CN215257529U

CN215257529U - Electromagnetic brake

Info

Publication number: CN215257529U
Application number: CN202121544094.0U
Authority: CN
Inventors: 阳波; 杨贤
Original assignee: Chengdu Chaodechuang Technology Co ltd
Current assignee: Chengdu Chaodechuang Technology Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2021-12-21
Anticipated expiration: 2031-07-07

Abstract

The utility model discloses an electromagnetic brake, this electromagnetic brake includes flange, brake block, movable plate and the fixed plate that sets gradually, wherein, movable plate one side is the braking face towards the brake block, and the movable plate opposite side passes through the elastic component and connects to the fixed plate, is equipped with permanent magnetism portion in the fixed plate, and permanent magnetism portion produces first magnetic force, and the elasticity that first magnetic force and elastic component produced offsets and disappears to make the movable plate be located between brake block and the fixed plate; the fixed plate is also internally provided with an electromagnetic part, the electromagnetic part is electrified to generate a second magnetic force, and the direction of the current is controlled to change the direction of the second magnetic force so as to enable the movable plate to slide towards the brake pad or the fixed plate. The electromagnetic brake has the advantages that the electrifying time is extremely short, the heat energy generated by electrifying is less, the heating condition of the brake is relieved, the brake can reach the designed service life, the use risk caused by heating is reduced, and the problem that the service life of the conventional electromagnetic brake is short due to long-term electrification is solved.

Description

Electromagnetic brake

Technical Field

The utility model belongs to the technical field of the stopper, concretely relates to electromagnetic braking ware.

Background

A brake is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving member (or a moving machine), and is also a mechanical part that stops or decelerates a moving member in a machine, and is commonly referred to as a brake or a gate. In order to reduce the braking torque and the structural size, the brake is usually mounted on the high-speed shaft of the equipment, but large equipment (such as a mine hoist, an elevator and the like) with higher requirements on safety is mounted on the low-speed shaft close to the working part of the equipment.

The brake has a plurality of new structural types due to the development of modern industrial machinery, and the caliper disc brake, the magnetic powder brake and the electromagnetic brake are most widely applied. The electromagnetic brake is described by taking a normally closed type as an example, and comprises a flange, a brake pad, a movable plate and a fixed plate, wherein a coil is arranged in the fixed plate, when the brake needs to be released, the coil is connected with a direct current power supply, the generated magnetic field attracts the movable plate to move towards the direction of the fixed plate, when the movable plate moves, a spring is compressed, the brake pad is released, the brake is released, and the motor starts to work normally.

In this case, a certain voltage must be continuously applied to the coil to maintain the brake on in terms of structure, which causes long-term energization and heat generation, resulting in a long service life of the brake.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electromagnetic brake has solved current electromagnetic brake because the short problem of life that leads to of long-term circular telegram.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an electromagnetic brake comprises a flange, a brake pad, a movable plate and a fixed plate which are arranged in sequence, wherein one side of the movable plate is a braking surface facing the brake pad, the other side of the movable plate is connected to the fixed plate through an elastic element, a permanent magnetic part is arranged in the fixed plate, the permanent magnetic part generates a first magnetic force, and the first magnetic force is offset with the elastic force generated by the elastic element so as to enable the movable plate to be positioned between the brake pad and the fixed plate;

the fixed plate is also internally provided with an electromagnetic part, the electromagnetic part is electrified to generate a second magnetic force, and the direction of the current is controlled to change the direction of the second magnetic force so as to enable the movable plate to slide towards the brake pad or the fixed plate.

In one possible design, the permanent magnet part is set as a permanent magnet, and a clamping groove matched with the permanent magnet is arranged in the fixed plate;

the electromagnetic part comprises a coil part arranged in the fixed plate and an outgoing line electrically connected with the coil part, one end of the outgoing line is connected with the coil part, and the other end of the outgoing line penetrates out of the fixed plate.

In one possible design, the elastic member is provided as one of a coil spring, an air spring, rubber, and metal rubber.

In one possible design, a positioning ring is provided on the outer side of the movable plate, which is coaxial with the movable plate, and one side of the positioning ring abuts against the flange and the other side of the positioning ring abuts against the stationary plate.

In a possible design, the holding ring includes ring body portion and the bulge loop portion that is located ring body portion internal week, wherein, the outer wall of ring body portion, the outer wall of fixed plate and the outer wall parallel and level of flange are equipped with the first hole body of a plurality of and a plurality of second hole body on the bulge loop portion, first hole body and second hole body evenly distributed are on the bulge loop portion.

In one possible design, the first aperture is spaced apart from the second aperture.

In one possible design, a third hole body is arranged on the fixed plate, a fourth hole body is arranged on the flange, the first hole body, the third hole body and the fourth hole body are coaxial and communicated to form a first connecting hole, and a first bolt is inserted into the first connecting hole;

the fixed plate is also provided with a fifth hole body which is coaxial and communicated with the second hole body to form a second connecting hole, and a second bolt is inserted in the second connecting hole.

In a possible design, be equipped with the shaft hole of adaptation in the axis body on the stationary plate, shaft hole one end is towards the movable plate, and the shaft hole other end is equipped with the apron that seals the shaft hole, and apron and stationary plate integrated into one piece.

Has the advantages that:

the electromagnetic brake has extremely short electrifying time, and the heating condition of the brake is relieved due to less heat energy generated by electrifying, so that the brake is favorable for reaching the designed service life, and meanwhile, the use risk caused by heating is reduced. The short power-on time also indicates that less energy is consumed in the use process, and the consumed energy is less, thereby conforming to the concept of energy-saving development.

Drawings

Fig. 1 is a schematic structural diagram of the electromagnetic brake in a braking state.

Fig. 2 is a schematic structural diagram of the electromagnetic brake in a released state.

Fig. 3 is a schematic structural view when the first bolt is provided.

Fig. 4 is a schematic structural view when the second bolt is provided.

Fig. 5 is a schematic structural view of a conventional electromagnetic brake.

In the figure:

1. a flange; 2. a brake pad; 3. a movable plate; 4. fixing a plate; 5. an elastic member; 6. a permanent magnet section; 7. an electromagnetic section; 71. a coil section; 72. an outgoing line; 8. a positioning ring; 91. a first bolt; 92. a second bolt; 10. and (7) a cover plate.

Detailed Description

Example (b):

as shown in fig. 1-4, an electromagnetic brake includes a flange 1, a brake pad 2, a movable plate 3 and a fixed plate 4, which are sequentially disposed, wherein one side of the movable plate 3 is a braking surface facing the brake pad 2, the other side of the movable plate 3 is connected to the fixed plate 4 through an elastic member 5, a permanent magnet portion 6 is disposed in the fixed plate 4, the permanent magnet portion 6 generates a first magnetic force, and the first magnetic force offsets an elastic force generated by the elastic member 5, so that the movable plate 3 is located between the brake pad 2 and the fixed plate 4.

When the electromagnetic brake works, the position of the movable plate 3 is controlled by switching on and off the power supply, the brake is in a braking state when the movable plate 3 is tightly attached to the brake pad 2, the brake is in a releasing state when the movable plate 3 is separated from the brake pad 2, the conventional electromagnetic brake is maintained in the braking state or the releasing state by switching on the coil for a long time, the service life of the brake is influenced and heat is continuously generated after the coil is switched on for a long time, and certain potential safety hazards exist.

In view of the above, the electromagnetic brake is improved, and specifically, the permanent magnet portion 6 functions like an electrified coil in an existing electromagnetic brake, and the permanent magnet portion 6 continuously provides the first magnetic force but avoids the defects of the electrified coil caused by long-term electrification. As for the magnetic force, it is known that the farther from the magnet, the smaller the magnetic force, and the distance is controlled, the magnetic force to which the movable plate 3 is subjected can be controlled. In a braking state, the movable plate 3 is far away from the permanent magnet part 6, and the first magnetic force is smaller than the elastic force of the elastic part 5, so that the movable plate 3 is tightly attached to the brake pad 2 under the pushing of the elastic force; in the released state, when the movable plate 3 is close to the permanent magnet portion 6, the first magnetic force is greater than the elastic force of the elastic member 5, and the movable plate 3 is attracted by the first magnetic force to be separated from the brake pad 2.

Obviously, the electromagnetic brake needs to be switched between a braking state and a releasing state during use, and correspondingly, the electromagnetic brake is further provided with an electromagnetic part 7, specifically, the electromagnetic part 7 is further arranged in the fixed plate 4, the electromagnetic part 7 is electrified to generate a second magnetic force, and the direction of the current is controlled to change the direction of the second magnetic force, so that the movable plate 3 slides towards the brake pad 2 or the fixed plate 4.

For example, when the current is a positive current, the direction of the second magnetic force is the same as the direction of the elastic force, and then the resultant force of the second magnetic force and the elastic force is greater than the first magnetic force, so that the moving plate 3 slides toward the brake pad 2 under the pushing of the resultant force, and the brake is in a braking state. When the current is reverse current, the direction of the second magnetic force is the same as that of the first magnetic force, the resultant force of the second magnetic force and the first magnetic force is larger than the elastic force, the movable plate 3 slides towards the fixed plate 4 under the pushing of the resultant force, and the brake is in a released state. In this case, the electromagnetic unit 7 is energized for a short time to change the magnitude and direction of the resultant force, so that the electromagnetic brake needs to be switched between the braking state and the released state during use.

Compared with the existing electromagnetic brake, the electromagnetic brake has the advantages that the electrifying time is extremely short, the heating condition of the brake is relieved due to the fact that the heat energy generated by electrifying is less, the service life of the brake is prolonged, and meanwhile, the use risk caused by heating is reduced. The short power-on time also indicates that less energy is consumed in the use process, and the consumed energy is less, thereby conforming to the concept of energy-saving development.

In this embodiment, the permanent magnet part 6 is a permanent magnet, and a clamping groove adapted to the permanent magnet is arranged in the fixed plate 4; the permanent magnet has magnetism, can produce magnetic force without circular telegram, and its kind is abundant, can select according to actual use condition or customer's requirement. The snap-in groove may be provided in any suitable shape, preferably as an annular groove, see fig. 1-2.

In the present embodiment, the electromagnetic unit 7 includes a coil portion 71 provided in the fixed plate 4 and a lead wire 72 electrically connected to the coil portion 71, one end of the lead wire 72 is connected to the coil portion 71, and the other end of the lead wire 72 passes through the fixed plate 4. The lead wire 72 is electrically connected to the power supply module, and the coil portion 71, the lead wire 72 and the power supply module form a loop, thereby controlling the power on/off of the electromagnetic portion 7 and the flow direction of the current.

Alternatively, the power module includes, but is not limited to, dry cells, lead storage batteries, lithium batteries, graphene batteries. It is easy to understand that the power on/off of the electromagnetic part 7 and how to control the current flow are conventional technical means well known to those skilled in the art, and will not be described herein.

In the present embodiment, the elastic member 5 is provided as one of a coil spring, an air spring, rubber, and metal rubber. The elastic body with elasticity is selected according to the actual use condition, or any other suitable elastic body with elasticity is selected.

In the present embodiment, a positioning ring 8 coaxial with the movable plate 3 is provided on the outer side of the movable plate 3, one side of the positioning ring 8 is in contact with the flange 1, and the other side of the positioning ring 8 is in contact with the stationary plate 4.

When the electromagnetic brake is used, the gap between the movable plate 3 and the fixed plate 4 is small, so when the machine equipment collides, one of the movable plate 3 and the fixed plate 4 displaces, the gap is damaged, and at least part of the movable plate 3 is in contact with the fixed plate 4, so that the electromagnetic brake generates noise, excessive wear and other conditions in the use process, the use experience is seriously influenced, and the service life of the brake is also greatly shortened.

In view of the above, the conventional electromagnetic brake has a supporting cylinder made of rubber, and referring to fig. 5, a flange 1 is connected to a fixed plate 4 through a bolt, the supporting cylinder is sleeved outside the bolt, and two ends of the supporting cylinder respectively abut against the flange 1 and the fixed plate 4. Meanwhile, in order to reduce the attachment of impurities such as dust and the like, an annular dustproof sleeve is arranged on the outer side of the supporting cylinder, the dustproof sleeve is made of elastic materials such as rubber and the like, and the supporting cylinder and the dustproof sleeve are matched with each other, so that the supporting function is achieved, and the attachment of the impurities is reduced.

However, when the collision acting force is large, the supporting cylinder cannot play a supporting role, and at least part of the movable plate 3 and the fixed plate 4 are in contact with each other. Meanwhile, after long-term use, the dustproof sleeve is aged and gradually separated, and the dustproof sleeve cannot completely cover the gap. Therefore, the electromagnetic brake replaces the positioning ring 8 with the positioning ring 8, the number of parts is reduced, good supporting and dust-proof effects are achieved, the performance of the positioning ring 8 is unchanged after long-term use, and the pressure of later maintenance is reduced.

Specifically, in one possible design, the positioning ring 8 includes a ring body portion and a collar portion located on the inner periphery of the ring body portion, the ring body portion serves as a support and a dust-proof function, and the collar portion serves as a connection function, so that the positioning ring 8 is held in the working position.

Alternatively, the outer wall surface of the ring body, the outer wall surface of the fixed plate 4 and the outer wall surface of the flange 1 are flush, or the three outer wall surfaces are not flush, and the arrangement is performed by the skilled person according to the actual use requirement.

Meanwhile, the convex ring part is provided with a plurality of first hole bodies and a plurality of second hole bodies, and the first hole bodies and the second hole bodies are uniformly distributed on the convex ring part. The first is used to connect the brake to the rest of the equipment and the second is used to connect the retaining ring 8 to the stationary plate 4. Specifically, a third hole body is arranged on the fixed plate 4, a fourth hole body is arranged on the flange 1, the first hole body, the third hole body and the fourth hole body are coaxial and communicated to form a first connecting hole, and a first bolt 91 is inserted into the first connecting hole; first bolt 91 passes third hole body, first hole body and fourth hole body in proper order, and then connects in all the other equipment, and the end cap of bolt is located and decides outside board 4 to in dismantling.

The fixed plate 4 is further provided with a fifth hole body, the fifth hole body is coaxial and communicated with the second hole body to form a second connecting hole, and a second bolt 92 is inserted into the second connecting hole. The second bolt 92 sequentially passes through the second hole and the fifth hole, so as to connect the positioning ring 8 with the fixed plate 4. The flange 1 covers the end caps of the bolts to reduce the adherence of dust.

Preferably, the first hole body and the second hole body are arranged at intervals. Therefore, the electromagnetic brake is more uniform in stress and is beneficial to prolonging the service life.

In this embodiment, the fixed plate 4 is provided with a shaft hole adapted to the shaft body, one end of the shaft hole faces the movable plate 3, the other end of the shaft hole is provided with a cover plate 10 for sealing the shaft hole, and the cover plate 10 and the fixed plate 4 are integrally formed. In some use cases, a rubber dustproof cover is arranged at the shaft hole and can fall off due to aging, so that the cover plate 10 is arranged to avoid the condition; and the cover plate 10 and the fixed plate 4 are integrally formed, so that the protection performance is improved, and the service life is prolonged.

Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electromagnetic brake is characterized by comprising a flange (1), a brake pad (2), a movable plate (3) and a fixed plate (4) which are sequentially arranged, wherein one side of the movable plate (3) is a braking surface facing the brake pad (2), the other side of the movable plate (3) is connected to the fixed plate (4) through an elastic piece (5), a permanent magnet part (6) is arranged in the fixed plate (4), the permanent magnet part (6) generates a first magnetic force, and the first magnetic force offsets with the elastic force generated by the elastic piece (5) so that the movable plate (3) is positioned between the brake pad (2) and the fixed plate (4);

an electromagnetic part (7) is further arranged in the fixed plate (4), the electromagnetic part (7) is electrified to generate a second magnetic force, and the direction of the current is controlled to change the direction of the second magnetic force, so that the movable plate (3) slides towards the brake pad (2) or the fixed plate (4).

2. The electromagnetic brake of claim 1, characterized in that the permanent magnet part (6) is provided as a permanent magnet, and a clamping groove adapted to the permanent magnet is provided in the fixed plate (4);

the electromagnetic part (7) comprises a coil part (71) arranged in the fixed plate (4) and a lead wire (72) electrically connected to the coil part (71), one end of the lead wire (72) is connected to the coil part (71), and the other end of the lead wire (72) penetrates out of the fixed plate (4).

3. Brake according to claim 1, characterized in that the resilient member (5) is provided as one of a helical spring, an air spring, rubber and metal rubber.

4. Electromagnetic brake according to claim 1, characterized in that the outer side of the movable plate (3) is provided with a positioning ring (8) coaxial with the movable plate (3), one side of the positioning ring (8) abutting against the flange (1) and the other side of the positioning ring (8) abutting against the stationary plate (4).

5. The electromagnetic brake of claim 4, characterized in that the positioning ring (8) comprises a ring body part and a convex ring part arranged on the inner periphery of the ring body part, wherein the outer wall surface of the ring body part, the outer wall surface of the fixed plate (4) and the outer wall surface of the flange (1) are flush, a plurality of first holes and a plurality of second holes are arranged on the convex ring part, and the first holes and the second holes are uniformly distributed on the convex ring part.

6. The electromagnetic brake of claim 5, wherein the first aperture is spaced apart from the second aperture.

7. The electromagnetic brake of claim 5, characterized in that the fixed plate (4) is provided with a third hole, the flange (1) is provided with a fourth hole, the first hole, the third hole and the fourth hole are coaxial and communicated to form a first connection hole, and a first bolt (91) is inserted into the first connection hole;

the fixed plate (4) is also provided with a fifth hole body which is coaxial and communicated with the second hole body to form a second connecting hole, and a second bolt (92) is inserted in the second connecting hole.

8. The electromagnetic brake of any one of claims 1-7, characterized in that the stationary plate (4) is provided with a shaft hole adapted to the shaft body, one end of the shaft hole faces the movable plate (3), the other end of the shaft hole is provided with a cover plate (10) for closing the shaft hole, and the cover plate (10) is integrally formed with the stationary plate (4).