CN212775281U

CN212775281U - Electromagnetic pressure release brake

Info

Publication number: CN212775281U
Application number: CN202021485122.1U
Authority: CN
Inventors: 徐璐; 游青平; 许大甜; 方学合; 金璐
Original assignee: Zhejiang Xizi Forward Electrical Machinery Co Ltd
Current assignee: Zhejiang Xizi Forward Electrical Machinery Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-03-23
Anticipated expiration: 2030-07-24

Abstract

The utility model provides an electromagnetic release pressure brake, including interact's electro-magnet and armature, with armature complex take the brake disc of pivot mounting hole, be provided with solenoid on the electro-magnet, arranged elastic element between electro-magnet and the armature, armature is the annular, and uses the axis of pivot mounting hole as the benchmark, along radial from interior to exterior coaxial arrangement a plurality ofly, each armature homoenergetic can all or the part contacts with the brake disc, and solenoid includes the multiunit, and is corresponding with each armature respectively. The utility model discloses, practical simple, arbitrary a set of solenoid outage, armature move towards the brake disc direction, because armature is the annular with the working face of brake disc, the brake block of equipartition on the brake disc terminal surface provides even stable brake force to the brake disc, even break down at a set of solenoid or armature wherein, equipment still can steadily brake.

Description

Electromagnetic pressure release brake

Technical Field

The utility model relates to a stopper especially relates to an electromagnetism release pressure brake.

Background

In the field of elevators, in view of the market requirements of space, national standards and customer requirements of the existing machine room-free traction machine on single-arm brake detection outside a car and low cost, a double-loop brake for a steel wire rope traction machine and a steel belt type traction machine is widely popularized.

In the invention patent with application number 200680022611.X, an attachment arrangement of a spring pressure brake is disclosed. The attachment is provided with a spring pressure brake composed of a coil provided on a bobbin, an armature plate fitted to the coil, and friction linings at both ends of the rotor end side, and the like, and at least two of the spring pressure brakes are arranged on the central axis of the eccentric rotor. The arrangement mode meets the requirement of the brake with double-loop characteristics, and can be applied to the lifting device. However, when the spring pressure brakes brake the rotor, each set of armature discs only brakes one end of the side edge of the rotor, and particularly when one of the spring pressure brakes fails, the braking force of the rotor in the circumferential direction is not uniform, the braking torque of each spring pressure brake is greatly different, and therefore, the potential safety hazard exists, and the service life of the spring pressure brake is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The present invention provides an electromagnetic pressure release brake, wherein each armature is in a coaxial ring shape, and the brake disc is uniformly applied with an acting force during braking, so as to overcome the above-mentioned defects of the prior art.

In order to achieve the above object, the utility model provides an electromagnetic release pressure brake, including interact's electro-magnet and armature, with armature complex take the brake disc of pivot mounting hole, be provided with solenoid on the electro-magnet, elastic element has been arranged between electro-magnet and the armature, armature is the annular, and with the axis of pivot mounting hole is the benchmark, along radially from inside to outside coaxial a plurality of, each of arranging armature homoenergetic with the brake disc is whole or the part contacts, solenoid includes the multiunit, respectively with each armature is corresponding.

When the brake disc is used, the brake disc is installed on the rotating shaft of the tractor, and components such as the brake disc, the armature iron and the like are positioned between the electromagnet and the braking wall of the shell. When the electromagnetic coil is electrified, the armature moves to one side of the electromagnet, the brake disc is separated from the limit and can rotate freely, and therefore the rotating shaft can rotate freely. When braking, any group of electromagnetic coils is powered off or is powered off completely, under the action of the elastic element, the corresponding armatures of the group of electromagnetic coils move towards the direction of the brake disc and press the brake disc against the brake wall of the shell, two sides of the brake disc are respectively under the friction of the armatures and the brake wall, and finally the brake disc drives the rotating shaft to stop moving. The annular armature can provide uniform and stable braking force for the brake disc, and has good braking effect and long service life. Meanwhile, the structure enables the axial length of the whole brake to be shorter, and the applicable range to be wider. In addition, each armature is controlled by an independent electromagnetic coil, and even when one group of the electromagnetic coils or the armatures fails, the device can still brake smoothly.

Preferably, the positions of the electromagnetic coils of each group corresponding to the armature are uniformly distributed in an annular shape. Each set of electromagnetic coils may comprise a plurality. Each group of electromagnetic coils can be annular, and a plurality of electromagnetic coils can be uniformly arranged into an annular shape. Therefore, the annular armatures can be uniformly stressed and can move along the axial direction, so that the armatures can be completely or partially contacted with or separated from the brake disc.

Preferably, an axial guide structure is arranged between the armature and the electromagnet, and the axial guide structure comprises a guide pin axially arranged between the armature and the electromagnet along the rotating shaft mounting hole and a guide groove for accommodating the guide pin. This structure ensures smooth movement of the armature in the axial direction. The guide pin and the guide groove are respectively arranged on the armature and the electromagnet, and the armature and the electromagnet can be exchanged in position as long as the armature and the electromagnet are separated into two parts.

Preferably, the electromagnet is provided with a mounting bolt connected with the braking wall. Thus, the brake can be stably mounted on the braking wall.

Preferably, an axial guide structure is arranged between the armature and the electromagnet, the axial guide structure comprises a guide hole formed in the armature and a mounting bolt penetrating through the guide hole, and the surface of a matching section of the mounting bolt and the guide hole is smooth. The mounting bolt penetrates through the guide hole, so that the armature can be fixed in the radial direction, and the armature can be guaranteed to move along the axial direction.

Preferably, the mounting bolt is sleeved with a gap adjusting mechanism, the gap adjusting mechanism is a hollow bolt, one end of the hollow bolt is connected to the electromagnet in a threaded manner, and the other end of the hollow bolt is abutted to the brake wall.

Preferably, the mounting bolt is sleeved with a gap adjusting mechanism, the gap adjusting mechanism comprises a shaft sleeve and a plug sheet, one end of the shaft sleeve abuts against the electromagnet, the other end of the shaft sleeve abuts against the brake wall, and the plug sheet is inserted between the shaft sleeve and the brake wall.

The hollow bolt or the shaft sleeve and the plug sheet can effectively adjust the distance between the electromagnet and the armature.

Preferably, a brake pad is arranged on an acting surface of one side, facing the brake wall, of the brake disc, and a brake pad which acts on each armature is arranged on an acting surface of one side, facing the armature, of the brake disc.

Preferably, the brake pads on both sides of the brake disc are symmetrically arranged and are arranged in a ring shape corresponding to the position of each armature.

The brake pad can increase the friction force, so that the braking effect is better.

Preferably, a disengagement monitoring device is provided between the electromagnet and each of the armatures. The disengagement monitoring devices are respectively used for detecting whether the armatures are disengaged or not, so that the working state of the brake is confirmed, and safety and reliability are guaranteed.

As described above, the utility model relates to an electromagnetic release pressure brake has following beneficial effect: because the action surfaces of the armature and the brake disc are annular, the brake pads uniformly distributed on the end surface of the brake disc provide uniform and stable braking force for the brake disc, the braking effect is good, and the service life is long; the plurality of armatures can realize braking independently, and the reliability is good. Meanwhile, the structure enables the axial length of the whole brake to be shorter, and the applicable range to be wider. In addition, a gap adjusting mechanism is arranged between the electromagnet and the shell braking wall, so that the distance between the electromagnet and the armature can be conveniently adjusted.

Drawings

Fig. 1 is a schematic view of an explosion structure of an electromagnetic release pressure brake of the present invention;

fig. 2 is a schematic structural diagram of an electromagnetic pressure release brake according to the present invention;

FIG. 3 is a schematic view of the gap adjustment mechanism (using a shaft sleeve) of the present invention;

FIG. 4 is a schematic view of the gap adjustment mechanism (using a hollow bolt) of the present invention;

fig. 5 is a schematic view of a partial structure of the disengagement monitoring device of the present invention.

Reference numerals:

1. an electromagnet; 2. an electromagnetic coil; 2a, an outer electromagnetic coil; 2b, an inner electromagnetic coil; 3. an armature; 3a, an outer ring armature; 3b, an inner ring armature; 4. an elastic element; 4a, an outer ring elastic element; 4b, an inner ring elastic element; 5. a brake disc; 6. a rotating shaft mounting hole; 7. a brake pad; 7a, a first outer brake ring; 7b, a first inner brake ring; 7c, a second outer brake ring; 7d, a second inner brake ring; 8. installing a bolt; 9. a guide hole; 10. a guide pin; 11. a guide groove; 12. a hollow bolt; 13. a shaft sleeve; 14. Disengaging the monitoring device; 14a, a first monitoring device; 14b, a second monitoring device; 15. a housing; 16. a stopper wall; 17. a rotating shaft.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

As shown in fig. 1 to 5, the present invention provides an electromagnetic pressure release brake, which includes an electromagnet 1 installed on a casing 15, and an end surface of the electromagnet 1 is disposed opposite to a braking wall 16 on the casing 15. The brake also comprises an armature 3 and a brake disc 5 which is matched with the armature 3 and is provided with a rotating shaft mounting hole 6. Each armature 3 is annular and takes the axis of the rotating shaft mounting hole 6 as a reference, and a plurality of armatures are arranged coaxially from inside to outside along the radial direction. Each armature 3 can be in contact with all or part of the brake disc 5, electromagnetic coils 2 are arranged on the electromagnet 1 corresponding to the armature 3, and elastic elements 4 are arranged between the electromagnet 1 and each armature 3. In the present embodiment, the electromagnetic coils 2 are provided with two sets, each set of electromagnetic coils 2 includes only one electromagnetic coil 2, correspondingly, the armatures 3 are also provided with two sets, and the electromagnetic coils 2 are preferably in a circular ring structure, and the two sets of electromagnetic coils are respectively an outer electromagnetic coil 2a at the outer side and an inner electromagnetic coil 2b at the inner side. Of course, each group of electromagnetic coils 2 may be configured as an annular shape as in this embodiment, or may be formed by uniformly arranging a plurality of electromagnetic coils in an annular shape, and it is only necessary to ensure that when the electromagnetic coils are energized, the annular armatures 3 are uniformly stressed and can move along the axial direction, so that each armature 3 can be in contact with or separated from all or part of the brake disc 5. The two armatures 3 are respectively an outer ring armature 3a corresponding to the outer electromagnetic coil 2a and an inner ring armature 3b corresponding to the inner electromagnetic coil 2 b. Wherein, the outer ring armature 3a and the inner ring armature 3b between the electromagnet 1 and the casing braking wall 16 can move along the axial direction. The elastic elements 4 are also uniformly distributed annularly at the positions corresponding to the respective armatures 3. The elastic element 4 is arranged along the axial direction, two ends of the elastic element are respectively connected with the corresponding armatures 3 and the electromagnet 1, wherein the electromagnet 1 is further provided with a containing cavity for installing the elastic element 4 and the electromagnetic coil 2. Preferably, the elastic element 4 may be a brake spring. The shaft mounting hole 6 can be provided with a spline to be connected with the tractor rotating shaft, so that the brake disc 5 and the tractor rotating shaft only generate relative axial movement and do not rotate relatively. Preferably, brake pads 7 are symmetrically fixed on two sides of the brake disc 5, and when the brake is in braking, the brake pads 7 on two sides are respectively used for generating friction braking force with the corresponding armature 3 and the shell braking wall 16. In the embodiment, the brake pads 7 are arranged into two groups, wherein one group is a first inner brake ring 7b corresponding to the position of the inner ring armature 3b and a second inner brake ring 7d matched with the shell brake wall 16; the other group is a first outer brake ring 7a corresponding to the position of the outer ring armature 3a and a second outer brake ring 7c matched with the shell brake wall 16.

In practical application, the brake disc 5 is installed on the rotating shaft 17 of the traction machine through the mounting hole 6 of the rotating shaft 17. When the brake is electrified, namely the outer electromagnetic coil 2a and the inner electromagnetic coil 2b are electrified simultaneously, the outer ring armature 3a compresses the elastic element 4 (brake spring) under the action of the magnetic force of the outer electromagnetic coil 2a and moves towards the electromagnet 1, and the gap between the end face of the outer ring armature 3a facing the brake wall and the brake pad 7 of the brake disc 5 is enlarged. Similarly, the gap between the end surface of the inner ring armature 3b facing the brake wall and the brake pad 7 of the brake disc 5 becomes larger. Thus, the hoisting machine rotation shaft 17 rotates the brake disc 5, and the brake disc 5 approaches the armature 3 side by centrifugal force. In this state, a large gap exists between the brake pad 7 of the brake disc 5 and the armature 3 and between the brake pad and the casing braking wall 16, and the brake disc 5 rotates, so that the traction machine operates normally.

When the outer electromagnetic coil 2a and the inner electromagnetic coil 2b have no current, the elastic element 4 (brake spring) acts on the outer ring armature 3a and the inner ring armature 3b respectively to transmit the thrust to the brake disc 5 to rub against the shell brake wall 16, so that the tractor rotating shaft 17 is braked through the brake disc 5, and the state is double-arm braking. Of course, a single arm stop may be used. The single-arm braking condition is divided into two conditions of single-arm braking of the inner ring armature 3b and single-arm braking of the outer ring armature 3a, and the single-arm braking of the inner ring armature 3b is explained as follows: when the single-arm brake detection is needed or the conditions of jamming of the outer ring armature 3a, failure of the electromagnetic coil and the like occur, the inner ring armature 3b pushes the brake disc 5 to realize the single-arm brake function. When the inner ring armature 3b is braked and stopped, the second outer brake ring 7c and the second inner brake ring 7d on the brake disc 5 are attached to the shell brake wall 16, the first inner brake ring 7b is attached to the inner ring armature 3b, and then the brake disc 5 is rubbed to realize the single-arm braking function of the tractor rotating shaft 17. When the inner ring armature 3b is blocked or the inner electromagnetic coil 2b fails, the outer ring armature 3a can also realize the single-arm braking function.

And, because each group of armature 3 is set as the concentric ring, the armature 3 that two groups of magnet coils 2 can be matched with it correspondingly is arranged coaxially, two end faces of the brake disc 5 are arranged with the ring brake block matched with said armature 3 and brake wall 16 respectively, while braking, the ring armature 3 is matched with the ring brake block 7 distributed on the end face of the brake disc 5 uniformly, provide the even and stable brake force, even if one group of magnet coils or armature breaks down, the apparatus can still brake smoothly. This facilitates safe and smooth operation of the operating equipment and reduces brake wear. In an actual product, for example, the brake is mounted on the hoisting machine, the brake provides a one-arm braking torque greater than 1.25 times the rated torque of the hoisting machine rotating shaft, and a two-arm braking torque greater than 2.5 times the rated torque of the hoisting machine rotating shaft. Because the arm of force of the inner ring armature 3b is smaller than that of the outer ring armature during braking, the elastic pressure of the inner ring elastic element 4b acting on the electromagnet 1 and the inner ring armature 3b is larger than that of the outer ring elastic element 4a acting on the electromagnet 1 and the outer ring armature 3 a.

Preferably, the electromagnet 1 is fixed to the housing by means of mounting bolts 8. In this embodiment, the mounting bolt 8 penetrates the outer ring armature 3a, wherein the polished rod portion of the bolt is located in a guide hole 9 formed in the outer ring armature 3 a. This not only enables the electromagnet 1 to be connected to the outer ring armature 3a, but also the polished rod portion of the bolt can function to guide the axial displacement of the outer ring armature 3a when the outer ring armature 3a is axially displaced. Of course, the guide structure may also be a guide pin 10 arranged between the armature 3 and the electromagnet 1 and a guide groove 11 for receiving the guide pin 10. In the present embodiment, the inner ring armature 3b is guided by the guide structure during axial displacement.

A gap adjusting mechanism is also arranged between the electromagnet 1 and the armature 3, and comprises a hollow bolt 12 or a shaft sleeve 13 sleeved on the mounting bolt 8. If the sleeve 13 is used for gap adjustment, the gap adjustment mechanism further includes a plug located between the sleeve 13 and the stopper wall 16. Wherein, the threaded connection of one end of hollow bolt 12 is on electro-magnet 1, along with the construction bolt 8 stretches into in electro-magnet 1, and the other end cooperatees with braking wall 16 and butts. When the gap between the electromagnet 1 and the armature 3 needs to be adjusted, the hollow bolt 12 is only required to be rotated, so that the distance between the electromagnet 1 and the braking wall 16 is adjusted, and further the distance between the electromagnet 1 and the armature 3 is adjusted. The sleeve 13 and the plug piece are arranged such that one end of the sleeve 13 abuts against the electromagnet 1 and the other end abuts against the stopper wall 16. When the gap between the electromagnet 1 and the armature 3 needs to be adjusted, only a plug sheet needs to be added between the casing braking wall 16 and the shaft sleeve 13. The gap adjusting mechanism may be provided on the outer ring armature 3a and the inner ring armature 3b, and when the gap adjusting mechanism needs to pass through the armature 3, a portion passing through the armature 3 should be smooth in surface.

A release monitoring device 14 is also provided between each group of solenoids 2 and the corresponding armatures 3. In the present embodiment, a first monitoring device 14a is provided between the outer electromagnetic coil 2a and the corresponding outer ring armature 3a, and a second monitoring device 14b is provided between the inner electromagnetic coil 2b and the corresponding inner ring armature 3b, respectively, for detecting whether the electromagnetic coil 2 and the adapted armature 3 are disengaged, so as to confirm the working state of the brake, thereby ensuring safety and reliability.

It should be noted that the number of electromagnetic coils 2 corresponding to the armatures 3 is not necessarily equal to the number of armatures 3, and may be larger than the number of armatures 3. That is, two or more electromagnetic coils 2 may be used as one set, and simultaneously act on the same armature 3, and the respective electromagnetic coil 2 circuits of each set may be optionally independently provided. The attractive force between each group of electromagnetic coils 2 and the armature 3 can be enhanced, and the situation that the normal work of the brake is influenced because the corresponding armature 3 cannot be attracted when a circuit of one electromagnetic coil 2 goes wrong can be avoided. It should be noted that the number of the armatures 3 is not limited to two, and three or more armatures 3 may be selected to further increase the safety of the brake. For example, with a three-armature 3 design, which can be actuated separately, the respective brake can implement a single-arm brake function, a double-arm brake function or a triple-arm brake function. The specific implementation is similar to the above embodiments, and is not described herein again.

Generally, the utility model relates to an electromagnetic release pressure brake, this stopper structural feature are solenoid 2 and armature 3 of at least two sets of coaxial arrangements, and each group's solenoid 2 and armature 3 all can realize independent electrical control to make, but each armature 3 parallel edge the central axis promotes the brake disc, when realizing the braking, the brake disc provides even stable brake force.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides an electromagnetism release pressure brake, includes interact's electro-magnet (1) and armature (3), with armature (3) complex brake disc (5) of taking pivot mounting hole (6), be provided with solenoid (2) on electro-magnet (1), be arranged between electro-magnet (1) and armature (3) elastic element (4), characterized by: the armatures (3) are annular, a plurality of armatures are coaxially arranged from inside to outside along the radial direction by taking the axis of the rotating shaft mounting hole (6) as a reference, each armature (3) can be in contact with all or part of the brake disc (5), and the electromagnetic coil (2) comprises a plurality of groups which correspond to each armature (3) respectively.

2. An electromagnetic release pressure brake as claimed in claim 1, characterized by: the positions of the electromagnetic coils (2) corresponding to the armature (3) are uniformly distributed in a ring shape.

3. An electromagnetic release pressure brake as claimed in claim 1, characterized by: an axial guide structure is arranged between the armature (3) and the electromagnet (1), and comprises a guide pin (10) axially arranged between the armature (3) and the electromagnet (1) along the rotating shaft mounting hole (6) and a guide groove (11) used for accommodating the guide pin (10).

4. An electromagnetic release pressure brake as claimed in claim 1, characterized by: and the electromagnet (1) is provided with a mounting bolt (8) connected with the brake wall (16).

5. An electromagnetic release pressure brake as claimed in claim 4, characterized by: an axial guide structure is arranged between the armature (3) and the electromagnet (1), the axial guide structure comprises a guide hole (9) formed in the armature (3) and a mounting bolt (8) penetrating through the guide hole (9), and the surface of the matching section of the mounting bolt (8) and the guide hole (9) is smooth.

6. An electromagnetic release pressure brake as claimed in claim 4, characterized by: the mounting bolt (8) is sleeved with a gap adjusting mechanism which is a hollow bolt (12), one end of the hollow bolt (12) is connected to the electromagnet (1) in a threaded mode, and the other end of the hollow bolt is abutted to the braking wall (16).

7. An electromagnetic release pressure brake as claimed in claim 4, characterized by: the mounting bolt (8) is sleeved with a gap adjusting mechanism, the gap adjusting mechanism comprises a shaft sleeve (13) and a plug piece, one end of the shaft sleeve (13) is abutted to the electromagnet (1), the other end of the shaft sleeve (13) is abutted to the braking wall (16), and the plug piece is inserted between the shaft sleeve (13) and the braking wall (16).

8. An electromagnetic release pressure brake as claimed in claim 1, characterized by: still include braking wall (16), brake disc (5) orientation be equipped with brake block (7) on the action face of braking wall (16) one side, brake disc (5) orientation be equipped with on the action face of armature (3) one side with each brake block (7) that armature (3) are used mutually.

9. An electromagnetic release pressure brake as defined in claim 8, wherein: the brake pads (7) on two sides of the brake disc (5) are symmetrically arranged and are annularly arranged corresponding to the positions of the armatures (3).

10. An electromagnetic release pressure brake as claimed in claim 1, characterized by: a disconnection monitoring device (14) is arranged between the electromagnet (1) and each armature (3).