CN107640715B

CN107640715B - Plate brake of elevator traction machine

Info

Publication number: CN107640715B
Application number: CN201711089448.5A
Authority: CN
Inventors: 王露阳; 孙宇鹏; 方小银; 胡照彬; 李显; 刘杲; 李涛; 张豫宁
Original assignee: Xunda Xuchang driving Technology Co ltd
Current assignee: Xunda Xuchang driving Technology Co ltd
Priority date: 2017-11-08
Filing date: 2017-11-08
Publication date: 2023-05-02
Anticipated expiration: 2037-11-08
Also published as: CN107640715A

Abstract

The invention relates to a plate brake of an elevator traction machine, which comprises a magnetic yoke and an armature, wherein a coil is arranged in the magnetic yoke, a guide hole opposite to the armature is formed in the center of the magnetic yoke, a ball guide sleeve is arranged in the guide hole, a guide post fixedly connected with the armature is fixed on the inner ring of the ball guide sleeve, and a connecting post is arranged in a through hole of the guide post; the magnetic yoke is provided with a limiting pin and a limiting hole matched with the limiting pin is formed in the armature to prevent the armature from rotating, or the magnetic yoke is provided with a limiting pin and a limiting hole matched with the limiting pin to prevent the armature from rotating. According to the invention, the ball guide sleeve and the guide post are adopted as the guide structures between the magnetic yoke and the armature, so that the armature can not incline when the armature moves relative to the magnetic yoke in the braking process, and the gap between the armature and the magnetic yoke is uniform, so that the air gap of the brake is uniform in the braking process, the alarm fault of the micro switch can not be caused by the uneven air gap, the braking is reliable, and the safety is high.

Description

Plate brake of elevator traction machine

Technical Field

The invention relates to a braking technology of an elevator traction machine, in particular to a plate brake of the elevator traction machine.

Background

The plate brake is one of the most widely applied brakes in the permanent magnet synchronous traction machine, the brake has the common problem that the air gaps at four corners of the brake are uneven, and the uneven air gaps can cause the alarm fault of the micro switch contact on the brake to cause the elevator to be closed. The main reason for the change of the air gap of the plate brake is that the fit clearance of the guide structure between the magnetic yoke and the armature is too large, so that the change of the air gap can be caused, and the too small fit clearance of the guide structure can cause movement blocking of the brake. The electromagnetic brake disclosed in the Chinese patent document with the publication number of CN103613037A belongs to a plate brake, in the electromagnetic brake disclosed in the publication, a magnet yoke and a magnet are limited and guided through a mounting bolt and fixedly connected through a connecting bolt, the guide fit clearance of the mounting bolt and the connecting bolt is large, and the air gap variation is easy to cause uneven air gaps at four corners of a system.

Disclosure of Invention

The invention aims to provide a plate brake of an elevator traction machine, which is used for solving the problem of uneven air gap of the existing plate brake.

In order to solve the problems, the invention provides a plate brake of an elevator traction machine, which comprises a magnetic yoke and an armature, wherein a coil is arranged in the magnetic yoke, a guide hole opposite to the armature is formed in the center of the magnetic yoke, a ball guide sleeve is arranged in the guide hole, a guide pillar fixedly connected with the armature is fixed on the inner ring of the ball guide sleeve, and a connecting column is arranged in a through hole of the guide pillar; the magnetic yoke is provided with a limiting pin and a limiting hole matched with the limiting pin is formed in the armature to prevent the armature from rotating, or the magnetic yoke is provided with a limiting pin and a limiting hole matched with the limiting pin to prevent the armature from rotating; the periphery of the magnetic yoke and the periphery of the armature are connected through a fixing bolt so as to prevent the armature from being separated from the magnetic yoke when moving relative to the magnetic yoke.

The plate brake of the elevator traction machine provided by the invention also has the following technical characteristics:

further, a limiting ring is further arranged at the end part of the guide post.

Further, a feeler lever is fixed on the armature, a rotatable shifting block and a micro switch are hinged and fixed on the magnetic yoke, and when the feeler lever moves towards the magnetic yoke along with the armature, the feeler lever can trigger the micro switch through the shifting block.

Further, the feeler lever is a bolt.

Further, the shifting block comprises a driving arm and a triggering arm, the length of the driving arm is smaller than that of the triggering arm, the feeler lever is arranged corresponding to the end part of the driving arm, and the contact of the micro switch is arranged corresponding to the end part of the triggering arm.

Further, the ball guide sleeve comprises a steel sleeve and an inner ring, the inner ring is a copper sleeve embedded with steel balls, the steel sleeve is in interference fit with the guide hole, and the guide post is in interference fit with the inner ring.

The invention has the following beneficial effects: the center of the magnetic yoke is provided with the guide hole, the ball guide sleeve and the guide pillar are adopted as the guide structure between the magnetic yoke and the armature, the armature can not incline when the armature moves relative to the magnetic yoke in the braking process by adopting the center guide structure, and the gap between the armature and the magnetic yoke is uniform, so that the air gap of the brake is uniform in the braking process, the alarm fault of the micro switch can not be caused by the uneven air gap, the braking is reliable, and the safety is high; the ball guide sleeve is used as a guide device, so that the machining precision of the brake can be reduced, the interchangeability is good, and the maintenance is convenient.

Drawings

Fig. 1 is a schematic structural view of a plate brake of an elevator traction machine according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

fig. 3 is a schematic structural view of a ball guide sleeve and a guide post according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a ball guide sleeve according to an embodiment of the present invention;

fig. 5 is a sectional view in the direction B-B of fig. 1.

Detailed Description

The invention will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

In one embodiment of the plate brake of the elevator traction machine of the present invention as shown in fig. 1 to 5, the plate brake of the elevator traction machine comprises a yoke 10 and an armature 20, a coil 11 is arranged in the yoke 10, a guide hole opposite to the armature 20 is arranged in the center of the yoke 10, a ball guide sleeve 30 is installed in the guide hole, a guide post 40 fixedly connected with the armature 20 is fixed on an inner ring 31 of the ball guide sleeve 30, and a connecting post 50 is arranged in a through hole of the guide post 40; the magnetic yoke 10 is provided with a limiting pin 12, the armature 20 is provided with a limiting hole 21 matched with the limiting pin 12 to prevent the armature 20 from rotating, and the periphery of the magnetic yoke 10 and the periphery of the armature 20 are connected through a fixing bolt 101 to prevent the armature from being separated from the magnetic yoke when moving relative to the magnetic yoke. Of course, a limit pin may be provided on the armature, and a limit hole may be provided on the yoke. According to the plate brake of the elevator traction machine, the guide hole is formed in the center of the magnetic yoke, the ball guide sleeve and the guide pillar are adopted as the guide structure between the magnetic yoke and the armature, the armature can not incline when the armature moves relative to the magnetic yoke in the braking process, the gap between the armature and the magnetic yoke is uniform, and the gap between the periphery of the armature and the periphery of the magnetic yoke is the same in the moving process of the armature relative to the magnetic yoke, so that the brake is uniform in air gap in the braking process, micro switch alarm faults caused by non-uniformity of the air gap can be avoided, and the brake is reliable and high in safety; the ball guide sleeve is used as a guide device, so that the machining precision of the brake can be reduced, the interchangeability is good, and the maintenance is convenient.

In the above embodiment, the plate brake of the elevator traction machine further has the following technical features: preferably, the end of the guide post 40 is further provided with a stop collar 41, one side of the stop collar 41 abuts against the surface of the armature 20, and the other side of the stop collar 41 is used for being matched with the brake spring 22. Preferably, the armature 20 is also fixed with a contact rod 23, the yoke 10 is hinged with a rotatable shifting block 13 and a micro switch 14, and when the contact rod 23 moves towards the yoke 10 along with the armature 20, the contact rod 23 can trigger the micro switch 14 through the shifting block 13. Preferably, the feeler lever 23 is a bolt for easy adjustment. It will be appreciated that, as shown in fig. 1, a brake pad is fixed on the lower side of the armature 20, and the brake pad is fixedly connected to the armature 20 and moves up and down along with the armature, a friction plate is fixed on the lower side of the brake pad, and the friction plate is separated from or contacted with a brake wheel of the traction machine when the brake pad moves up and down along with the armature, wherein the brake pad, the friction plate and the braking process are conventional technologies in the art, and will not be repeated herein.

Preferably, the dial 13 includes a driving arm 131 and a trigger arm 132, the length of the driving arm 131 is smaller than that of the trigger arm 132, the feeler lever 23 is disposed corresponding to an end of the driving arm 131, and the contact of the micro switch 14 is disposed corresponding to an end of the trigger arm 132. Preferably, the ball guide sleeve 30 comprises a steel sleeve 32 and an inner ring 31, the inner ring 31 is a copper sleeve embedded with steel balls 33, the steel sleeve 32 is in interference fit with the guide hole, the guide post 40 is in interference fit with the inner ring 31, the plate brake can maintain good guiding performance while reducing the processing precision requirements of the guide hole and the guide post on the magnetic yoke by adopting the guide structure of the ball guide sleeve and the guide post, and the ball guide sleeve has good interchangeability and is convenient to assemble and replace.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The plate brake of the elevator traction machine comprises a magnetic yoke and an armature, wherein a coil is arranged in the magnetic yoke, and the plate brake is characterized in that a guide hole opposite to the armature is formed in the center of the magnetic yoke, a ball guide sleeve is arranged in the guide hole, a guide pillar fixedly connected with the armature is fixed on the inner ring of the ball guide sleeve, and a connecting column is arranged in a through hole of the guide pillar; the magnetic yoke is provided with a limiting pin and a limiting hole matched with the limiting pin is formed in the armature to prevent the armature from rotating, or the magnetic yoke is provided with a limiting pin and a limiting hole matched with the limiting pin to prevent the armature from rotating; the periphery of the magnetic yoke and the periphery of the armature are connected through a fixing bolt so as to prevent the armature from being separated from the magnetic yoke when moving relative to the magnetic yoke.

2. The plate brake of the elevator traction machine according to claim 1, characterized in that: and a limiting ring is further arranged at the end part of the guide post.

3. The plate brake of the elevator traction machine according to claim 1, characterized in that: and the contact rod is further fixed on the armature, a rotatable shifting block and a micro switch are hinged and fixed on the magnetic yoke, and when the contact rod moves towards the magnetic yoke along with the armature, the contact rod can trigger the micro switch through the shifting block.

4. The plate brake of the elevator traction machine according to claim 3, characterized in that: the feeler lever is a bolt.

5. The plate brake of the elevator traction machine according to claim 3, wherein the dial block includes a driving arm and a trigger arm, the driving arm has a length smaller than that of the trigger arm, the feeler lever is disposed corresponding to an end of the driving arm, and the contact of the micro switch is disposed corresponding to an end of the trigger arm.

6. The plate brake of the elevator traction machine according to claim 1, characterized in that: the ball guide sleeve comprises a steel sleeve and an inner ring, the inner ring is a copper sleeve embedded with steel balls, the steel sleeve is in interference fit with the guide hole, and the guide post is in interference fit with the inner ring.