CN107055365B

CN107055365B - Plate brake

Info

Publication number: CN107055365B
Application number: CN201710103506.9A
Authority: CN
Inventors: 肖佳锋; 崔志均; 徐杨
Original assignee: Hitachi Elevator Motor Guangzhou Co Ltd
Current assignee: Hitachi Elevator Motor Guangzhou Co Ltd
Priority date: 2017-02-24
Filing date: 2017-02-24
Publication date: 2022-12-13
Anticipated expiration: 2037-02-24
Also published as: CN107055365A

Abstract

The invention relates to a plate brake, which comprises an electromagnetic iron core, a supporting block, a brake spring, a brake block, an armature and a guide post, wherein the electromagnetic iron core is fixed on the supporting block, the electromagnetic iron core is provided with an electromagnetic coil, one end of the brake spring is connected with the electromagnetic iron core, the other end of the brake spring is connected with the armature, the brake block is fixed on the armature, the outer side of the armature is provided with an installation table, the installation table protrudes outwards relative to the electromagnetic iron core, the installation table is provided with a guide hole arranged along the sliding direction of the armature, and the guide post is connected with the guide hole in a sliding manner. The plate brake has the advantages of low requirements on the dimensional position precision of parts, simple processing, easy assembly and convenient maintenance.

Description

Plate brake

Technical Field

The invention relates to the technical field of brakes, in particular to a plate type brake.

Background

The brake is one of the most important safety components of an elevator. The types of brakes currently in use are drum brakes, disc brakes and plate brakes. Wherein, the plate brake is widely applied in the elevator industry by virtue of the characteristics of simple structure and low cost. The plate brake is a brake which is pressed on a brake wheel by a brake block to realize braking. In response to the design requirements for the miniaturization and noise reduction of the plate brake, the movement stroke of the brake pad is very small (generally, between 0.3mm and 0.5 mm), and thus the requirement for the guide accuracy of the brake pad is extremely high. If the guide precision of the brake block is insufficient, the brake block is easy to be stuck to cause brake failure, and safety accidents are caused. However, the requirement of extremely high guiding precision means that the guiding parts of the plate brake need to have extremely high dimensional and position precision, so that the processing and assembling difficulty of the plate brake is greatly improved. Further, since the guide component is worn to some extent after a long-term operation, it is necessary to perform regular inspection and cleaning, and if necessary, to replace the guide component with a new one. When the traditional plate brake is checked and cleaned, the plate brake needs to be integrally detached, the operation is very difficult, and the maintenance is inconvenient.

Disclosure of Invention

Based on the above, the present invention provides a plate brake, which has the advantages of low requirement on the precision of the size and the position of the components, simple processing, easy assembly and convenient maintenance.

The utility model provides a plate brake, includes electromagnetic core, supporting shoe, brake spring, brake pads, armature and guide post, electromagnetic core fixes on the supporting shoe, the last solenoid that is equipped with of electromagnetic core, brake spring's one end with electromagnetic core connects, brake spring's the other end with armature connects, brake pads is fixed on the armature, the outside of armature is equipped with the mount table, the mount table for electromagnetic core evagination, be equipped with the guiding hole that sets up along armature's slip direction on the mount table, the guide post with but guiding hole sliding connection.

According to the plate brake, the electromagnetic iron core is fixed at the position to be installed through the supporting block, and the armature and the braking block are located between the electromagnetic iron core and the brake wheel. When the plate brake is not braked, the electromagnetic coil is electrified to generate electromagnetic force, the armature overcomes the force of the brake spring, and the brake block leaves the brake wheel. When the plate brake brakes, the electromagnetic coil loses power, the electromagnetic force disappears, the armature slides along the guide post through the matching of the guide hole and the guide post under the action of the braking spring force, and the brake block is abutted against the brake wheel to realize braking. Because the guiding hole sets up on the mount table that extends and evaginate for electromagnetic core along armature's circumference, the orthographic projection of mount table and electromagnetic core on the installation face is misaligned, can install electromagnetic core, supporting shoe and armature earlier during the assembly, again according to the actual position of guiding hole with the guide post fix treat the mounted position department can. The position size precision of the mounting table is not specially required, the processing is simple, the assembly is easy, and the armature clamping stagnation caused by the tolerance accumulation of the position size chain is avoided. Meanwhile, when regular inspection and cleaning are carried out, only the guide post needs to be dismounted from the position to be mounted, the whole plate type brake does not need to be dismounted, the guide post can be directly replaced when abnormal, and the maintenance is convenient.

In one embodiment, the armature is provided with a through hole, the support block penetrates through the through hole and then is connected with the electromagnetic iron core, and the support block is in clearance fit with the through hole. On the one hand, the supporting block can be arranged inside the armature, the occupied space is reduced, the miniaturization requirement is met, on the other hand, the supporting block is in clearance fit with the through hole, the abrasion between the inner wall of the through hole and the supporting block when the armature slides can be avoided, and the processing and assembling difficulty can be reduced.

In one embodiment, the support block is in threaded connection with the electromagnetic core, so that the installation height of the electromagnetic core can be conveniently adjusted.

In one embodiment, a first mounting hole is formed in the electromagnetic core, a second mounting hole is formed in the supporting block, first fasteners penetrate through the first mounting hole and the second mounting hole, a third mounting hole is formed in the guide column, and second fasteners are arranged in the third mounting hole. The electromagnetic iron core and the supporting block are fixed at the position to be installed by the aid of the first fastening piece, and installation and disassembly are convenient. The guide post is fixed at the position to be installed by the second fastener, and the installation and the disassembly are convenient.

In one embodiment, a sliding bearing is arranged between the guide hole and the guide post, so that friction loss and surface wear can be effectively reduced, and smooth sliding of the armature is guaranteed.

In one embodiment, the brake block is provided with an arc-shaped groove for matching with a brake wheel. The contact area between the brake block and the brake wheel is greatly increased, and the braking effect is good.

In one embodiment, a microswitch is arranged on the electromagnetic iron core, a touch piece is arranged on the armature, and the microswitch and the touch piece are correspondingly arranged to detect the action state of the armature and provide braking information.

In one embodiment, the mounting table comprises a first mounting table and a second mounting table, the first mounting table and the second mounting table are respectively and symmetrically arranged on two sides of the armature, the guide holes comprise a first guide hole arranged on the first mounting table and a second guide hole arranged on the second mounting table, the guide posts comprise a first guide post and a second guide post, the first guide post is slidably connected with the first guide hole, and the second guide post is slidably connected with the second guide hole. Therefore, the sliding stability of the armature can be improved, and the braking effect is ensured.

In one embodiment, the number of the brake springs is at least two, and the at least two brake springs are arranged in an array, so that the armature is stressed more uniformly, and the brake performance is good.

In one embodiment, the number of the supporting blocks is at least two, and the at least two supporting blocks are arranged in an array mode, so that the electromagnetic iron core is firmly fixed and has good stability.

Drawings

FIG. 1 is a schematic cross-sectional view of a plate brake according to an embodiment of the present invention;

FIG. 2 is a schematic top view of a plate brake according to an embodiment of the present invention;

fig. 3 is a schematic top view of a plate brake according to another embodiment of the present invention.

Description of reference numerals:

100. the electromagnetic brake comprises an electromagnetic iron core, 101, a first mounting hole, 110, a supporting block, 111, a second mounting hole, 120, a brake spring, 130, a brake block, 140, an armature, 141, a first mounting table, 142, a first guide hole, 143, a second mounting table, 144, a second guide hole, 145, a through hole, 150, a first guide post, 151, a third mounting hole, 160, a second guide post, 170, a first fastener, 180, a second fastener, 190, a sliding bearing, 200, a microswitch, 210, a touch piece, 220, a motor base, 230 and a brake wheel.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the plate brake according to the present embodiment includes an electromagnetic core 100, a support block 110, a brake spring 120, a brake block 130, an armature 140, and a guide post. The electromagnetic core 100 is fixed on the supporting block 110, and an electromagnetic coil is arranged on the electromagnetic core 100. One end of the braking spring 120 is connected to the electromagnetic core 100, and the other end of the braking spring 120 is connected to the armature 140. The brake block 130 is fixed to the armature 140. The outer side of the armature 140 is provided with a mounting table, the mounting table protrudes outwards relative to the electromagnetic core 100, and the mounting table is provided with a guide hole arranged along the sliding direction of the armature 140. The guide post is connected with the guide hole in a sliding mode.

In the plate brake, the electromagnet core 100 is fixed to the motor housing 220 through the support block 110, and the armature 140 and the brake shoe 130 are located between the electromagnet core 100 and the brake wheel 230. When the plate brake is not braking, the electromagnetic coil is electrified to generate electromagnetic force, the armature 140 overcomes the force of the brake spring, and the brake block 130 is separated from the brake wheel 230. When the plate brake brakes, the electromagnetic coil loses power, the electromagnetic force disappears, the armature 140 slides along the guide post through the matching of the guide hole and the guide post, and the brake block 130 is abutted with the brake wheel 230 to realize braking. Because the guiding hole is arranged on the mounting table which extends along the circumferential direction of the armature 140 under the action of the braking spring force and protrudes outwards relative to the electromagnetic core 100, the mounting table does not coincide with the orthographic projection of the electromagnetic core 100 on the mounting surface, the electromagnetic core 100, the supporting block 110 and the armature 140 can be mounted during assembly, and then the guiding column is fixed on the motor shell 220 according to the actual position of the guiding hole. The position size precision of the mounting table is not specially required, the processing is simple, the assembly is easy, and the clamping stagnation of the armature 140 caused by the tolerance accumulation of the position size chain is avoided. Meanwhile, when regular inspection and cleaning are carried out, only the guide post needs to be detached from the motor shell 220 without detaching the whole plate brake, the guide post can be directly replaced when abnormal, and the maintenance is convenient.

In this embodiment, the mounting table includes a first mounting table 141 and a second mounting table 143, the first mounting table 141 and the second mounting table 143 are symmetrically disposed on two sides of the armature 140, the guide holes include a first guide hole 142 disposed on the first mounting table 141 and a second guide hole 144 disposed on the second mounting table 143, the guide posts include a first guide post 150 and a second guide post 160, the first guide post 150 is slidably connected to the first guide hole 142, and the second guide post 160 is slidably connected to the second guide hole 144. Therefore, the sliding stability of the armature 140 can be improved, and the braking effect is ensured.

The armature 140 according to the present embodiment has a rectangular parallelepiped shape. As shown in fig. 2, in the present embodiment, the first mounting stage 141 and the second mounting stage 143 may be symmetrically disposed with respect to a center line of the armature 140 as a symmetry axis. In another embodiment, as shown in fig. 3, the first and second mounting

platforms

141 and 143 may also be symmetrically disposed with respect to a diagonal line of the armature 140 as an axis of symmetry.

In the present embodiment, the armature 140 is provided with a through hole 145, the supporting block 110 is connected to the electromagnet core 100 after passing through the through hole 145, and the supporting block 110 is in clearance fit with the through hole 145. On one hand, the supporting block 110 can be arranged inside the armature 140, so that the occupied space is reduced, and the miniaturization requirement is met, and on the other hand, the supporting block 110 is in clearance fit with the through hole 145, so that the abrasion between the inner wall of the through hole 145 and the supporting block 110 when the armature 140 slides can be avoided, and the processing and assembling difficulty can be reduced. Specifically, the supporting block 110 is in threaded connection with the electromagnet core 100, so that the installation height of the electromagnet core 100 can be conveniently adjusted.

In this embodiment, the electromagnet core 100 is provided with a first mounting hole 101, the supporting block 110 is provided with a second mounting hole 111, and the first mounting hole 101 and the second mounting hole 111 are both provided with a first fastening member 170. The electromagnet core 100 and the supporting block 110 are fixed on the motor housing 220 by the first fastening member 170, so that the installation and the disassembly are convenient. Wherein the first fastening member 170 may be a screw, a bolt, etc. And a third mounting hole 151 is formed in the guide column, and a second fastening piece 180 is arranged in the third mounting hole 151. The guide post is fixed on the motor shell 220 by the second fastener 180, and the installation and the disassembly are convenient. Wherein the second fastening member 180 may be a screw, a bolt, etc.

Further, a sliding bearing 190 is arranged between the guide hole and the guide post, so that friction loss and surface wear can be effectively reduced, and smooth sliding of the armature 140 is ensured. The sliding bearing 190 may be mounted by fixing the outer ring in the guide hole or fixing the inner ring to the guide post.

The guide between the guide hole and the guide post is not limited to the sliding bearing 190, and may be achieved by performing special surface treatment on the mating surface of the guide hole and the guide post, and controlling the mating dimension of the guide hole and the guide post.

Preferably, the brake block 130 is provided with an arc-shaped groove for fitting with the brake wheel 230. The contact area of the brake block 130 and the brake wheel 230 is greatly increased, and the braking effect is good.

In this embodiment, the electromagnetic core 100 is provided with a micro switch 200, the armature 140 is provided with a touch member 210, and the micro switch 200 and the touch member 210 are correspondingly disposed to detect an action state of the armature 140 and provide braking information.

The number of the brake springs 120 is four, and the four brake springs 120 are arranged in an array, so that the stress of the armature 140 is more uniform, and the braking performance is good. It should be noted that, other numbers of the braking springs 120 may be provided according to actual needs, and the present invention is not limited to this. The number of the supporting blocks 110 is four, and the four supporting blocks 110 are arranged in an array, so that the electromagnetic core 100 is firmly fixed and has good stability. It should be noted that, other numbers of supporting blocks 110 may be provided according to actual needs, and are not limited to this.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The plate brake is characterized by comprising an electromagnetic iron core, a supporting block, a brake spring, a brake block, an armature and a guide post, wherein the electromagnetic iron core is fixed on the supporting block, the electromagnetic iron core can pass through the supporting block to be fixed on a motor shell of the plate brake, the armature is provided with a through hole, the supporting block penetrates through the through hole and then is connected with the electromagnetic iron core, the supporting block is in clearance fit with the through hole, the electromagnetic iron core is provided with an electromagnetic coil, one end of the brake spring is connected with the electromagnetic iron core, the other end of the brake spring is connected with the armature, the brake block is fixed on the armature, the outer side of the armature is provided with an installation table, the installation table is convex relative to the electromagnetic iron core, the installation table is provided with a guide hole arranged along the sliding direction of the armature, and the guide post is slidably connected with the guide hole.

2. The panel brake of claim 1, wherein the support block is threadably connected to the electromagnet core.

3. The plate brake of claim 1, wherein the electromagnet core is provided with a first mounting hole, the supporting block is provided with a second mounting hole, the first mounting hole and the second mounting hole are respectively provided with a first fastening piece, the guiding post is provided with a third mounting hole, and the third mounting hole is provided with a second fastening piece.

4. The plate brake of claim 1, wherein a sliding bearing is disposed between the guide hole and the guide post.

5. The panel brake of claim 1, wherein the brake pads have arcuate grooves for mating with a brake wheel.

6. The plate brake of claim 1, wherein the electromagnet core is provided with a micro switch, the armature is provided with a touch member, and the micro switch is arranged corresponding to the touch member.

7. The plate brake of any one of claims 1-6, wherein the mounting platform includes a first mounting platform and a second mounting platform, the first and second mounting platforms are symmetrically disposed on two sides of the armature, the guide holes include a first guide hole disposed on the first mounting platform and a second guide hole disposed on the second mounting platform, the guide posts include a first guide post and a second guide post, the first guide post is slidably connected to the first guide hole, and the second guide post is slidably connected to the second guide hole.

8. The plate brake of any of claims 1-6, wherein there are at least two of the braking springs, at least two of the braking springs being arranged in an array.

9. The plate brake of any one of claims 1-6, wherein there are at least two of the support blocks, at least two of the support blocks being arranged in an array.