in light contact with the side plate 4 and to prevent the product life from being shortened.

  In the present embodiment, the support 8 is composed of a base 4 a and an elastic member 9. As described above, the base portion 4a is a disk-like member fixed to the outer periphery of the rotary shaft 1 via the hub 20 below the brake disc portion 2. The elastic member 9 is disposed between the base portion 4a and the lower surface of the brake disc portion 2, and urges the brake disc portion 2 upward, and the armature 5 faces the side plate 4 as shown in FIG. It is compressed when displaced and allows downward displacement (bending) of the brake disk portion 2. That is, the spring force of the elastic member 9 is set to be sufficiently smaller than the spring force of the spring 7 a that biases the armature 5 toward the side plate 4. The elastic member 9 can be constituted by a wave washer that is curved so as to wave in the thickness direction as shown in the figure.

  Above the brake disk portion 2, a ring-shaped plate 10 is provided that is fixed to the outer periphery of the rotating shaft 1 and is disposed in contact with the upper surface of the brake disk portion 2. The plate 10 opposes the force of the elastic member 9 and restricts the upward displacement (deflection) of the brake disc portion 2 to determine the position of the brake disc portion 2 between the side plate 4 and the armature 5. ing.

  In such a brake device, when the armature 5 is pulled away from the side plate 4, the lower surface of the brake disc portion 2 is supported at a position higher than the upper surface of the side plate 4, and the lower surface of the brake disc portion 2 and the side plate 4 is provided with a support 8 that forms a gap 8a with respect to the upper surface of the brake 4. Therefore, even if the rotary shaft 1 extends along the vertical direction 1a, the brake disk portion 2 is suspended to another member (side The light contact with the plate 4) can be avoided, and the product life can be prevented from being shortened.

  The support 8 is disposed between the base 4a fixed to the outer periphery of the rotary shaft 1 below the brake disc portion 2 and between the base 4a and the brake disc portion 2, and biases the brake disc portion 2 upward. In addition, since the armature 5 is composed of an elastic member 9 that is compressed when the armature 5 is displaced toward the side plate 4 and allows the brake disc portion 2 to be displaced downward, the armature 5 is configured to be the brake disc portion 2. Even in the configuration in which the side plate 4 is disposed below the brake disc portion 2, it is possible to avoid the brake operation from being hindered by the support body 8 and to improve the reliability of the brake operation.

  Further, since the elastic member 9 is constituted by a wave washer that is curved so as to wave in the thickness direction, the brake disk portion 2 is urged upward and the armature 5 is displaced toward the side plate 4. Thus, it is possible to realize a configuration that is compressed when allowed and allows a downward displacement of the brake disk portion 2 more easily and reliably.

Embodiment 2. FIG.
FIG. 3 is a block diagram showing a brake device according to Embodiment 2 of the present invention, and FIG. 4 is an explanatory diagram showing a state where the exciting coil 7b of FIG. 3 is not excited. The configuration of the second embodiment shown in FIGS. 3 and 4 is a configuration that is inverted from the configuration of the first embodiment. That is, in the second embodiment, the armature 5 is disposed below the brake disc portion 2 and the side plate 4 is disposed above the brake disc portion 2. Therefore, in the second embodiment, the armature 5 constitutes the lower clamping member, and the side plate 4 constitutes the upper clamping member.

  The plate 10 is fixed to the outer periphery of the rotary shaft 1 and is disposed in contact with the lower surface of the brake disc portion 2. That is, in the second embodiment, the support body 8 is constituted by the plate 10, and the lower surface of the brake disc portion 2 is supported by the plate 10 at a position higher than the upper surface of the armature 5, thereby the lower surface of the brake disc portion 2. And a gap 8 a is formed between the upper surface of the brake disc portion 2 and the upper surface of the brake disc portion 2. The gap 8a prevents the brake disc portion 2 from being in light contact with the armature 5 and prevents the product life from being shortened. Other configurations are the same as those in the first embodiment.

  In such a brake device, the support body 8 is constituted by the plate 10 that is fixed to the outer periphery of the rotating shaft 1 and is in contact with the lower surface of the brake disc portion 2, so that the armature 5 is located below the brake disc portion 2. Even in the configuration in which the side plate 4 is disposed above the brake disk portion 2, the gap 8 a can be reliably formed. Thereby, it can avoid that the brake disc part 2 contacts lightly with the armature 5, and it can prevent that a product lifetime becomes short.

Note that, as shown in the first and second embodiments, the common configuration shown in FIGS. 1 to 4 allows light contact with the brake disk portion 2 and members disposed below it regardless of the orientation of the top and bottom. You can see that it can be prevented.
That is, the brake disc portion 2 fixed to the outer periphery of the rotary shaft 1 and extended along the radial direction of the rotary shaft 1, the side plate 4 and the armature arranged to face each other with the brake disc portion 2 interposed therebetween 5 and displacing the armature 5 toward the side plate 4 to sandwich the brake disk portion 2 between the armature 5 and the side plate 4 to restrict the rotation of the rotary shaft 1 and to remove the armature 5 from the side plate 4. A brake control unit (spring 7a and excitation coil 7b) that releases the brake disk unit 2 by allowing it to be separated and allows the rotation of the rotary shaft 1 is fixed to the outer periphery of the rotary shaft 1 on the side plate 4 side of the brake disk unit 2 Arranged between the base 4a and the base 4a and the brake disc portion 2, the brake disc portion 2 being An elastic member 9 that biases the armature 5 and is compressed when the armature 5 is displaced toward the side plate 4 to allow the brake disk portion 2 to be displaced toward the side plate 4, and the rotating shaft 1. The brake disk portion 2 and its lower part are fixed to the armature 5 and provided with a plate 10 disposed in contact with the end surface of the brake disk portion 2 on the armature 5 side, regardless of the vertical direction. The light contact with the member arrange | positioned to can be prevented, and it can prevent that a product lifetime becomes short.

  In Embodiments 1 and 2, it has been described that the elastic member 9 is configured by a wave washer, but may be configured by another elastic member such as a coil spring.

DESCRIPTION OF SYMBOLS 1 Rotating shaft 1a Vertical direction 1b Horizontal direction 2 Brake disk part 4 Side plate (Upper side clamping member or lower side clamping member)
4a Base 5 Armature (upper clamping member or lower clamping member)
7a Spring (braking control part)
7b Excitation coil (braking control unit)
8 Support 8a Clearance 9 Elastic member 10 Plate

Claims (5)

A brake disc portion fixed to the outer periphery of the rotating shaft extending along the vertical direction and extending along the horizontal direction;
An upper clamping member disposed above the brake disc portion;
A lower clamping member disposed below the brake disc portion;
By displacing one of the upper and lower clamping members toward the other, the brake disk portion is sandwiched between the upper clamping member and the lower clamping member to restrict the rotation of the rotating shaft. A brake control unit that releases the brake disc unit by allowing the one side to be separated from the other and allows the rotation of the rotary shaft;
When the one is separated from the other, the lower surface of the brake disk portion is supported at a position higher than the upper surface of the lower holding member, and the lower surface of the brake disk portion and the upper surface of the lower holding member are And a support body that forms a gap between the brake devices. The upper clamping member is biased toward the lower clamping member when the rotation of the rotating shaft is restricted,
The support is
A base portion fixed to the outer periphery of the rotating shaft below the brake disc portion;
The brake disc is disposed between the base portion and the brake disc portion, biases the brake disc portion upward, and is compressed when the upper clamping member is displaced toward the lower clamping member. The brake device according to claim 1, further comprising: an elastic member that allows a downward displacement of the portion.   The brake device according to claim 2, wherein the elastic member is a wave washer that is curved so as to wave in the thickness direction. When the rotation of the rotating shaft is braked, the lower holding member is biased toward the upper holding member,
The brake device according to claim 1, wherein the support is a plate that is fixed to an outer periphery of the rotating shaft and is disposed in contact with a lower surface of the brake disk portion. A brake disc portion fixed to the outer periphery of the rotating shaft and extending along the radial direction of the rotating shaft;
A side plate and an armature arranged to face each other across the brake disc part,
By displacing the armature toward the side plate, the brake disc portion is sandwiched between the armature and the side plate to limit the rotation of the rotating shaft, and the armature is pulled away from the side plate. A braking control unit that releases the brake disc unit and allows rotation of the rotating shaft;
A base portion fixed to the outer periphery of the rotating shaft on the side plate side than the brake disc portion;
It is arranged between the base part and the brake disk part, and urges the brake disk part to the armature side, and is compressed when the armature is displaced toward the side plate and An elastic member that allows displacement toward the side plate;
A brake device comprising: a plate fixed to an outer periphery of the rotating shaft and disposed in contact with an end surface of the brake disc portion on the armature side.

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