CN218761062U - Two-stage braking electromagnetic brake and motor device - Google Patents

Abstract

The utility model provides a doublestage braking electromagnetic braking ware and motor device, doublestage braking electromagnetic braking ware includes: the brake comprises a brake stator, a first armature, a second armature, a friction plate, a first elastic structure, a second elastic structure and a magnetic structure; the first elastic structure can provide elastic force for the first armature, the second elastic structure can provide elastic force for the second armature, and the magnetic structure generates magnetic force between the brake stators; when the stator of the brake is powered off, the second armature can be driven by the second elastic structure to be attached to the friction plate to form primary braking, a gap is formed between the second armature and the stator of the brake, and when the gap is larger than or equal to a preset distance, the magnetic force generated by the magnetic structure is smaller than the elastic force of the first elastic structure to form secondary braking. According to the utility model discloses can solve traditional stopper normal operating process spare part wearing and tearing and can lead to the clearance crescent, lead to the problem of braking torque decay.

Description

Double-stage braking electromagnetic brake and motor device

Technical Field

The utility model relates to a stopper technical field, concretely relates to doublestage braking electromagnetic braking ware and motor device.

Background

The electromagnetic brake is an important basic component, integrates mechanical and electrical functions, and is mainly used for precise control and braking of a rotating mechanism (such as a motor device and the like).

When the connected shaft has a rotation intention, friction force for stopping rotation is generated between the friction plate, the armature and the limiting plate, namely brake braking force, and the brake can also be used for emergency deceleration braking; correspondingly, when the brake is electrified, a coil arranged in a groove of the stator core is electrified to generate a magnetic field so as to attract the armature (electromagnetic force) to overcome the spring force to generate axial displacement, the gap is transferred between the armature and the limiting plate, the friction plate is released, and a shaft connected with the friction plate rotates.

The mechanical motion and clearance related part of the traditional brake comprises a stator iron core, an armature, a friction plate, a column sleeve, a limiting plate and a screw. The limiting plate penetrates through the column sleeve by a screw and is fixed on the stator iron core; the armature and the friction plate are horizontally arranged between the limiting plate and the stator iron core, a groove is formed in the armature for a column sleeve to penetrate through, the column sleeve plays a motion guiding role on the armature, and the friction plate is arranged between the limiting plate and the armature. In conclusion, the clearance = distance from the end face of the limiting plate close to the friction plate to the end face of the stator core close to the armature-armature thickness-friction plate thickness. Under the normal operation condition of the brake, the abrasion of all parts can be caused by the motion impact of the armature during power-on and power-off and the violent friction of the friction plate clamped with the armature and the limiting plate during emergency braking, and further the clearance is increased. The normal operation of the brake needs to ensure that the gap is within a certain range, when the gap is increased, the magnetic resistance between the stator and the armature is increased, the response time of the brake for electrifying and attracting the armature is increased, and when the gap is too large, the situation that the response is too slow or even the armature cannot be attracted when the brake is electrified is easily caused; and the increase of the clearance can also lead to the reduction of the compression amount of the spring, namely the reduction of the spring force, further lead to the reduction of the braking force and can not maintain the original static friction torque and the emergency braking time.

Because the wearing and tearing of stopper normal operating process spare part among the prior art can lead to the clearance crescent, leads to technical problem such as braking torque decay, consequently the utility model discloses research designs a doublestage braking electromagnetic braking ware and motor device.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the stopper among the prior art and having the wearing and tearing of normal operating process spare part can lead to the clearance crescent, leads to the defect of braking torque decay to a doublestage braking electromagnetic braking ware and motor device are provided.

In order to solve the above problem, the utility model provides a doublestage braking electromagnetic brake, it includes:

the brake comprises a brake stator, a first armature, a second armature, a friction plate, a first elastic structure, a second elastic structure and a magnetic structure, wherein the first armature and the second armature are located between the brake stator and the friction plate in the axial direction of the brake stator; the first elastic structure can provide elastic force to the first armature, the second elastic structure can provide elastic force to the second armature, and the magnetic structure can generate magnetic force between the first armature and the brake stator;

when the brake stator is powered off, the second armature can be driven by the second elastic structure to be attached to the friction plate to form primary braking, a gap is formed between the second armature and the brake stator, when the gap is larger than or equal to a preset distance, the magnetic force between the first armature and the brake stator generated by the magnetic structure is smaller than the elastic force of the first elastic structure, and the elastic force of the first elastic structure drives the first armature to move to be attached to the friction plate to form secondary braking.

In some embodiments, the first armature and the second armature are both ring-shaped structures, the first armature is sleeved on the radial outer periphery of the second armature, the first elastic structure is arranged on the brake stator and provides elastic force only for the first armature, the second elastic structure is arranged on the brake stator and provides elastic force only for the second armature, and the magnetic structure is arranged on the first armature.

In some embodiments, when the brake stator is energized, the primary magnetic field generated by the brake stator can be looped through the brake stator, the first armature, and the second armature, and the secondary magnetic field generated by the magnetic structure can also be looped through the brake stator, the first armature, and the second armature, when both the first armature and the second armature are engaged with the brake stator.

In some embodiments, when the brake stator is powered off, the second armature has no magnetic force with the brake stator, the second armature is pushed out by the second elastic structure to form the gap with the brake stator, the secondary magnetic field generated by the magnetic structure forms a loop through the brake stator, the first armature and the second armature and the gap, and when the gap is smaller than a preset distance, the magnetic force generated by the magnetic structure between the first armature and the brake stator is larger than the elastic force of the first elastic structure, and the magnetic force generated by the magnetic structure controls the first armature to continue to be attached to the brake stator; at the moment, the second armature iron is not attached to the brake stator, and primary braking is formed.

In some embodiments, when the brake stator is powered off, the secondary magnetic field generated by the magnetic structure forms a loop via the brake stator, the first armature and the second armature, and the gap between the second armature and the brake stator is greater than or equal to a preset distance, the magnetic force generated by the magnetic structure between the first armature and the brake stator is less than the elastic force of the first elastic structure, and the first armature is pushed out by the first elastic structure to form a secondary brake.

In some embodiments, after the electromagnetic brake forms a primary brake or a secondary brake, and when the brake stator is energized again, the brake stator generates a primary magnetic field that can be looped through the brake stator, air, the first armature, the second armature, and air, and the magnetic structure generates a secondary magnetic field that is looped through the first armature and the second armature and air, the primary magnetic field and the secondary magnetic field together controlling the first armature and the second armature to both move toward the brake stator into engagement with the brake stator.

In some embodiments, the magnetic force generated by the brake stator is greater than the elastic force of the second elastic structure, the magnetic force generated by the brake stator is greater than the elastic force of the first elastic structure, when the gap is smaller than a preset distance, the magnetic force generated by the magnetic structure is greater than the elastic force of the first elastic structure, and when the gap is greater than or equal to the preset distance, the magnetic force generated by the magnetic structure is less than the elastic force of the first elastic structure.

In some embodiments, the radial outer peripheral wall of the second armature is in clearance fit with the radial inner peripheral wall of the first armature, and the clearance amount is less than or equal to 0.1mm.

In some embodiments, a first accommodating hole is formed in the brake stator, the first accommodating hole extends from the interior of the brake stator to a first axial end face of the brake stator, the first axial end face is opposite to the second armature, the inner diameter of the second armature is smaller than that of the first accommodating hole, the outer diameter of the second armature is larger than that of the first accommodating hole, the second elastic structure is arranged in the first accommodating hole, one end of the second elastic structure abuts against the groove bottom of the first accommodating hole, and the other end of the second elastic structure abuts against the second armature so as to provide elastic thrust for the second armature.

In some embodiments, the first receiving hole is a cylindrical hole having a center line coinciding with a center axis of the brake stator, the center line of the center hole of the second armature coincides with the center axis, and the second resilient structure is a spring.

In some embodiments, the brake stator is further provided with a second accommodating hole extending from the inside of the brake stator to the first axial end face of the brake stator, the second accommodating hole is opposite to a solid part between the radial inner periphery and the radial outer periphery of the first armature, one end of the first elastic structure abuts against the groove bottom of the second accommodating hole, and the other end of the first elastic structure is in contact with the first armature, so as to be capable of providing elastic thrust to the first armature.

In some embodiments, the first armature is a split structure and includes a first armature and a second armature, the first armature is spliced with the second armature, and the magnetic structure is disposed between the first armature and the second armature.

In some embodiments, the first armature and the second armature are arranged in a manner of being connected in the axial direction of the first armature, a first groove is arranged at an axial end face, facing the second armature, of the first armature, a second groove is arranged at an axial end face, facing the first armature, of the second armature, the first groove and the second groove are oppositely connected to form a groove for accommodating the magnetic structure, and part of the magnetic structure is arranged in the first groove, and the other part of the magnetic structure is arranged in the second groove.

In some embodiments, the first and second recesses are both annular groove structures, and the magnetic structure is also an annular structure; the magnetic structure is a permanent magnet; the first elastic structure is a spring.

In some embodiments, the first armature and the second armature are connected through a screw or a bolt, or the first armature and the second armature are connected through bonding, or the first armature and the magnetic structure are integrally formed with the second armature.

In some embodiments, the brake stator further defines a coil slot extending axially from the interior of the brake stator to the first axial end face, the coil slot having a coil disposed therein, the coil further being connected to a power source external to the brake stator by an outgoing line.

In some embodiments, the friction plate is an annular structure, and an outer diameter of the friction plate is greater than an inner diameter of the first armature and less than an outer diameter of the first armature, and an inner diameter of the friction plate is less than an outer diameter of the second armature and greater than an inner diameter of the second armature; the friction plate comprises a third axial end surface and a fourth axial end surface which are positioned at the two axial ends of the friction plate; when only the second armature is connected with the third axial end face of the friction plate, primary braking is formed on the friction plate; when the second armature and the first armature are both connected with the third axial end face of the friction plate, a secondary brake is formed on the friction plate.

In some embodiments, the brake device further comprises a baffle plate and a square wheel, wherein the baffle plate is arranged at the fourth axial end face of the friction plate, the square wheel is arranged on the radial inner periphery of the friction plate in a penetrating mode, the baffle plate is of an annular structure, the square wheel is located on the radial inner side of the baffle plate, the radial outer peripheral wall of the square wheel is connected with the radial inner peripheral wall of the friction plate, the friction plate is used for conducting friction braking on the square wheel, and the baffle plate is used for limiting the axial movement of the friction plate.

The utility model also provides a motor device, it includes aforementioned doublestage braking electromagnetic braking ware.

The utility model provides a pair of doublestage braking electromagnetic braking ware and motor device have following beneficial effect:

the utility model discloses a set up armature into the structure of the second armature and the first armature of components of a whole that can function independently structure, and set up first and second elastic construction on the stopper stator respectively, and be provided with the magnetic structure on the first armature, can form the magnetic field and form the additional magnetic force between stopper stator and the first armature through the magnetic structure, and do not form the additional magnetic force between second armature and the stopper stator (or the magnetic force who forms is very little or approach to 0), thereby make the second armature directly be released by the second elastic construction and form the one-level braking with the friction disc laminating after the stopper stator cuts off the power supply, if the clearance between second armature and the stopper stator is more than or equal to the predetermined distance then the magnetic force that the magnetic structure provided is not enough to overcome the elastic force of first elastic construction, then first armature is released by the first elastic construction and forms the second grade braking with the friction disc combination, can increase the contact area between independent second armature and the friction disc through first armature, thereby effectively increase friction braking torque (moment), effectively solve the normal operating process spare part of traditional stopper and can lead to the clearance to increase gradually, lead to the problem of braking moment attenuation, utilize the characteristics between stopper and the armature, namely increase the two-stage braking function, the magnetic circuit braking function, replenish the magnetic circuit braking function after the second brake fails; the safety of the whole brake product in the operation process is ensured. The double-stage brake structure can be used for reminding engineering personnel of needing to replace the brake in time.

Drawings

FIG. 1a is a view showing the configuration of a conventional brake in the prior art;

FIG. 1b is an installed sectional view of the conventional brake of FIG. 1 a;

fig. 2 is a cross-sectional structural view of the two-stage braking electromagnetic brake of the present invention;

fig. 3 is a magnetic field sectional view of the two-stage braking electromagnetic brake of the present invention in the coil energized state;

fig. 4 is a partial sectional view of the two-stage braking electromagnetic brake of the present invention during one-stage braking;

fig. 5 is a partial cross-sectional view of the two-stage braking electromagnetic brake of the present invention at the beginning of the two-stage braking operation;

fig. 6 is a partial sectional view of the two-stage braking electromagnetic brake according to the present invention, in which two-stage braking is performed.

The reference numerals are represented as:

1. a brake stator; 2. a coil; 3. a friction plate; 4. a baffle plate; 5. a square wheel; 6. an armature; 61. a first armature; 611. a first armature I; 612. a second first armature; 62. a second armature; 7. a spring; 71. a first elastic structure; 72. a second elastic structure; 8. a column sleeve; 9. an outgoing line; 10. a motor shaft; 11. a magnetic structure; 12. a first accommodation hole; 13. a first axial end face; 14. a second accommodation hole; 15. a coil slot; 100. a gap; 200. a main magnetic field; 300. a secondary magnetic field.

Detailed Description

Referring to fig. 1a-1b, when the conventional brake is de-energized: the coil 2 is powered off, the electromagnetic force acting on the brake stator 1 disappears, the compressed spring 7 needs to be restored to the original size, the compressed spring 7 releases the spring force and acts on the armature 6 to push the armature 6 to move towards the baffle 4, and the current armature 6 and the baffle 4 clamp the friction plate 3. The friction plate 3 generates friction torque due to friction between both surfaces thereof under the action of force. Friction torque = braking torque, at this time, the square wheel 5 gap-linked with the friction plate 3 stops rotating, the motor shaft 10 stops rotating, and the motor is braked;

the friction plate 3 is abraded due to the fact that the brake is frequently braked under bad braking conditions, such as emergency braking conditions, and the brake is frequently braked each time. The size of the friction plate 3 is reduced, the whole clearance of the brake is increased, when the size exceeds 0.5 limit size, the armature 6 cannot be attracted to one side of the brake stator 1 by the electromagnetic force generated by the brake stator 1, and the brake fails; meanwhile, due to the over-stroke release of the spring 7, the spring force generated by the spring 7 is insufficient, and the shortage of braking force is indirectly caused; at the moment, the position of the mechanical arm/mechanical arm is braked and positioned by a brake, and the insufficient torque can cause inaccurate positioning position and even serious swing arm/arm drop and other phenomena; there is a considerable risk to the operator/equipment/product.

As shown in fig. 2-6, the utility model provides a two-stage braking electromagnetic brake, it includes:

the brake comprises a brake stator 1, a first armature 61, a second armature 62, a friction plate 3, a first elastic structure 71, a second elastic structure 72 and a magnetic structure 11, wherein the first armature 61 and the second armature 62 are located between the brake stator 1 and the friction plate 3 in the axial direction of the brake stator 1; the first elastic structure 71 can provide an elastic force to the first armature 61, the second elastic structure 72 can provide an elastic force to the second armature 62, and the magnetic structure 11 can generate a magnetic force (preferably a magnetic attraction force) between the first armature 61 and the brake stator 1;

when the brake stator 1 is powered off, the second armature 62 can be driven by the second elastic structure 72 to be attached to the friction plate 3 to form primary braking, at this time, a gap 100 is formed between the second armature 62 and the brake stator 1, when the gap 100 is greater than or equal to a preset distance, the magnetic force between the first armature 61 and the brake stator 1 generated by the magnetic structure 11 is smaller than the elastic force of the first elastic structure 71, and the elastic force of the first elastic structure 71 drives the first armature 61 to move to be attached to the friction plate 3 to form secondary braking.

The utility model discloses a set up armature into the structure of the second armature and the first armature of components of a whole that can function independently structure, and set up first and second elastic construction on the stopper stator respectively, and be provided with magnetic structure on the first armature, can form the magnetic field and form the additional magnetic force between stopper stator and the first armature through magnetic structure, and do not form additional magnetic force between second armature and the stopper stator, thereby make the second armature directly by the second elastic construction release and form the one-level braking with the friction disc laminating after the stopper stator cuts off the power supply, if the clearance between second armature and the stopper stator is more than or equal to the predetermined distance then the magnetic force that magnetic structure provided is not enough to overcome the elastic force of first elastic construction, then first armature is released by first elastic construction and combines to form the second grade braking with the friction disc, can increase the area of contact between independent second armature and the friction disc through first armature, thereby effectively increase friction braking torque (moment of torsion), effectively solve the problem that the normal operation process part wearing and tearing of traditional stopper can lead to the clearance to increase gradually, lead to the problem of braking moment attenuation, utilize the stopper between stator and the characteristics of double-stage braking, increase the double-stage braking function, the one-level braking function, the supplementary moment of torsion, the second-stage braking function after the secondary braking fails; the safety of the whole brake product in the operation process is ensured. The double-stage brake structure can be used for reminding engineering personnel of needing to replace the brake in time.

In some embodiments, the first armature 61 and the second armature 62 are both ring-shaped structures, and the first armature 61 is sleeved on the radial outer periphery of the second armature 62 (the first armature is preferably an outer armature, and the second armature is preferably an inner armature), the first elastic structure 71 is disposed on the brake stator 1 and provides an elastic force only for the first armature 61, the second elastic structure 72 is disposed on the brake stator 1 and provides an elastic force only for the second armature 62, and the magnetic structure 11 is disposed on the first armature 61.

This is the utility model discloses a first, the preferred structural style and the relative position form of second armature to and the setting position of first and second elastic construction and the setting position of magnetic structure, can provide the elastic force to first armature through first elastic construction, and the second elastic construction provides the elastic force to second armature, and the magnetic structure only provides the magnetic force to first armature as far as possible, and second armature receives the magnetic force of magnetic structure less or approaches to 0.

The magnetic structure can be arranged on the outer armature and can also be arranged on the inner armature instead, at the moment, the outer armature forms a first-stage brake, and the inner armature forms a second-stage brake.

The utility model relates to a doublestage braking electromagnetic braking ware need not external control module, can help the engineer to judge whether the stopper work is normal under the circumstances of guaranteeing the braking moment non-attenuation, increases to surpassing when setting for the scope in the clearance, still can guarantee the stopper security. The utility model discloses an improvement point lies in:

1. the utility model relates to a two-stage braking structure, through the two-stage braking structure of first armature and second armature, utilize the magnetic circuit characteristics between stopper stator and the armature, increase two-stage braking function, namely after the one-level braking became invalid, start two-stage braking function, the replenishment moment of torsion realizes that the friction disc is under the state that leads to and the clearance between the armature increases under wearing and tearing, the function that braking moment does not attenuate; the safety of the whole brake product in the operation process is ensured. Especially, the device plays an important role in certain occasions where the device cannot be operated discontinuously.

2. The effect of reminding engineering personnel of replacing the brake in time is realized through the double-stage braking function; (explain: the first brake of the second armature has a sound on the friction plate through the impact pressure of the spring; (alerting the operator that the friction plate is thinned for the replacement, or that the friction plate, damper and armature are replaced, or that the entire brake is replaced).

The utility model provides a following technical problem:

1. the abrasion of parts in the normal operation process of the traditional brake can cause the clearance to be gradually increased, and the brake torque is attenuated;

2. the traditional brake has no function of increasing torque; after the torque of the brake is attenuated, the brake still works until being scrapped; this operational behavior is harmful to personnel/equipment/products;

3. the traditional brake can not assist to prompt engineering personnel to replace the brake, and the function is not provided.

In some embodiments, when the brake stator 1 is energized, the generated main magnetic field 200 can form a loop via the brake stator 1, the first armature 61 and the second armature 62, and the secondary magnetic field 300 generated by the magnetic structure 11 also forms a loop via the brake stator 1, the first armature 61 and the second armature 62, when the first armature 61 and the second armature 62 are both attached to the brake stator 1. This is the utility model discloses an optimal structure form when stopper stator circular telegram, its main field 200 that produces when being the circular telegram of stopper stator promptly can be through the stopper, first armature and second armature form the return circuit, provide magnetic force to first armature and second armature simultaneously, overcome the elastic force of second elastic construction and inhale to laminate with the stopper stator with second armature, first armature receives the auxiliary magnetic field 300 that main field 200 and magnetic construction provided and acts on simultaneously and overcome the elastic force of first elastic construction and inhale to laminate with the stopper stator, first and second armature all do not contact with the friction disc this moment, the friction disc rotates with square wheel and motor shaft together.

When the coils of the two-stage brake are electrified, based on the direction of a magnetic field generated by the coils 2 of the stator 1 of the brake, the magnetic field is superposed with a magnetic field generated by the annular magnetic steel (the magnetic structure 11), the attraction force generated by superposition is larger than the elastic force generated by the inner spring and the outer spring, and the first armature and the second armature are attracted. The friction plate 3 is in a release state, and the motor rotates freely.

In some embodiments, when the brake stator 1 is powered off, the second armature 62 has no magnetic force with the brake stator 1, the second armature 62 is pushed out by the second elastic structure 72 to form the gap 100 with the brake stator 1, the secondary magnetic field 300 generated by the magnetic structure 11 forms a loop via the brake stator 1, the first armature 61 and the second armature 62, and the gap 100, and when the gap 100 is smaller than a preset distance, the magnetic force generated by the magnetic structure 11 between the first armature 61 and the brake stator 1 is greater than the elastic force of the first elastic structure 71, and the magnetic force generated by the magnetic structure 11 controls the first armature 61 to continue to be attached to the brake stator 1; at this time, the second armature 62 is not attached to the brake stator 1, and primary braking is achieved.

This is the utility model discloses a preferred structural style under the circumstances that the brake stator outage back and interval distance between friction disc and the second armature are less, the brake stator outage then its main magnetic field 200 that provides disappears, the second armature receives the elastic thrust effect of second elastic construction and is released this moment, and then laminates with the friction disc and produces braking torque to the friction disc, prevents the friction disc rotation, produces the primary braking to the motor shaft; when the second armature is pushed out to enable the gap between the second armature and the brake stator to be smaller than a preset distance (because the second armature moves to be connected with the friction plate, the spacing distance between the friction plate and the second armature is equal to the gap), a secondary magnetic field generated by the magnetic structure can form a loop among the first armature, the second armature, the gap and the brake stator, but the magnetic resistance is smaller due to the smaller gap, so that the magnetic force between the first armature and the stator generated by the magnetic structure is larger, the elastic force of the first elastic structure can be effectively overcome, the first armature is continuously attracted to the stator, and only the second armature is attached to the friction plate to generate primary braking.

When the coil of the utility model is powered off (which becomes figure 4 under the condition that figure 3 is powered off), the attraction of the brake stator 1 disappears; the magnetic field generated by the first armature 61 is still present, part of the magnetic circuit passes through the second armature 62, the spring force generated by the outer spring (the first elastic structure 71) is less than the attraction force generated by the first armature 61, the outer spring is in a compressed state, and the gap between the first armature 61 and the stator =0; at this time, no magnetic field is generated in the second armature 62 (that is, the second armature does not have a magnetic structure therein, the second armature itself does not generate a magnetic field, and the magnetic force between the second armature and the stator, which is generated by the magnetic field generated by the first armature passing through the second armature, is small and approaches to 0), so that the attraction force of the second armature 62 to the brake stator 1 approaches to 0; the inner spring (the second elastic structure 72) generates a spring force to push the second armature 62 towards the baffle 4, so that the friction plates rub to generate a braking force, and a primary brake is formed.

In some embodiments, when the brake stator 1 is powered off, the secondary magnetic field 300 generated by the magnetic structure 11 forms a loop via the brake stator 1, the first armature 61 and the second armature 62, and the gap 100 between the second armature 62 and the brake stator 1 is greater than or equal to a preset distance, the magnetic force generated by the magnetic structure 11 between the first armature 61 and the brake stator 1 is smaller than the elastic force of the first elastic structure 71, and the first armature 61 is pushed out by the first elastic structure 71 to form a secondary brake.

This is the utility model discloses a preferred structural style under the circumstances that brake stator outage back and interval distance between friction disc and the second armature are great, brake stator outage then its main magnetic field 200 that provides disappears, and second armature receives the elastic thrust effect of second elastic construction and is released this moment, and then laminates with the friction disc and produces braking torque to the friction disc, prevents the friction disc rotation, produces the primary braking to the motor shaft; when the second armature is pushed out to enable the gap between the second armature and the brake stator to be larger than or equal to a preset distance (because the second armature moves to be connected with the friction plate, the spacing distance between the friction plate and the second armature is equal to the gap), a secondary magnetic field generated by the magnetic structure can form a loop among the first armature, the second armature, the gap and the brake stator, but the magnetic resistance is larger due to the larger gap, so that the magnetic force between the first armature and the stator generated by the magnetic structure is smaller, the elastic force of the first elastic structure cannot be overcome, the first armature cannot be attracted on the stator continuously, at the moment, the first armature is also pushed out by the first elastic structure to be in contact with the friction plate, the second armature and the first armature are both attached to the friction plate, the braking contact area is effectively increased, the braking torque is improved, and secondary braking is generated.

The utility model discloses when the friction disc wearing and tearing are serious, second armature 62 displacement distance more than or equal to when setting for the clearance promptly. The relative displacement between the second armature 62 and the first armature 61 becomes large (fig. 5), and at this time, the magnetic field generated by the first armature 61 cannot form a loop through the second armature 62, so that the magnetic resistance becomes large, and the magnetic field attraction force becomes small; at this time, the spring force generated by the outer spring (the first elastic structure 71) > the attraction force generated by the first armature 61. The first armature 61 is urged by an external spring and moves toward the friction plate 3 by the spring force. The spatial position is identical to the second armature 62, with the magnetic circuit of the first armature 61 communicating with the second armature 62.

In some embodiments, when the electromagnetic brake forms a primary brake or a secondary brake, and when the brake stator 1 is energized again, the brake stator 1 generates the primary magnetic field 200 capable of forming a loop via the brake stator 1, air, the first armature 61, the second armature 62, and air, and the magnetic structure generates the secondary magnetic field 300 forming a loop via the first armature 61 and the second armature 62, and air, and the primary magnetic field 200 and the secondary magnetic field 300 cooperatively control the first armature 61 and the second armature 62 to move toward the brake stator 1 to be attached to the brake stator 1.

This is the utility model discloses an electromagnetic brake is preferred structural style when switching on again after the braking, this moment because the auxiliary magnetic field that magnetic structure produced can form the return circuit between first armature, second armature and air, produce the magnetic force between first armature and the stator, make the magnetic force combined action to first armature and the magnetic force combined action to first armature that the main magnetic field 200 produced to first armature and second armature directness and auxiliary magnetic field produced and inhale back first armature and second armature, make the in-process that armature returned, through the magnetic circuit that produces between first armature and the second armature, provide the magnetic force of returning jointly with the magnetic force of stator, effectively increase the return force to first armature, improve the efficiency, it is rapider to reset.

When the coil 2 of the present invention is energized again, the second armature 62 and the first armature 61 are attracted to one side of the stator at the same time; when the power is cut off again, the second armature and the first armature act in sequence, and primary braking or secondary braking is carried out on the friction plate according to the spacing distance between the friction plate and the armature.

In some embodiments, the magnetic force generated by the brake stator 1 is greater than the elastic force of the second elastic structure 72, the magnetic force generated by the brake stator 1 is greater than the elastic force of the first elastic structure 71, the magnetic force generated by the magnetic structure 11 is greater than the elastic force of the first elastic structure 71 when the gap is less than a predetermined distance, and the magnetic force generated by the magnetic structure 11 is less than the elastic force of the first elastic structure 71 when the gap is greater than or equal to the predetermined distance.

This is the utility model discloses a relation between the magnetic force of brake stator and first elastic force and the second elastic force respectively and the relation between magnetic structure and the first elastic force, the utility model discloses set up the magnetic force of brake stator to be greater than the elastic force of second elastic structure, can overcome the second elastic force effectively through the electrical coil, in order effectively to suck back the second armature and not contact with the friction disc, be applicable to the condition that the motor normally worked, set up the magnetic force of brake stator to be greater than the elastic force of first elastic structure equally, can overcome first elastic force effectively through the electrical coil, in order effectively to suck back first armature and not contact with the friction disc, also be applicable to the condition that the motor normally worked (the utility model discloses only need set up the elastic force of first elastic structure to be less than stator magnetic force + the magnetic force of magnetic structure can satisfy the demand in essence, but the utility model discloses preferred can directly set up first elastic force to be less than stator magnetic force, can guarantee to the utmost like this can suck back first armature, satisfy the requirement that the motor normally works; the utility model discloses still through setting up the magnetic force of magnetic structure to be greater than first elastic force when the clearance is less than the default distance, be less than first elastic force when clearance more than or equal to default distance, can set for magnetic structure and first elastic structure according to the spacing distance between friction disc and the armature among the operating condition, guarantee effectively that this spacing distance is above the operating mode automatic execution second grade braking, the operating mode automatic execution one-level braking below this spacing distance, satisfy the demand of actual motor operating mode. The problem of the wearing and tearing of traditional stopper normal operating process spare part can lead to the clearance to increase gradually, lead to the damping torque decay is solved.

In some embodiments, the radial outer peripheral wall of the second armature 62 is in clearance fit with the radial inner peripheral wall of the first armature 61, and the clearance amount is less than or equal to 0.1mm. The gap amount of the utility model needs to be controlled, so that the gap is prevented from being too large, and the air magnetic resistance is prevented from being increased; the magnetic conduction effect between the second armature and the first armature is deteriorated; at the same time, a gap is also provided to reduce the wear and power consumption caused by the relative movement between the second armature and the first armature.

The utility model develops a double-stage brake, which has double-brake function; the armature 6 is divided into two-section structures, namely a second armature 62 (inner ring, annular) and a first armature 61 (outer ring, annular), wherein the two structures are in clearance fit and do not interfere with each other, and the clearance is less than or equal to 0.1. Adding an inner structural spring (i.e., a second elastic structure 72) to the brake stator 1; acting in conjunction with the outer spring (first resilient structure 71) to exert a spring force.

In some embodiments, a first accommodation hole 12 is provided in the brake stator 1, the first accommodation hole 12 extends from the inside of the brake stator 1 to a first axial end face 13 of the brake stator 1, the first axial end face 13 is opposite to the second armature 62, the inner diameter of the second armature 62 is smaller than the diameter of the first accommodation hole 12, the outer diameter of the second armature 62 is larger than the diameter of the first accommodation hole 12, the second elastic structure 72 is provided in the first accommodation hole 12, and one end of the second elastic structure 72 abuts against the groove bottom of the first accommodation hole 12 and the other end of the second elastic structure is in contact with the second armature 62, so as to provide elastic thrust to the second armature 62. This is the preferred structural style between the brake stator and second elastic construction and the second armature, can set up the second elastic construction wherein through the first accommodation hole that sets up promptly, the aperture of first accommodation hole is located between the external diameter and the internal diameter of second armature to can make the second elastic construction in the first accommodation hole effectively act on the second armature, provide elastic thrust.

In some embodiments, the first receiving hole 12 is a cylindrical hole, a center line of which coincides with a center axis of the brake stator 1, a center line of the center hole of the second armature 62 coincides with the center axis, and the second elastic structure 72 is a spring. The utility model discloses a first accommodation hole is preferred for the cylinder hole coaxial with the central axis of stopper stator, and second armature also is the ring cylinder structure coaxial with the central axis, can hold the motor shaft and therefrom pass, and the preferred spring of second elastic construction can provide elastic thrust to second armature through the compression.

In some embodiments, the brake stator 1 is further provided with a second accommodation hole 14 in the interior thereof, the second accommodation hole 14 extends from the interior of the brake stator 1 to the first axial end face 13 of the brake stator 1, the second accommodation hole 14 is opposite to a solid portion between the radial inner circumference and the radial outer circumference of the first armature 61, one end of the first elastic structure 71 abuts against the groove bottom of the second accommodation hole 14, and the other end thereof abuts against the first armature 61, so as to be able to provide elastic thrust to the first armature 61.

This is the preferred structural style between the brake stator and the first elastic structure and the first armature, namely can set up the first elastic structure in it through the second accommodation hole that sets up, and the second accommodation hole is relative with the solid portion of first armature in order to make the first elastic structure in the second accommodation hole can effectively act on the second armature, provides elastic thrust.

In some embodiments, the first armature 61 is a split structure, and includes a first armature 611 and a second armature 612, the first armature 611 and the second armature 612 are spliced together, and the magnetic structure 11 is disposed between the first armature 611 and the second armature 612. The utility model discloses a preferred components of a whole that can function independently structure of first armature, including first armature one and first armature two, can set up effectively between magnetic structure and first armature one and first armature two.

In some embodiments, the first armature one 611 and the first armature two 612 are arranged in an axial direction of the first armature, and an axial end face of the first armature one 611 facing the first armature two 612 is provided with a first groove, an axial end face of the first armature two 612 facing the first armature one 611 is provided with a second groove, the first groove and the second groove are oppositely connected to form a groove for accommodating the magnetic structure 11, and a part of the magnetic structure 11 is arranged in the first groove, and the other part of the magnetic structure 11 is arranged in the second groove. This is the utility model discloses a further preferred structural style of first armature of components of a whole that can function independently structure forms the first and second recess of concatenation promptly to hold magnetic structure in two recesses, accomplish setting and fixed action to magnetic structure.

In some embodiments, the first and second grooves are both annular groove structures, and the magnetic structure 11 is also an annular structure; the magnetic structure 11 is a permanent magnet; the first elastic structure 71 is a spring. The utility model discloses further two preferred recesses are the ring channel structure, and magnetic structure also can provide magnetic force between first armature and stator at the circumferencial direction homoenergetic for annular structure, and magnetic structure can provide the auxiliary magnetic field for the permanent magnet all the time, and the preferred spring that first elastic structure is the spring can provide elastic thrust through the compression of spring.

In some embodiments, the first armature one 611 and the second armature 612 are connected by screws or bolts, or the first armature one 611 and the second armature 612 are connected by bonding, or the first armature one 611, the magnetic structure 11 and the second armature 612 are integrally formed. The utility model discloses a first armature of split type structure is preferred can be through threaded fastener connection or bonding or integrated into one piece, and the structure of integral type can be realized to the homoenergetic.

The utility model discloses an embedded annular magnet steel of first armature 61 (magnetic structure 11), radial halving first armature 61, the embedded thickness size of embedded magnet steel is 3:1, the annular magnetic steel can be combined with the first armature 61 in an interference/gluing mode and embedded into the first armature.

In some embodiments, the brake stator 1 further has a coil slot 15 opened therein, the coil slot 15 extends from the inside of the brake stator 1 to the first axial end face 13 along the axial direction, a coil 2 is disposed in the coil slot 15, and the coil 2 is further connected to a power supply outside the brake stator 1 through an outgoing line 9. The utility model discloses an inside of stopper stator can set up the coil through the coil groove of seting up to the circular telegram through the coil provides the main field, provides magnetic force respectively to second armature and first armature, plays the effect of relieving the braking.

In some embodiments, the friction plate 3 is an annular structure, and the outer diameter of the friction plate 3 is larger than the inner diameter of the first armature 61 and smaller than the outer diameter of the first armature 61, and the inner diameter of the friction plate 3 is smaller than the outer diameter of the second armature 62 and larger than the inner diameter of the second armature 62; the friction plate 3 comprises a third axial end surface and a fourth axial end surface which are positioned at the two axial ends of the friction plate; when only the second armature 62 is in contact with the third axial end face of the friction plate 3, a primary braking is formed to the friction plate 3; when the second armature 62 and the first armature 61 are both in contact with the third axial end face of the friction plate 3, a two-stage braking of the friction plate 3 is formed. This is the utility model discloses a further preferred structural style of friction disc, through annular structural style, and its external diameter is located between the inside and outside footpath of first armature, the internal diameter is located between the inside and outside footpath of second armature, can contact through second armature and friction disc respectively with the while, with the torque to the friction disc provides the braking, prevent the friction disc to rotate, thereby accomplish effectively and follow up the size in clearance and form one-level braking and the second grade braking to the friction disc, solve traditional stopper normal operating process spare part wearing and tearing and can lead to the clearance crescent, lead to the problem of braking torque attenuation, and solve the problem that traditional stopper does not have the increase torque function, and solve the problem that traditional stopper can't assist the suggestion engineer to change the stopper.

In some embodiments, the brake device further comprises a baffle 4 and a square wheel 5, wherein the baffle 4 is arranged at the fourth axial end face of the friction plate 3, the square wheel 5 penetrates through the radial inner periphery of the friction plate 3, the baffle 4 is also of an annular structure, the square wheel 5 is located on the radial inner side of the baffle 4, the radial outer peripheral wall of the square wheel 5 is connected with the radial inner peripheral wall of the friction plate 3, so that the friction brake is performed on the square wheel 5 through the friction plate 3, and the baffle 4 limits the axial movement of the friction plate 3. This is the utility model discloses a further preferred structural style of doublestage stopper can carry on spacingly to the motion of the axial direction of friction disc through the baffle, and the fixed cover of friction disc is established in the periphery (preferred interference fit) of square wheel, can drive the rotation of friction disc through the rotation of square wheel, and the doublestage braking structure through second armature and first armature brakes to the rotation of friction disc, and then drives the braking effect of square wheel or even motor shaft.

The utility model also provides a motor device, it includes preceding arbitrary doublestage braking electromagnetic braking ware.

The two-stage brake of the utility model is automatically started only when the braking force generated by the second armature 62 and the friction plate 3 is insufficient, after the two-stage brake is started, the first armature 61 and the outer spring (the first elastic structure 71) generate the braking force generated by the friction plate 3 and the braking force is used as the second-stage braking force to instantly supplement the first-stage braking force (the first-stage braking force is the braking force generated by the second armature 62, the inner spring (the second elastic structure 72) and the friction plate 3); the double-stage braking force meets the whole normal requirement of the motor, the safety of a servo system and the stability of equipment under the specific working condition (such as the working condition that a production line cannot stop and the working condition that the specific requirement cannot stop) are prolonged, the sound of the armature and the friction plate can obviously appear twice during starting, and at the moment, an engineer can judge that the brake is abnormal according to the sound of double braking and prepare for replacing the brake.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (19)

1. A two-stage braking electromagnetic brake is characterized in that: the method comprises the following steps:

the brake comprises a brake stator (1), a first armature (61), a second armature (62), a friction plate (3), a first elastic structure (71), a second elastic structure (72) and a magnetic structure (11), wherein the first armature (61) and the second armature (62) are located between the brake stator (1) and the friction plate (3) in the axial direction of the brake stator (1); the first elastic structure (71) can provide elastic force to the first armature (61), the second elastic structure (72) can provide elastic force to the second armature (62), and the magnetic structure (11) can generate magnetic force between the first armature (61) and the brake stator (1);

when the brake stator (1) is powered off, the second armature (62) can be driven to be attached to the friction plate (3) to form primary braking, a gap (100) is formed between the second armature (62) and the brake stator (1), when the gap (100) is larger than or equal to a preset distance, the magnetic force between the first armature (61) and the brake stator (1) generated by the magnetic structure (11) is smaller than the elastic force of the first elastic structure (71), and the elastic force of the first elastic structure (71) drives the first armature (61) to move to be attached to the friction plate (3) to form secondary braking.

2. The two-stage braking electromagnetic brake of claim 1, wherein:

the first armature (61) and the second armature (62) are both annular structures, the first armature (61) is arranged on the radial periphery of the second armature (62), the first elastic structure (71) is arranged on the brake stator (1) and only provides elastic force for the first armature (61), the second elastic structure (72) is arranged on the brake stator (1) and only provides elastic force for the second armature (62), and the magnetic structure (11) is arranged on the first armature (61).

3. The two-stage braking electromagnetic brake of claim 1 or 2, characterized in that:

when the brake stator (1) is electrified, a main magnetic field (200) generated by the brake stator (1) can form a loop through the brake stator (1), the first armature (61) and the second armature (62), and a secondary magnetic field (300) generated by the magnetic structure (11) also forms a loop through the brake stator (1), the first armature (61) and the second armature (62), wherein the first armature (61) and the second armature (62) are attached to the brake stator (1).

4. The two-stage braking electromagnetic brake according to claim 1 or 2, characterized in that:

when the brake stator (1) is powered off, no magnetic force exists between the second armature (62) and the brake stator (1), the second armature (62) is pushed out by the second elastic structure (72) to form the gap (100) with the brake stator (1), a secondary magnetic field (300) generated by the magnetic structure (11) forms a loop through the brake stator (1), the first armature (61), the second armature (62) and the gap (100), and when the gap (100) is smaller than a preset distance, the magnetic force generated by the magnetic structure (11) between the first armature (61) and the brake stator (1) is larger than the elastic force of the first elastic structure (71), and the magnetic force generated by the magnetic structure (11) controls the first armature (61) to continuously fit with the brake stator (1); at the moment, the second armature (62) is not attached to the brake stator (1) to form primary braking.

5. The two-stage braking electromagnetic brake of claim 1 or 2, characterized in that:

when the brake stator (1) is powered off, an auxiliary magnetic field (300) generated by the magnetic structure (11) forms a loop through the brake stator (1), the first armature (61), the second armature (62) and the gap (100), and when the gap (100) between the second armature (62) and the brake stator (1) is greater than or equal to a preset distance, a magnetic force generated by the magnetic structure (11) between the first armature (61) and the brake stator (1) is smaller than an elastic force of the first elastic structure (71), and the first armature (61) is pushed out by the first elastic structure (71) to form secondary braking.

6. The two-stage braking electromagnetic brake of claim 1 or 2, characterized in that:

when the electromagnetic brake forms primary braking or secondary braking and when the brake stator (1) is electrified again, a main magnetic field (200) generated by the brake stator (1) can form a loop through the brake stator (1), air, the first armature (61), the second armature (62) and the air, a secondary magnetic field (300) generated by the magnetic structure forms a loop through the first armature (61), the second armature (62) and the air, and the main magnetic field (200) and the secondary magnetic field (300) jointly control the first armature (61) and the second armature (62) to move towards the brake stator (1) to be attached to the brake stator (1).

7. The two-stage braking electromagnetic brake of claim 1 or 2, characterized in that:

the magnetic force generated by the brake stator (1) is greater than the elastic force of the second elastic structure (72), the magnetic force generated by the brake stator (1) is greater than the elastic force of the first elastic structure (71), when the gap is smaller than a preset distance, the magnetic force generated by the magnetic structure (11) is greater than the elastic force of the first elastic structure (71), and when the gap is greater than or equal to the preset distance, the magnetic force generated by the magnetic structure (11) is smaller than the elastic force of the first elastic structure (71).

8. The two-stage braking electromagnetic brake of claim 2, wherein:

the radial outer peripheral wall of the second armature (62) is in clearance fit with the radial inner peripheral wall of the first armature (61), and the clearance is less than or equal to 0.1mm.

9. The two-stage braking electromagnetic brake of claim 2, wherein:

the inner portion of the brake stator (1) is provided with a first accommodating hole (12), the first accommodating hole (12) extends from the inner portion of the brake stator (1) to a first axial end face (13) of the brake stator (1), the first axial end face (13) is opposite to the second armature (62), the inner diameter of the second armature (62) is smaller than the diameter of the first accommodating hole (12), the outer diameter of the second armature (62) is larger than the diameter of the first accommodating hole (12), the second elastic structure (72) is arranged in the first accommodating hole (12), one end of the second elastic structure (72) is abutted to the groove bottom of the first accommodating hole (12), and the other end of the second elastic structure is connected with the second armature (62) so as to provide elastic thrust for the second armature (62).

10. The two-stage braking electromagnetic brake of claim 9, wherein:

the first accommodating hole (12) is a cylindrical hole, the center line of the first accommodating hole coincides with the central axis of the brake stator (1), the center line of the central hole of the second armature (62) coincides with the central axis, and the second elastic structure (72) is a spring.

11. The two-stage braking electromagnetic brake of claim 9, wherein:

the inside of stopper stator (1) still is provided with second accommodation hole (14), second accommodation hole (14) extend to from the inside of stopper stator (1) first axial terminal surface (13) of stopper stator (1), and second accommodation hole (14) are relative with the entity portion between the radial inner periphery and the radial outer periphery of first armature (61), the one end of first elastic construction (71) with the tank bottom butt of second accommodation hole (14), the other end with first armature (61) meet, in order to can to the first armature (61) provide elastic thrust.

12. The two-stage braking electromagnetic brake of claim 11, wherein:

the first armature (61) is of a split structure and comprises a first armature (611) and a second armature (612), the first armature (611) and the second armature (612) are spliced, and the magnetic structure (11) is arranged between the first armature (611) and the second armature (612).

13. The two-stage braking electromagnetic brake of claim 12, wherein:

the first armature I (611) and the second armature II (612) are arranged in a manner of being connected in the axial direction of the first armature, a first groove is formed in an axial end face, facing the first armature II (612), of the first armature I (611), a second groove is formed in an axial end face, facing the first armature I (611), of the first armature II (612), the first groove and the second groove are connected in an opposite mode to form a groove for accommodating the magnetic structure (11), and part of the magnetic structure (11) is arranged in the first groove, and the other part of the magnetic structure is arranged in the second groove.

14. The two-stage braking electromagnetic brake of claim 13, wherein:

the first groove and the second groove are both annular groove structures, and the magnetic structure (11) is also an annular structure; the magnetic structure (11) is a permanent magnet; the first elastic structure (71) is a spring.

15. The two-stage braking electromagnetic brake of claim 12, wherein:

the first armature I (611) and the second armature II (612) are connected through a screw or a bolt, or the first armature I (611) and the second armature II (612) are connected through bonding, or the first armature I (611), the magnetic structure (11) and the second armature II (612) are integrally formed.

16. The two-stage braking electromagnetic brake of claim 9, wherein:

the brake structure is characterized in that a coil groove (15) is further formed in the brake stator (1), the coil groove (15) extends to the first axial end face (13) from the inside of the brake stator (1) along the axial direction, a coil (2) is arranged in the coil groove (15), and the coil (2) is further connected to a power supply outside the brake stator (1) through an outgoing line (9).

17. The two-stage braking electromagnetic brake of claim 1 or 2, characterized in that:

the friction plate (3) is of an annular structure, the outer diameter of the friction plate (3) is larger than the inner diameter of the first armature (61) and smaller than the outer diameter of the first armature (61), and the inner diameter of the friction plate (3) is smaller than the outer diameter of the second armature (62) and larger than the inner diameter of the second armature (62); the friction plate (3) comprises a third axial end surface and a fourth axial end surface which are positioned at the two axial ends of the friction plate; when only the second armature (62) is connected with the third axial end face of the friction plate (3), primary braking is formed on the friction plate (3); when the second armature (62) and the first armature (61) are both in contact with the third axial end face of the friction plate (3), a two-stage braking of the friction plate (3) is formed.

18. The two-stage braking electromagnetic brake of claim 17, wherein:

still include baffle (4) and square wheel (5), baffle (4) set up in friction disc (3) fourth axial terminal surface department, wear to locate in square wheel (5) the radial internal week of friction disc (3), just baffle (4) also are the loop configuration, square wheel (5) are located the radial inboard of baffle (4), the radial periphery wall of square wheel (5) with the radial internal perisporium of friction disc (3) meets, in order to pass through friction disc (3) are right friction braking is carried out to square wheel (5), baffle (4) are right the axial motion of friction disc (3) carries on spacingly.

19. An electric machine device characterized in that: comprising a two-stage braking electromagnetic brake according to any one of claims 1 to 18.

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