JP2015021529A - Electromagnetic brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic brake device capable of stabilizing an operation of the electromagnetic brake device.SOLUTION: An electromagnetic brake device includes: a brake shoe capable of sliding against a braking surface; an armature for supporting the brake shoe; a brake spring for pressing the armature and energizing the brake shoe in a braking direction; and an electromagnetic magnet for sucking the armature against an energization force of the brake spring and separating the brake shoe from the braking surface. The electromagnetic brake device includes: a stepped bolt detachably fixed on a brake shoe side end part of the electromagnetic magnet; and an elastic body provided between the stepped bolt and the armature.

Description

  The present invention relates to an electromagnetic brake device.

  Conventionally, a brake shoe that is slidable on the braking surface, an amateur that supports the brake shoe, a braking spring that presses the armature to bias the brake shoe in the braking direction, and the armature resists the biasing force of the braking spring. There is an electromagnetic brake device that includes an electromagnetic magnet that attracts the brake shoe and separates the brake shoe from the braking surface.

  For example, in Patent Document 1, a rubber ring (elastic body) is fitted in a groove near the tip of a guide pin fixed to an electromagnetic magnet so that the armature is slid and guided along the outer periphery of the elastic body. A brake device is disclosed. According to this electromagnetic brake device, the movement of the amateur is slowed down by the holding force of the elastic body so as to achieve a quiet operation.

International Publication No. 2011-004543

  However, in the electromagnetic brake device described in Patent Document 1, when the holding force of the elastic body in the amateur operation direction is set for the purpose of achieving both the dynamic performance of the electromagnetic brake device and the quiet operation, the amateur operation direction However, the holding force of the elastic body in the vertical direction is insufficient. In this case, when the amateur operates on the magnetic pole surface of the electromagnetic magnet, a collapse occurs, causing a problem that the operation of the amateur becomes unstable.

  When the shearing force generated by the deformation of the elastic body exceeds the frictional force between the amateur and the elastic body, the amateur and the elastic body slide and slide. In this case, there arises a problem that the elastic body is worn. Therefore, the operation of the amateur becomes unstable and the elastic body may be worn out. As a result, there arises a problem that the operation of the electromagnetic brake device becomes unstable.

  The present invention has been made in consideration of the above points, and proposes an electromagnetic brake device capable of stabilizing the operation of the electromagnetic brake device.

  In order to solve such a problem, an electromagnetic brake device according to the present invention includes a brake shoe that is slidable on a braking surface, an amateur that supports the brake shoe, and a brake that presses the amateur and biases the brake shoe in the braking direction. In an electromagnetic brake device equipped with an electromagnetic magnet that attracts the spring and armature against the biasing force of the braking spring and separates the brake shoe from the braking surface, it can be attached and detached so that it protrudes to the brake shoe side end of the electromagnetic magnet A stepped bolt fixed to the armature, and an elastic body provided at a protruding portion of the stepped bolt on the brake shoe side of the amateur.

  According to the present invention, the operation of the electromagnetic brake device can be stabilized.

It is a whole block diagram of the electromagnetic brake device in this Embodiment. It is a section lineblock diagram of an elastic body. It is a perspective view of an elastic body. It is a block diagram which shows the connection relationship of a stepped volt | bolt and an elastic body. It is a block diagram which shows the connection state of a stepped volt | bolt and an elastic body. It is a block diagram which shows the connection relationship of the stepped volt | bolt and elastic body of other embodiment. It is a block diagram which shows the connection state of a stepped volt | bolt and an elastic body.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an overall configuration of an electromagnetic brake device 1 according to the present embodiment.
The electromagnetic brake device 1 is a device provided to brake, for example, an elevator lifting body, and includes a brake shoe 2, an armature 3, a braking spring 4, an electromagnetic coil 5, an electromagnetic magnet 6, a stepped bolt 7 and an elastic body 8. Composed.

  The brake shoe 2 is a member that can be slidably contacted with a braking surface of a drum (not shown), and the amateur 3 is a member for supporting the brake shoe 2. The brake spring 4 is a member that presses the armature 3 and biases the brake shoe 2 in the braking direction. The electromagnetic coil 5 and the electromagnetic magnet 6 oppose the armature 3 against the biasing force of the brake spring 4. This is a member for sucking in the suction direction and separating the brake shoe 2 from the braking surface.

  Furthermore, the electromagnetic brake device 1 according to the present embodiment is devised to make the operation of the armature 3 quiet and stable. Specifically, the electromagnetic brake device 1 protrudes from the end of the electromagnetic magnet 6 on the brake shoe 2 side. A stepped bolt 7 that is detachably fixed and an elastic body 8 provided on the protruding portion of the stepped bolt 7 on the brake shoe 2 side of the armature 3, and is elastic in the gap between the stepped bolt 7 and the armature 3. A body 8 is provided.

FIG. 2A shows a cross-sectional configuration of the elastic body 8. FIG. 2B shows a perspective configuration of the elastic body 8.
The elastic body 8 elastically connects the cylindrical inner cylinder member 11, the outer cylinder member 12 surrounding the inner cylinder member 11 at a position spaced in the radial direction, and the inner cylinder member 11 and the outer cylinder member 12 in the radial direction. The rubber elastic body 13 is vulcanized and bonded together in a state, and the elastic constant of the rubber elastic body 13 is higher in the radial direction than in the axial direction.

  FIG. 3 shows the connection relationship between the stepped bolt 7 and the elastic body 8. FIG. 4 shows a connection state of the stepped bolt 7 and the elastic body 8. The stepped bolt 7 is inserted into a counterbore 14 provided in the armature 3 together with the collars 9 and 10 and the elastic body 8, and the screw portion 17 at the tip is screwed into the screw hole of the electromagnetic magnet 6 and fixed. Have.

  The outer diameter portion 15 of the stepped bolt 7 and the inner diameter surface of the inner cylinder member 11 are formed so as to have a small fit. Similarly, the inner diameter surface of the counterbore 14 and the outer diameter surface of the outer cylinder member 12 are formed to have a small fit. The elastic body 8 has a structure in which the spring constant in the radial direction is higher than the spring constant in the axial direction and has a small play in the inner and outer diameters, so that the armature 3 tilts against the magnetic pole face 16 of the electromagnetic magnet 6 when the armature 3 is operated. And the operation of the amateur 3 can be stabilized.

  The collar 9 has a structure that contacts the inner cylinder member 11 of the elastic body 8 and does not contact the outer cylinder member 12. On the other hand, the collar 10 has a structure that contacts the outer cylinder member 12 of the elastic body 8 and does not contact the inner cylinder member 11. By adjusting the thickness of the collars 9 and 10 by such a structure of the collars 9 and 10, the brake shoe 2 is attracted (the armature 3 is attracted to the electromagnetic magnet 6) and brakes (the armature 3 and the brake). It is possible to freely adjust the shearing force of rubber (the holding force of the armature 3 of the elastic body 8) generated in the elastic body 8 in a state where the shoe 2 is pressed against the braking surface.

  In the electromagnetic brake device 1, the load relationship varies within the allowable range in terms of operation performance due to the tolerance of the spring constant of the brake spring 4 and the dimensional tolerance of the parts. There is a case. Therefore, according to the present embodiment, it is possible to adjust the thickness of only the collars 9 and 10 to make the operation sound quieter in accordance with the individual ability of the electromagnetic brake device 1.

  As described above, according to the present embodiment, the stepped bolt 7 is detachably fixed to the electromagnetic magnet 6, and the elastic body 8 is provided between the stepped bolt 7 and the armature 3. While achieving both the dynamic performance of the electromagnetic brake device 1 and the quiet operation, it is possible to stabilize the operation of the armature 3 and realize a structure in which the elastic body 8 itself does not wear. . Further, by adjusting the thicknesses of the collars 9 and 10, the holding force of the armature 3 of the elastic body 8 can be adjusted, and noise reduction can be realized.

  When the dimension of the threaded portion 17 of the stepped bolt 7 becomes extremely small due to dimensional constraints, and there are concerns in terms of strength and workability, the following forms shown in FIGS. 5 and 6 can be adopted.

  FIG. 5 shows a connection relationship between the stepped bolt 18 and the elastic body 8 in another embodiment. FIG. 6 shows a connection state of the stepped bolt 18 and the elastic body 8. In other embodiments shown in FIGS. 5 and 6, a stepped bolt 7 that is detachably fixed so as to protrude from the brake shoe 2 side end portion of the electromagnetic magnet 6 and a stepped bolt on the brake shoe 2 side of the armature 3. A hole provided in the electromagnetic magnet 6 in place of the stepped bolt 7 provided with an elastic body 8 provided on the protruding portion 7 and detachably fixed to the brake shoe 2 side end of the electromagnetic magnet 6 in FIG. 21 and a stepped bolt 18 having a diameter slightly smaller than the inner diameter of the hole 21 are used.

  The stepped bolt 18 is inserted from the end of the electromagnetic magnet 6 opposite to the brake shoe 2, the screw portion 20 is screwed into the screw hole 22 of the electromagnetic magnet 6, and the tip portion is the brake shoe 2 side end. It has a structure protruding to the part. The structure in which the collars 9 and 10 and the elastic body 8 are inserted into the counterbore 14 provided in the amateur 3 is the same as the structure shown in FIG. On the other hand, it is different from the structure shown in FIG. 1 in that the collars 9 and 10 and the elastic body 8 are fixed by a fixing nut 19. In this case, the outer diameter of the screw portion 20 can be relatively easily ensured as compared with FIG.

DESCRIPTION OF SYMBOLS 1 Electromagnetic brake device 2 Brake shoe 3 Amateur 4 Brake spring 5 Electromagnetic coil 6 Electromagnetic magnet 7 Stepped bolt 8 Elastic body 9 Small color 10 Large color 11 Inner cylinder member 12 Outer cylinder member 13 Cylindrical rubber elastic body 14 Counterbore 15 Contact portion of inner bolt of stepped bolt 16 Magnetic magnet pole face 17 Screwed portion of stepped bolt 18 Stepped bolt 19 Fixing nut 20 Screwed portion of stepped bolt 21 Electromagnetic magnet hole 22 Electromagnetic magnet threaded portion

Claims (5)

A brake shoe slidably contactable with a braking surface, an amateur supporting the brake shoe, a braking spring that presses the armature and biases the brake shoe in a braking direction, and the armature is used as a biasing force of the braking spring. In an electromagnetic brake device comprising an electromagnetic magnet that attracts and resists the brake shoe from the braking surface,
A stepped bolt that is detachably fixed so as to protrude from the brake shoe side end of the electromagnetic magnet;
An electromagnetic brake device comprising: an elastic body provided at a protruding portion of the stepped bolt on the brake shoe side of the amateur. The elastic body is
A cylindrical inner cylinder member;
An outer cylinder member surrounding the inner cylinder member at positions spaced apart in the radial direction;
The electromagnetic brake device according to claim 1, further comprising: a cylindrical rubber elastic body that elastically connects the inner cylinder member and the outer cylinder member in a radial direction. The elastic body is
Formed so that the inner diameter surface of the inner cylinder member and the outer diameter surface of the stepped bolt are fitted,
Formed so that the outer diameter surface of the outer cylinder member and the inner diameter surface of the counterbore formed in the armature for inserting the stepped bolt are fitted,
The rubber elastic body is
The electromagnetic brake device according to claim 2, wherein the radial spring constant is higher than the axial spring constant. The amateur is
A counterbore for inserting the stepped bolt is formed,
The electromagnetic magnet is
A screw hole for fixing the threaded portion of the stepped bolt is formed,
The step bolt is
The first collar, the elastic body, and the second collar are inserted into the counterbore, and the screw portion is screwed into the screw hole to be fixed to the electromagnetic magnet. The electromagnetic brake device described. The first color is
Formed so as not to contact the outer cylinder member while contacting the inner cylinder member,
The second color is
The electromagnetic brake device according to claim 4, wherein the electromagnetic brake device is formed so as to contact the outer cylinder member but not to contact the inner cylinder member.

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