CN110768456A - A motor brake and equipment - Google Patents

Abstract

The embodiment of the present invention provides a motor brake and equipment, the motor brake includes: a frame, a brake pad, a motor extension shaft, an action rod, a limit block and an electromagnet, and a first through hole is provided in the center of the frame, The edge position of the frame is provided with a second through hole, and the center position of the brake pad is provided with a third through hole. The motor extension shaft is connected to the frame through the first through hole, and passes through the third through hole to fix the brake pad to the motor. On the extension shaft, the limit block is installed between the first through hole and the second through hole on the frame, the distance from the limit block to the center of the first through hole is smaller than the radius of the circumcircle of the brake pad, and the limit block is in the brake pad. In the state, the height above the surface of the frame is greater than the gap distance between the brake pads and the frame, so as to limit the axial rotation of the brake pads. The motor brake restricts the rotation of the brake pad through the limit block, and the volume of the motor brake is smaller than the volume of the circular brake pad and the holding brake in the prior art, and the light weight and miniaturization of the motor brake can be realized.

Description

A motor brake and equipment

technical field

The invention relates to the technical field of brakes, in particular to a motor brake and equipment.

Background technique

At present, the motor brake mostly adopts the disc structure, and the motor brake of the disc structure includes a circular brake pad and a holding brake. When the motor is powered off, the brake hugs the circular brake pad, and friction occurs between the brake and the circular brake pad. The work done by the friction force cancels the residual kinetic energy of the motor shaft, and the motor shaft and the brake pad stop rotating.

The motor brake of the disc structure is used, in order to obtain a better braking effect, there is a larger contact area between the circular brake pad and the brake to improve the reliability of the brake. This makes the circular brake pads and brakes too bulky and heavy, which is not in line with the current market demand for lightweight and miniaturization.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to provide a motor brake and equipment, so as to realize the lightweight and miniaturization of the motor brake.

An embodiment of the present invention provides a motor brake, comprising:

a frame, the center of the frame is provided with a first through hole, and the edge position of the frame is provided with a second through hole;

Brake pads, the brake pads are of a polygonal star structure, and the radius of the circumscribed circle of the brake pads is smaller than the distance between the center of the first through hole and the center of the second through hole, and the center position of the brake pad A third through hole is opened;

The motor extension shaft passes through the first through hole and is axially rotatably fixed on the frame, and the motor extension shaft passes through the third through hole, so that the brake The sheet is fixed on the extension shaft of the motor;

an action rod, which passes through the second through hole and is movably fixed on the frame along the axis direction;

A limit block, the limit block is installed on the side of the frame close to the brake pad, and is installed between the first through hole and the second through hole, the limit block and the The distance between the centers of the first through holes is smaller than the radius of the circumscribed circle of the brake pad, and the distance between the limit block higher than the surface of the frame is greater than the gap between the brake pad and the frame , so as to limit the axial rotation of the brake pad along with the extension shaft of the motor;

an electromagnet, which is installed on the side of the frame away from the brake pad;

When the electromagnet is energized, the action rod moves along the axis direction under the action of the magnetic force provided by the electromagnet, and drives the limit block to move along the axis direction until the limit block is higher than the machine The distance between the frame surfaces is less than the gap distance between the brake pads and the frame.

Optionally, the motor brake further includes a spring, and the spring is installed between the limit block and the frame to provide elastic force for the reset of the limit block;

When the electromagnet is energized, the action rod moves in the axial direction under the action of the magnetic force provided by the electromagnet, and drives the limit block to move, so that the limit block compresses the spring, the spring in a compressed state;

When the electromagnet is not energized, the limit block moves under the action of the elastic force provided by the spring until the distance between the limit block higher than the surface of the frame is greater than the distance between the brake pad and the When the gap between the racks is removed, the spring returns to its original state.

Optionally, the motor extension shaft is a stepped shaft.

Optionally, the motor extension shaft includes a first step extension shaft, a second step extension shaft and a third step extension shaft;

The diameter of the first step extension shaft is larger than the diameter of the second step extension shaft, and the diameter of the second step extension shaft is larger than the diameter of the third step extension shaft;

The third step extension shaft passes through the first through hole and is axially rotatably fixed on the frame, and the second step extension shaft passes through the third through hole, so that the brake The plate is fixed on the extension shaft of the motor, and the first step extension shaft is used for restricting the movement of the brake pad along the axis direction of the extension shaft of the motor.

Optionally, the motor brake further includes a wave washer, the wave washer is sleeved on the motor extension shaft and installed between the brake pad and the first stepped extension shaft.

Optionally, the motor brake further includes a floating retaining ring, the floating retaining ring is sleeved on the motor extension shaft and located between the brake pad and the wave washer.

Optionally, the motor brake further includes a fixed retaining ring, the fixed retaining ring is sleeved on the extension shaft of the motor and is located on the side of the brake pad away from the floating retaining ring.

Optionally, the motor brake further includes a pin;

One end of the limiting block is provided with a fourth through hole, the frame is provided with a blind hole and a fifth through hole (140), and the axes of the blind hole and the fifth through hole are on the same straight line;

The pin passes through the fifth through hole and the fourth through hole, and is inserted into the blind hole, so as to connect the limit block with the frame; the pin and the fifth through hole are interference fit, the pin and the fourth through hole are clearance fit;

One end of the limit block connected to the frame is lower than the surface of the frame close to the brake pad; the distance between the other end of the limit block higher than the surface of the frame is greater than that of the brake pad clearance from the frame;

When the electromagnet is energized, the action rod moves along the axis direction under the action of the magnetic force provided by the electromagnet, and drives the end of the limit block that is not connected to the frame to move.

Optionally, there are two limit blocks, one end of the two limit blocks connected to the frame is far away, and two ends of the two limit blocks not connected to the frame are close to each other.

Optionally, the action lever includes:

a limiting member, the limiting member is located on the side of the frame close to the brake pad;

an installation part, the electromagnet is installed around the installation part; the installation part is located on the side of the frame away from the brake pad;

a connecting part, the diameter of the cross section of the connecting part is smaller than the diameter of the cross section of the limiting part, and the diameter of the cross section of the connecting part is smaller than the diameter of the cross section of the mounting part; the connecting part passes through the first Two through holes, one end is connected with the limiting member, and the other end is connected with the mounting member;

The gap between the limiting block and the connecting part is smaller than the width of the limiting part protruding from the connecting part.

To achieve the above object, an embodiment of the present invention further provides a device, the device includes a motor and any one of the above-mentioned motor brakes, and the motor supplies power to an electromagnet included in the motor brake.

The beneficial effects of the technical solutions provided by the embodiments of the present invention:

In the motor brake and equipment provided by the embodiment of the present invention, the brake pad adopts a polygonal star structure. Within the circumscribed circle of , for the brake pad with a polygonal star structure, the limit block can be located between the two corners of the brake pad, thereby limiting the axial rotation of the brake pad along with the extension shaft of the motor to achieve the purpose of braking. Compared with the circular brake pads, the brake pads of the polygonal star structure greatly reduce the weight of the brake pads. In addition, the limit block that restricts the axial rotation of the brake pad along with the extension shaft of the motor is also greatly reduced in weight compared to the holding brake. In addition, the limit block restricts the axial rotation of the brake pad with the motor extension shaft, and there is no need for a large contact area between the limit block and the brake pad to improve the stability and reliability of the brake. Large brake pads and stoppers. Based on the motor brake provided by the present invention, the light weight and miniaturization of the motor brake are realized.

Of course, it is not necessary for any product or method of the present invention to achieve all of the advantages described above at the same time.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a cross-sectional view of a motor brake provided by an embodiment of the present invention;

2 is a schematic structural diagram of a motor brake provided by an embodiment of the present invention;

Fig. 3 is a partial disassembly diagram of a motor brake provided by an embodiment of the present invention;

4 is a schematic structural diagram of a frame of a motor brake provided by an embodiment of the present invention;

5 is a cross-sectional view of a motor brake along the axis of the fifth through hole according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The motor brake using the disc structure is too bulky and heavy, which does not meet the current market demand for lightweight and miniaturization. In order to realize the lightweight and miniaturization of the motor brake, an embodiment of the present invention provides a motor brake. The brake pad in the motor brake adopts a polygonal star structure, and the distance between the limit block and the center of the first through hole is less than the radius of the circumcircle of the brake pad, that is, the limit block is located in the circumcircle of the brake pad. The structure of the brake pad, the limit block can be located between the two corners of the brake pad, thereby limiting the axial rotation of the brake pad along with the motor extension shaft to achieve the purpose of braking. Compared with the circular brake pads, the brake pads of the polygonal star structure greatly reduce the weight of the brake pads. In addition, the limit block that restricts the axial rotation of the brake pad along with the extension shaft of the motor is also greatly reduced in weight compared to the holding brake. In addition, the limit block restricts the axial rotation of the brake pad with the extension shaft of the motor, and there is no need for a large contact area between the limit block and the brake pad to improve the stability and reliability of the brake, that is to say, there is no need to over Large brake pads and stoppers. Based on the motor brake provided by the present invention, the weight reduction and miniaturization of the motor brake are realized. The motor brake provided by the embodiment of the present invention will be described below with reference to FIGS. 1-5 .

Referring to FIG. 1, FIG. 1 is a cross-sectional view of a motor brake provided by an embodiment of the present invention. The motor brake provided by an embodiment of the present invention includes: a frame 1, a brake pad 2, a motor extension shaft 3, an action lever 4, a limit Block 5 and electromagnet 6.

A first through hole 110 is formed at the center of the rack 1 , and a second through hole 120 is formed at the edge of the rack 1 , as shown in FIG. 4 . The first through hole 110 is used for fixing the motor extension shaft 3 , and the second through hole 120 is used for fixing the action rod 4 .

The brake pad 2 is of a polygonal star structure, and a third through hole 210 is formed in the center of the brake pad 2 .

The brake pad 2 may be of a five-pointed star structure, as shown in FIG. 2 and FIG. 3 , the brake pad 2 may also be of a six-pointed star structure or a seven-pointed star structure. This embodiment of the present invention does not limit this.

The motor extension shaft 3 passes through the first through hole 110 and is axially rotatably fixed on the frame 1 , and the motor extension shaft 3 passes through the third through hole 210 to fix the brake pad 2 on the motor extension shaft 3 .

The action rod 4 passes through the second through hole 120 and is fixed to the frame 1 movably along the axis direction.

Since the action lever 4 is fixed on the frame 1 through the second through hole 120 , the brake pad 2 is fixed on the motor extension shaft 3 , and the motor extension shaft 3 is fixed on the frame 1 through the first through hole 110 . 2. In the process of rotating with the motor extension shaft 3, it is not restricted or blocked by the action rod 4, then the distance from the center of the second through hole 120 to the center of the first through hole 110 is greater than the radius of the circumscribed circle of the brake pad, that is, the motor When the brake is assembled, the distance from the action rod 4 to the center of the third through hole 210 on the brake pad 2 is greater than the radius of the circumscribed circle of the brake pad.

The limit block 5 is installed on the side of the frame 1 close to the brake pad 2, and is installed between the first through hole 110 and the second through hole 120, and the distance between the limit block 5 and the center of the first through hole 110 is less than The radius of the circumcircle of the brake pad 2, the distance between the limit block 5 above the surface of the frame 1 is greater than the gap between the brake pad 2 and the frame 1, so as to limit the axial rotation of the brake pad 2 along with the motor extension shaft 3.

In the embodiment of the present invention, the limiting block 5 is located between the first through hole 110 and the second through hole 120 . In one embodiment, the frame 1 is provided with a limit slot, and the limit block 5 is installed in the limit slot. The limit block 5 is mainly used to limit the rotation of the brake pad 2 . Therefore, in order to ensure that the limit block 5 can block the brake pad 1, the limit block 5 is required to be installed on the side of the frame 1 close to the brake pad 2, and the distance from the limit block 5 to the center of the first through hole 110 should be less than The radius of the circumscribed circle of the brake pad 5, and the distance between the limit block 5 and the surface of the frame 1 is greater than the gap distance between the brake pad 2 and the surface of the frame 1. In this way, when one corner of the brake pad 2 of the polygonal star structure rotates to the position of the limit block 5, the limit block 5 can block the movement of the brake pad 2, that is, the limit block 5 is stuck on the two corners of the brake pad 2 In between, the brake pad 2 is restricted from rotating axially along with the motor extension shaft 3 . The weight and volume of the limit block 5 and the brake pad 2 of the polygonal star structure are smaller than the weight and volume of the circular brake pad and the holding brake in the prior art. Therefore, the motor brake provided by the embodiment of the present invention conforms to the light weight and small size of the market. ization needs.

The electromagnet 6 is installed on the side of the frame 1 away from the brake pad 2 . The electromagnet 6 generates a magnetic force when energized.

When the electromagnet 6 is energized, the action rod 4 moves along the axis direction under the action of the magnetic force provided by the electromagnet 6, that is, the action bar 4 moves along the axis direction of the second through hole 120 under the action of the magnetic force provided by the electromagnet 6, And drive the limit block 5 to move along the axis direction until the distance between the limit block 5 higher than the surface of the frame 1 is smaller than the gap distance between the brake pad 2 and the frame 1 . At this time, the limit block 5 is no longer stuck between the two corners of the brake pad 2, and the brake pad 2 is no longer restricted from axially rotating with the motor extension shaft 3, so that the brake pad 2 can rotate normally with the motor extension shaft 3. .

When the electromagnet 6 is powered off, the action lever 4 and the limit block 5 return to their original positions, that is, the distance between the limit block 5 above the surface of the frame 1 is greater than the gap between the brake pad 2 and the frame 1, so as to limit the The brake pad 2 rotates axially along with the extension shaft 3 of the motor.

In the embodiment of the present invention, the brake pad adopts a polygonal star structure, and the distance between the limit block and the center of the first through hole 110 is smaller than the radius of the circumscribed circle of the brake pad, that is, the limit block is located in the circumscribed circle of the brake pad. Using the brake pad with a polygonal star structure, the limit block can be located between the two corners of the brake pad, thereby restricting the axial rotation of the brake pad along with the extension shaft of the motor to achieve the purpose of braking. Compared with the circular brake pads, the brake pads of the polygonal star structure greatly reduce the weight of the brake pads. In addition, the limit block that restricts the axial rotation of the brake pad along with the extension shaft of the motor is also greatly reduced in weight compared to the holding brake. In addition, the limit block restricts the axial rotation of the brake pad with the extension shaft of the motor, and does not depend on the friction force, so there is no need to have a large contact area between the limit block and the brake pad to provide sufficient friction, and no need for friction. Oversized brake pads and stoppers. Based on the motor brake provided by the present invention, the light weight and miniaturization of the motor brake are realized.

In one embodiment, the motor extension shaft 3 may be a stepped shaft.

In the embodiment of the present invention, the motor extension shaft 3 can also change the type of the motor extension shaft according to the actual situation. For example, in order to facilitate processing and save costs, the motor extension shaft 3 can be a stepped solid shaft. For another example, in order to further reduce weight and save materials, a stepped hollow shaft can be used for the motor extension shaft 3 .

In one embodiment, the motor extension shaft 3 may include a first step extension shaft, a second step extension shaft and a third step extension shaft. The diameter of the first step extension shaft is larger than the diameter of the second step extension shaft, and the diameter of the second step extension shaft is larger than the diameter of the third step extension shaft. As shown in Figure 3.

The third stepped extension shaft of the motor extension shaft 3 passes through the first through hole 110 and is axially rotatably fixed on the frame 1 . The second step extension shaft passes through the third through hole 210 , so that the above-mentioned brake pad 2 is fixed on the motor extension shaft 3 . The first step extension shaft is used to limit the movement of the brake pad 2 along the axis direction of the motor extension shaft 3 , that is, to limit the brake pad 2 between the first step extension shaft and the frame 1 .

Since the diameter of the third step extension shaft is larger than the diameter of the second step extension shaft, the third step extension shaft can limit the axial displacement of the brake pad on the brake pad fixed on the second step extension shaft. In actual situations, the diameter of each stepped extension shaft in the motor extension shaft 3 can also be designed according to specific requirements.

In the embodiment of the present invention, the motor extension shaft 3 may further include 4 or 5 stepped extension shafts, and the specific number of step extension shafts included in the motor extension shaft 3 can be set according to specific requirements.

In one embodiment, the action rod 4 may include: a limiting part, a mounting part and a connecting part;

The limiting member is located on the side of the frame 1 close to the brake pad 2 , and the mounting member is located on the side of the frame 1 away from the brake pad 2 . In order to utilize the magnetic force provided by the electromagnet 6 to the maximum extent, the electromagnet 6 is installed around the installation part. The diameter of the cross-sectional surface of the connecting part is smaller than the diameter of the cross-sectional surface of the limiting part, and the diameter of the cross-sectional surface of the connecting part is smaller than the diameter of the cross-sectional surface of the mounting part; the connecting part passes through the second through hole 120, and one end of the connecting part is connected to the limiting part, The other end of the connecting part is connected with the mounting part. The gap between the limiting block 5 and the connecting part is smaller than the width of the limiting part protruding from the connecting part. In this way, when the electromagnet 6 is energized, the limiting component can drive the limiting block 5 to move.

The connecting member in the above-mentioned action rod is axially movably fixed on the frame through the above-mentioned second through hole 120. The above-mentioned action rod is mainly used to limit the movement of the above-mentioned limit block 5, and is specifically used for: when the action rod is installed When the electromagnet installed around the component is energized, the electromagnet will generate a magnetic force, and the above-mentioned installation component will move axially under the action of the magnetic force, thereby driving the above-mentioned connecting component and limit component to produce the same axial movement. The distance to the center of the limiting member is less than the radius of the cross-section of the limiting member, and the limiting member will drive the above-mentioned limit block 5 to move until the height of the limit block 5 above the surface of the frame 1 is smaller than the above-mentioned brake pad 2 and the machine. Gap distance between racks 1. When the height of the limit block 5 above the surface of the frame 1 is smaller than the gap distance between the brake pad 2 and the frame 1, the limit block will no longer block the brake pad 2, and the brake pad can be powered on. Free rotation with the motor extension shaft.

As shown in Figure 1, the end of the above-mentioned mounting part is equipped with a limiting device. The above-mentioned limiting device is composed of a round table and a hollow barrel. The round table has two end faces. Because the diameter of the hollow cylinder is smaller than the diameter of the end face with the larger diameter of the circular truncated cone, when the mounting part moves axially, it drives the above-mentioned circular truncated to move axially. The displacement of the truncated cone is limited, and in this case, the axial displacement of the mounting member (ie, the actuating rod) is limited.

In one embodiment, the brake motor may further include a pin 11, and one end of the limit block 5 is provided with a fourth through hole. As shown in FIG. 5, the frame 1 is provided with a blind hole 130 and a fifth through hole 140. The axes of the hole 130 and the fifth through hole 140 are on the same straight line, and the above-mentioned pin 11 passes through the fifth through hole 140 and the fourth through hole in turn, and is inserted into the blind hole 130, so that the above-mentioned limit block 5 is connected to the frame 1 ; The pin 11 and the fifth through hole 140 can adopt an interference fit, and the pin 11 and the fourth through hole can adopt a clearance fit.

The end of the limit block 5 connected to the frame 1 is lower than the surface of the frame 1 close to the brake pad 2. In this way, it is avoided that the limit block 5 is always in the limit of the brake pad because the end of the limit block 5 connected to the frame 1 cannot move. 2. The state of axial rotation with the motor extension shaft 3.

The distance between the other end of the limiting block 5 (ie the end not connected with the frame 1 ) is higher than the surface of the frame 1 than the gap between the brake pad 2 and the frame 1 . This end of the limit block 5 is the movable end. When the electromagnet 6 is not energized, the end of the limit block 5 that is not connected to the frame 1 restricts the axial rotation of the brake pad 2 along with the motor extension shaft 3; when the electromagnet 6 is energized After that, the action rod 4 moves along the axis direction under the action of the magnetic force provided by the electromagnet 6, and drives the end of the limit block 5 that is not connected with the frame 1 to move until the brake pad 2 is no longer restricted to follow the motor extension shaft 3 Axial rotation.

One end of the limit block 5 has a fourth through hole, and is connected to the frame 1 through the fourth through hole using a pin 11. Since one end of the limit block 5 is fixed by the pin 11, the fixed end of the limit block 5 cannot be used. Displacement occurs in the direction of the axis, but because the pin 11 and the fourth through hole adopt clearance fit, one end of the limit block 5 can rotate around the pin.

In one embodiment, the motor brake may include a limit block 5 . At this time, the direction from one end of the limit block 5 connected to the frame 1 to the other end of the limit block 5 is opposite to the rotation direction of the brake pad when the motor brake works normally.

In another embodiment, the motor brake may include two limit blocks 5 . At this time, the ends of the two limit blocks 5 connected to the rack 1 are far away, and the ends of the two limit blocks 5 that are not connected to the rack 1 are close to each other. In one example, there is a gap between the ends of the two limiting blocks 5 that are not connected to the rack 1 . as shown in picture 2.

Since the end of the limit block 5 connected to the frame 1 is lower than the surface of the frame 1 close to the brake pad 2, when the brake pad 2 moves in the direction from one end of the limit block 5 connected to the frame 1 to the other end of the limit block 5 , the brake pad 2 will not be blocked by the limit block 5. Therefore, when the brake pad 2 can rotate clockwise with the motor extension shaft 3 or rotate reversely with the motor extension shaft 3, two can be installed on the motor brake. The limit block 5 achieves the effect of two-way limit.

In the embodiment of the present invention, the number of the installed limit blocks 5 can be selected according to actual requirements.

In one embodiment, the above-mentioned motor brake may further include a spring 7 , and the spring 7 is installed between the limit block 5 and the frame 1 .

When the electromagnet 6 is energized, the action rod 4 moves in the axial direction under the action of the magnetic force provided by the electromagnet 6, and drives the limit block 5 to move, so that the limit block 5 compresses the spring 7, and the spring 7 is in a compressed state.

When the electromagnet 6 is not energized, the limit block 5 moves under the action of the elastic force provided by the spring 7 until the distance between the limit block 5 and the surface of the frame 1 is greater than the gap between the brake pad 2 and the frame 1 , the spring 7 returns to its original state.

The above-mentioned spring 7 is mainly used to provide elastic force, so that the limit block 5 moves under the action of the elastic force, so that the distance between the limit block 5 and the surface of the frame 1 is greater than the gap between the brake pad 2 and the frame 1 . In this way, when the brake pad 2 rotates to the position of the limit block 5, it will be blocked by the end of the limit block 5 which is higher than the surface of the frame 1, and the movement will be stopped.

There are various ways for the above-mentioned spring 7 to be fixed between the limiting block 5 and the frame 1 . For example, in order to make processing more convenient, one end of the spring 7 can be fixed on the frame 1 by welding or the like, and the other end of the spring 7 can be left untreated; one end can also be fixed on the limit block 5 by welding without opening the fourth One end of the through hole and the other end of the spring 7 are left untreated. In order to ensure the stability of the spring, one end of the spring 7 can also be fixedly connected to the frame 1, and the other end of the spring 7 can be fixedly connected to the end of the limit block 5 without a through hole.

In one embodiment, the motor brake may further include a wave washer 8 , which is sleeved on the motor extension shaft 3 and located between the brake pad 2 and the first stepped shaft of the motor extension shaft 3 .

In one embodiment, the motor brake further includes a floating retaining ring 9 , the floating retaining ring 9 is sleeved on the motor extension shaft 3 and installed between the wave washer 8 and the brake pad 2 .

The above-mentioned wave washer 8 is installed between the brake pad 2 and the first stepped shaft of the motor extension shaft 3, and the wave washer 8 has good elasticity. impact force. The wave washer 8 will generate a pressing force on the floating retaining ring 9, so that the floating retaining ring 9 is close to the brake pad 2, so that when the electromagnet 6 is energized, the braking pad 2 and the floating retaining ring 9 rotate with the motor extension shaft 3. The floating retaining ring 9 can not only limit the axial displacement of the brake pad 2 , but also separate the wave washer 9 from the brake pad 2 to prevent friction between the brake pad 2 and the wave washer 8 in direct contact, thereby causing wear to the wave washer 9 .

When the electromagnet 6 is not energized, the limit block 5 moves under the action of the elastic force provided by the above-mentioned spring 7 until the distance between the limit block 5 and the surface of the frame 1 is greater than the distance between the brake pad 2 and the frame 1 so that when the brake pad 2 moves to the position of the limit block 5, the brake pad 2 is blocked by the limit block 5 and stops moving, but at this time, the motor extension shaft 3 and the brake pad 2 are still under the action of inertia. With residual kinetic energy, at this time, the brake pad 2 and the floating retaining ring 8 will have a relative displacement, and the work done by the friction force generated between the brake pad 2 and the floating retaining ring 8 will cancel the above residual kinetic energy, so that the braking is more efficient. Fast and smooth.

In one embodiment, the motor brake may further include a fixed washer 10 , and the fixed retaining ring 10 is sleeved on the third stepped extension shaft of the motor extension shaft 3 and is located on the side of the brake pad 2 away from the floating retaining ring 9 .

The fixing washer 10 is installed on the side of the brake pad 2 away from the floating retaining ring 9 , and is mainly used to limit the axial displacement of the brake pad 2 . Avoid the wear of the brake pad 2 caused by the shaking of the brake pad 2 during the rotation process.

The embodiment of the present invention also provides a device, including a motor and any one of the above-mentioned motor brakes; wherein the motor supplies power to the electromagnet 6 . The above equipment can be a car, or a series of mechanical equipment such as lathes and milling machines.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

Each embodiment in this specification is described in a related manner, and the same and similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from other embodiments. The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims (11)

1. a motor brake, is characterized in that, described motor brake comprises: a frame (1), a first through hole (110) is formed at the center position of the frame (1), and a second through hole (120) is formed at the edge position of the frame (1); A brake pad (2), the brake pad (2) is a polygonal star structure, and the radius of the circumscribed circle of the brake pad (2) is smaller than the center of the first through hole (110) and the second through hole ( 120) the distance between the centers, the center position of the brake pad (2) is provided with a third through hole (210); A motor extension shaft (3), the motor extension shaft (3) passes through the first through hole (110) and is axially rotatably fixed on the frame (1), the motor extension shaft (3) ) through the third through hole (210), so that the brake pad (2) is fixed on the motor extension shaft (3); an action lever (4), the action lever (4) passes through the second through hole (120) and is movably fixed on the frame (1) along the axis direction; A limit block (5), the limit block (5) is mounted on the side of the frame (1) close to the brake pad (2), and is mounted on the first through hole (110) and all the Between the second through holes (120), the distance between the limit block (5) and the center of the first through hole (110) is less than the radius of the circumcircle of the brake pad (2), the limit The distance between the position block (5) above the surface of the frame (1) is greater than the gap between the brake pad (2) and the frame (1), so as to limit the brake pad (2) to follow rotates axially with the motor extension shaft (3); an electromagnet (6), the electromagnet (6) is mounted on the side of the frame (1) away from the brake pad (2); When the electromagnet (6) is energized, the action rod (4) moves along the axis direction under the action of the magnetic force provided by the electromagnet (6), and drives the limit block (5) to move along the axis direction , until the distance between the limit block (5) higher than the surface of the frame (1) is smaller than the gap distance between the brake pad (2) and the frame (1). 2. The motor brake according to claim 1, characterized in that, the motor brake further comprises a spring (7), and the spring (7) is installed on the limit block (5) and the frame (1). ), provide elastic force for the reset of the limit block; When the electromagnet (6) is energized, the action rod (4) moves along the axis direction under the action of the magnetic force provided by the electromagnet (6), and drives the limit block (5) to move, thereby making all the The limiting block (5) compresses the spring (7), and the spring (7) is in a compressed state; When the electromagnet (6) is not energized, the limit block (5) moves under the action of the elastic force provided by the spring (7) until the limit block (5) is higher than the frame (1) The distance between the surfaces is greater than the gap between the brake pad (2) and the frame (1), and the spring (7) returns to its original state. 3 . The motor brake according to claim 1 , wherein the motor extension shaft ( 3 ) is a stepped shaft. 4 . 4. The motor brake according to claim 3, wherein the motor extension shaft (3) comprises a first step extension shaft, a second step extension shaft and a third step extension shaft; The diameter of the first step extension shaft is larger than the diameter of the second step extension shaft, and the diameter of the second step extension shaft is larger than the diameter of the third step extension shaft; The third stepped extension shaft passes through the first through hole (110) and is axially rotatably fixed on the frame (1), and the second stepped extension shaft passes through the third through hole (210), so that the brake pad (2) is fixed on the motor extension shaft (3), and the first step extension shaft is used to restrict the brake pad (2) along the motor extension shaft (3) ) in the direction of the axis. 5 . The motor brake according to claim 4 , wherein the motor brake further comprises a wave washer ( 8 ), and the wave washer ( 8 ) is sleeved on the motor extension shaft ( 3 ) and installed. 6 . between the brake pad (2) and the first step extension shaft. 6. The motor brake according to claim 5, characterized in that, the motor brake further comprises a floating retaining ring (9), and the floating retaining ring (9) is sleeved on the motor extension shaft (3), and is located between the brake pad (2) and the wave washer (8). 7. The motor brake according to claim 6, characterized in that, the motor brake further comprises a fixed retaining ring (10), and the fixed retaining ring (10) is sleeved on the motor extension shaft (3), and is located on the side of the brake pad (2) away from the floating retaining ring (9). 8. The motor brake according to claim 1, wherein the motor brake further comprises a pin (11); One end of the limiting block (5) is provided with a fourth through hole, the frame (1) is provided with a blind hole (130) and a fifth through hole (140), the blind hole (130) and the first through hole (140) are provided on the frame (1). The axes of the five through holes (140) are on the same straight line; The pin (11) passes through the fifth through hole (140) and the fourth through hole, and is inserted into the blind hole (130), so that the limiting block (5) is connected to the frame ( 1) connection; the pin (11) is an interference fit with the fifth through hole (140), and the pin (11) is a clearance fit with the fourth through hole; One end of the limit block (5) connected to the frame (1) is lower than the surface of the frame (1) close to the brake pad (2), and the other end of the limit block (5) is higher The distance between the surfaces of the frame (1) is greater than the gap between the brake pads (2) and the frame (1); When the electromagnet (6) is energized, the action rod (4) moves along the axis direction under the action of the magnetic force provided by the electromagnet (6), and drives the unconnected parts of the limiting block (5). One end of the frame (1) is moved. 9. The motor brake according to claim 8, characterized in that, there are two limit blocks (5), one end of the two limit blocks (5) connected to the frame (1) is far away, and two The end of the limiting block (5) that is not connected to the frame (1) is close to each other. 10. The motor brake according to claim 1, wherein the action lever (4) comprises: a limiting component, the limiting component is located on the side of the frame (1) close to the brake pad (2); an installation part, the electromagnet (6) is installed around the installation part; the installation part is located on the side of the frame (1) away from the brake pad (2); a connecting part, the diameter of the cross section of the connecting part is smaller than the diameter of the cross section of the limiting part, and the diameter of the cross section of the connecting part is smaller than the diameter of the cross section of the mounting part; the connecting part passes through the first Two through holes (120), one end is connected with the limiting member, and the other end is connected with the mounting member; The gap between the limiting block (5) and the connecting member is smaller than the width of the limiting member protruding from the connecting member. 11. A device, characterized in that it comprises a motor and the motor brake according to any one of claims 1 to 10; the motor supplies power to the electromagnet (6).

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