CN220037304U

CN220037304U - Three-phase alternating current power-off brake

Info

Publication number: CN220037304U
Application number: CN202321603827.2U
Authority: CN
Inventors: 马南; 黎华; 江海亮; 凌陆
Original assignee: Taibang Motor Industry Group Co ltd
Current assignee: Taibang Motor Industry Group Co ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-11-17
Anticipated expiration: 2033-06-21

Abstract

The utility model discloses a three-phase alternating current power-off brake, which comprises a rear end cover, a friction component, a brake plate, a brake armature and a brake yoke component which are coaxially arranged on a rotor shaft in sequence.

Description

Three-phase alternating current power-off brake

Technical Field

The utility model relates to the technical field of brakes, in particular to a three-phase alternating current power-off brake.

Background

A brake is a device having a function of decelerating, stopping, or maintaining a stopped state of a moving part (or a moving machine), and is a mechanical component for stopping or decelerating a moving part in the machine, and is commonly called a brake. In the existing AC servo motor, a brake is needed, and the brake is mainly used for braking the servo motor and keeping the required position state.

The existing brake is installed at the rear end cover of a motor and mainly comprises a magnetic yoke iron core, an armature, a coil structure, a magnetic yoke bottom plate, a brake plate, friction plates and the like, wherein the brake plate is arranged in linkage with a rotor shaft, the friction plates are arranged on two sides of the brake plate, the magnetic yoke iron core is installed on the magnetic yoke bottom plate, the armature is sleeved outside the rotor shaft and is movably arranged relative to a brake magnetic yoke assembly, the coil structure is a three-phase coil, a plurality of coil groups are required to be wound on a coil frame respectively, then the wound coil structure is integrally installed on the magnetic yoke bottom plate, the coil structure is correspondingly sleeved on the magnetic yoke iron core, and the following problems still exist in the coil installation mode: the manufacturing process of the three-phase coil structure is complex, the installation is inconvenient, and particularly, under the condition that a coil group fails, the whole three-phase coil is usually taken out for replacement, and the installation and maintenance cost is high.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the problems of complex manufacturing process, inconvenient installation, low assembly efficiency and high installation and maintenance cost of the three-phase coil structure of the brake in the prior art, thereby providing the three-phase alternating current power-off brake which has the advantages of simple installation structure, convenient installation and replacement, improved assembly efficiency and reduced production cost and maintenance cost.

In order to solve the above problems, the present utility model provides a three-phase ac power-off brake, which comprises a rear end cover, a friction assembly, a brake plate, a brake armature and a brake yoke assembly coaxially arranged on a rotor shaft in sequence, wherein the brake yoke assembly comprises:

a yoke base plate having a circular recess;

the magnetic yokes are arranged in the circular grooves in a matching manner, and a plurality of magnetic yoke iron cores which are distributed at intervals along the circumferential direction are formed on the side surface of the magnetic yoke facing the brake armature;

the coil modules are respectively matched and arranged on the plurality of magnetic yoke iron cores, each coil module consists of a coil frame and a coil wound on the coil frame, and the magnetic yoke iron cores penetrate through the middle cavity of the coil frame; and pouring sealant structures for coating the plurality of coil modules are filled in the circular grooves in a pouring manner.

As a preferable scheme, the magnet yoke is fixed with the magnet yoke bottom plate through screws, the magnet yoke iron core and the magnet yoke are integrally formed, 6 magnet yoke iron cores are formed on the magnet yoke at intervals, and 6 coil modules are correspondingly arranged.

As a preferable scheme, the cross section shape of the magnetic yoke iron core is in a sector shape, and the shape of the middle cavity of the coil frame is matched with the magnetic yoke iron core.

Preferably, the brake plate is fixedly connected to the brake armature and moves reciprocally with the brake armature between the friction assembly and the brake yoke assembly.

As a preferable scheme, the brake plate and the brake armature are respectively in a circular structure, and a spring structure is arranged between the brake plate and the magnetic yoke bottom plate.

As a preferred solution, the friction assembly is connected to the rotor shaft by means of a hub, between which a flat key for transmitting torque is arranged.

As a preferable scheme, the friction assembly comprises a fixed disc fixedly sleeved on the outer side of the hub and two friction plates attached to two sides of the fixed disc, wherein the two friction plates are respectively arranged opposite to the rear end cover and the brake plate.

As a preferable scheme, the brake plate, the brake armature, the magnetic yoke and the magnetic yoke bottom plate are respectively and correspondingly provided with a through hole structure for the rotor shaft to pass through, the center of the circular groove is provided with a hollow column body along the axial direction of the rotor shaft, the through hole structure penetrates through the hollow column body, and the potting height of the pouring sealant structure is lower than that of the hollow column body.

As a preferable mode, the yoke base plate and the rear end cover are fixedly connected through a plurality of fixing rods, the yoke base plate comprises a plurality of first bosses arranged on the outer side of the yoke base plate, and a plurality of connecting holes arranged on the plurality of first bosses, the rear end cover is provided with a plurality of fixing holes opposite to the plurality of connecting holes, and the fixing rods pass through the connecting holes and are then fixedly connected in the fixing holes.

As a preferable scheme, the rear end cover is provided with a plurality of guide sleeves at a plurality of fixing hole positions, through which the fixing rod can pass, a plurality of second bosses opposite to the first bosses are arranged on the peripheral side edge of the brake plate, the second bosses are provided with guide holes for the guide sleeves in a sliding sleeve manner, and the bottom of the first boss is provided with a limiting rod matched with and abutted to the top end of the fixing sleeve in a extending manner along the length direction of the fixing rod.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

1. in the three-phase alternating current power-off brake provided by the utility model, the brake magnetic yoke assembly consists of a magnetic yoke base plate, a magnetic yoke and a plurality of coil modules, and a plurality of magnetic yoke iron cores are formed on the side surface of the magnetic yoke at intervals along the circumferential direction, the coil modules are formed by winding coils on a coil frame, when the brake magnetic yoke assembly is assembled, the plurality of coil modules are matched and arranged on the plurality of magnetic yoke iron cores, then the magnetic yoke assembled with the coil modules is arranged on a circular groove of the magnetic yoke base plate, and the coil parts of the coil modules can be sealed and covered by a layer of pouring sealant structure through pouring and sealing in the circular groove, so that the waterproof, dustproof, insulating and shockproof effects are realized on the coils, and the magnetic yoke iron cores and the coil modules are tightly combined together. By adopting the three-phase alternating current power-off brake designed by the technical scheme, the modularized installation between the magnetic yoke iron core and the coil module is realized, the installation process is simplified, the installation and the replacement are convenient, the assembly time is saved, the mass production and the assembly of products can be better met, the assembly efficiency is improved, and the production cost and the maintenance cost are reduced.

2. In the three-phase alternating current power-off brake provided by the utility model, the brake plate and the brake armature are fixedly connected into a whole, and a spring structure is arranged between the brake plate and the magnetic yoke base plate, the structure enables the brake plate and the brake armature to form an integral linkage fit, when the motor rotates, the brake magnetic yoke assembly is electrified to generate electromagnetic force to enable the brake armature to be attracted with the magnetic yoke iron core, so that the brake armature drives the brake plate to be separated from the friction plate, the brake plate can not apply pressure to the friction plate at the moment, and the rotor shaft drives the friction plate assembly to rotate, so that the normal operation of the motor is realized; when the motor is powered off, the brake magnetic yoke assembly is powered off, and the brake plate moves to one side close to the friction plate under the action of spring force and is tightly attached to the friction plate, so that friction force is generated to play a role in braking the motor.

3. In the three-phase alternating current power-off brake provided by the utility model, the magnetic yoke bottom plate is fixedly connected with the rear end cover through the plurality of fixing rods, the rear end cover is provided with the plurality of guide sleeves through which the fixing rods can pass, the outer peripheral side edge of the brake plate is provided with the plurality of second bosses, the second bosses are provided with the guide holes which are sleeved on the guide sleeves in a sliding way, and the guide sleeves and the fixing rods are arranged in the same direction as the rotor shaft in an extending way according to the guide sleeves and the fixing rods.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a schematic cross-sectional view of a three-phase AC power-off brake according to the present utility model;

FIG. 2 is a side view of the three-phase AC power-off brake of the present utility model;

FIG. 3 is a schematic diagram of the three-phase AC power-off brake of FIG. 2 after the rear end cover is hidden;

FIG. 4 is a schematic structural view of a brake yoke assembly according to the present utility model.

Reference numerals illustrate: 1. a rear end cover; 11. a fixed rod; 12. a guide sleeve; 2. a friction assembly; 21. a fixed plate; 22. a friction plate; 3. a brake plate; 31. a second boss; 4. a brake armature; 5. a yoke; 51. a yoke core; 6. a yoke base plate; 61. a circular groove; 62. a first boss; 63. a limit rod; 64. a screw; 7. a coil module; 8. a spring structure; 9. a hub; 91. a rotor shaft.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

The embodiment provides a three-phase alternating current power-off brake as shown in fig. 1-4, which comprises a rear end cover 1, a friction assembly 2, a brake plate 3, a brake armature 4 and a brake yoke assembly, wherein the rear end cover 1, the friction assembly 2, the brake plate 3, the brake armature 4 and the brake yoke assembly are coaxially arranged on a rotor shaft 91 in sequence, the brake yoke assembly comprises a yoke base plate 6, a yoke 5 and a plurality of coil modules 7, and the yoke base plate 6 is provided with a circular groove 61; the magnetic yoke 5 is installed and accommodated in the circular groove 61 in a matching way, and a plurality of magnetic yoke iron cores 51 which are distributed at intervals along the circumferential direction are formed on the side surface facing the brake armature; the plurality of coil modules 7 are respectively matched and arranged on the plurality of magnetic yoke iron cores 51, each coil module 7 consists of a coil frame and a coil wound on the coil frame, and the magnetic yoke iron cores 51 penetrate through the middle cavity of the coil frame; the circular groove 61 is filled with a pouring sealant structure for covering the plurality of coil modules 7.

In the above embodiment, according to the brake yoke assembly comprising the yoke base plate 6, the yoke 5 and the plurality of coil modules 7, and the plurality of yoke cores 51 are formed on the side surface of the yoke 5 at intervals along the circumferential direction, the coil modules 7 are formed by winding coils on the coil frame, when assembling, the plurality of coil modules 7 are matched and arranged on the plurality of yoke cores 51, then the yoke 5 provided with the coil modules 7 is mounted on the circular groove 61 of the yoke base plate 6, the coil parts of the coil modules 7 can be sealed and covered by encapsulating a layer of potting adhesive structure in the circular groove 61, the coil has the effects of water resistance, dust resistance, insulation and vibration resistance, and the yoke cores 51 and the coil modules 7 are tightly combined together. By adopting the three-phase alternating current power-off brake designed by the technical scheme, the modularized installation between the magnetic yoke iron core and the coil module is realized, the installation process is simplified, the installation and the replacement are convenient, the assembly time is saved, the mass production and the assembly of products can be better met, the assembly efficiency is improved, and the production cost and the maintenance cost are reduced.

As a concrete structure setting, yoke iron core 51 and yoke 5 are integrated into one piece structural shaping, according to the three-phase coil structure that three-phase AC power-off brake adopted, yoke iron core 51 is in interval shaping has 6 on the yoke 5, coil module 7 corresponds and is provided with 6, the cross-sectional shape of yoke iron core 51 is fan-shaped, the middle part cavity shape of coil former with yoke iron core 51 assorted, yoke 5 passes through screw 64 with yoke bottom plate 6 to make the yoke keeps relative position fixed in circular recess, and has the pouring sealant structure in circular recess, and this kind of brake yoke subassembly adopts the embedment mode, can promote the protection level and the insulating grade of stopper, because of adopting three-phase AC, the accessible adjustment coil's parameter makes it be applicable to variable frequency power supply.

The specific arrangement of the brake plates and friction pack is described in detail below in conjunction with fig. 1 and 3-4:

the brake plate 3 is fixedly connected with the brake armature 4 and moves back and forth between the friction assembly 2 and the brake magnetic yoke assembly along with the brake armature 4, wherein the brake plate 3 and the brake armature 4 are respectively in a circular structure, a spring structure 8 is arranged between the brake plate 3 and the magnetic yoke bottom plate 6, and the spring structure 8 applies elastic force for the brake plate 3 to move away from one side of the magnetic yoke iron core 51. Further preferably, the friction assembly 2 is connected to the rotor shaft 91 through the hub 9, a flat key for transmitting torque is arranged between the hub 9 and the rotor shaft 91, a limiting piece for limiting the hub 9 to move towards one side close to the brake plate 3 is arranged on the rotor shaft, the friction assembly 2 comprises a fixed disc 21 fixedly sleeved on the outer side of the hub 9, and two friction plates 22 attached to two sides of the fixed disc 21, the hub 9 and the fixed disc 21 are connected through splines, the two friction plates 22 are respectively arranged opposite to the rear end cover 1 and the brake plate 3, the structure is arranged, slipping between the rotor shaft and the hub can be prevented by virtue of the flat key structure, so that the rotor shaft drives the friction plates to coaxially rotate, and meanwhile, the hub 9 can be enabled to slightly move along the axial direction within a set distance to realize self-alignment. According to the above structure, the brake plate 3 and the brake armature 4 are fixed together to realize integral linkage fit, when the motor rotates, the brake yoke assembly is electrified to generate electromagnetic force to enable the brake armature 4 to be attracted with the yoke iron core 51, so that the brake plate 3 is driven by the brake armature 4 to be separated from the friction plate 22, the brake plate 3 can not apply pressure to the friction plate 22 at the moment, and the rotor shaft drives the friction assembly to rotate, so that the normal operation of the motor is realized; when the motor is powered off, the brake yoke assembly is powered off immediately, the brake plate 3 moves towards one side close to the friction plate under the action of spring force and is tightly attached to the friction plate on one side of the friction assembly 2, and the friction plate on the other side of the friction assembly is tightly attached to the rear end cover by extrusion force, so that larger friction force is generated to play a role in braking the motor.

In this embodiment, as shown in fig. 1, the rear end cover 1, the brake plate 3, the brake armature 4, the magnetic yoke 5 and the magnetic yoke bottom plate 6 are respectively provided with a through hole structure for the rotor shaft to pass through correspondingly, the rear end cover 1 is installed at the rear end position of the motor, the center of the circular groove 61 is provided with a hollow cylinder along the axial direction of the rotor shaft, the through hole structure penetrates through the hollow cylinder, so that the rotor shaft can rotate and penetrate through the hollow cylinder, and the potting height of the potting adhesive structure is lower than that of the hollow cylinder, so that the potting adhesive can be prevented from flowing into the hollow cylinder during glue filling to affect the rotation of the rotor shaft. Further preferably, the yoke base plate 6 is fixedly connected with the rear end cover 1 through a plurality of fixing rods 11, the yoke base plate 6 comprises a plurality of first bosses 62 arranged on the outer periphery side of the yoke base plate, and a plurality of connecting holes arranged on the plurality of first bosses 62, the rear end cover 1 is provided with a plurality of fixing holes opposite to the plurality of connecting holes, the fixing rods 11 penetrate through the connecting holes and are fixedly connected in the fixing holes, the fixing rods 11 are preferably in a screw structure, and a fastening force for fixedly connecting the yoke base plate with the rear end cover is applied after fixing, so that the installation is stable and reliable.

In order to ensure the stability of the braking plate 3 in reciprocating motion between the friction assembly 2 and the brake yoke assembly, the rear end cover 1 is provided with a plurality of guide sleeves 12 at a plurality of fixing holes for the fixing rod 11 to pass through, a plurality of second bosses 31 opposite to the first bosses 62 are arranged on the peripheral side edge of the braking plate 3, the second bosses 31 are provided with guide holes sleeved on the guide sleeves 12 in a sliding manner, the bottoms of the first bosses 62 are provided with limiting rods 63 which are matched and abutted to the top ends of the fixing sleeves in an extending manner along the length direction of the fixing rod 11, the limiting rods 63 are correspondingly provided with connecting holes for the fixing rod 11 to pass through, and the guide sleeves 12 and the fixing rod 11 are arranged in the same-direction extending manner as the rotor shaft.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. The utility model provides a three-phase interchange power-off brake, includes rear end cover (1), friction subassembly (2), braking board (3), brake armature (4) and brake yoke subassembly (6) on rotor shaft (91) coaxial setting in proper order, its characterized in that, brake yoke subassembly (6) include:

a yoke base plate (6) having a circular groove (61);

a magnetic yoke (5) which is arranged in the circular groove (61) in a matching way, and a plurality of magnetic yoke iron cores (51) which are distributed at intervals along the circumferential direction are formed on the side surface facing the brake armature;

a plurality of coil modules (7) which are respectively matched and arranged on a plurality of the magnet yoke iron cores (51), wherein each coil module (7) consists of a coil frame and a coil wound on the coil frame, and the magnet yoke iron cores (51) penetrate through a middle cavity of the coil frame; and pouring sealant structures for coating the plurality of coil modules (7) are filled in the circular grooves (61) in a pouring manner.

2. The three-phase ac power-off brake of claim 1, wherein: the magnetic yoke (5) is fixed with the magnetic yoke bottom plate (6) through screws (64), the magnetic yoke iron core (51) and the magnetic yoke (5) are formed into an integral structure, 6 magnetic yoke iron cores (51) are formed on the magnetic yoke (5) at intervals, and 6 coil modules (7) are correspondingly arranged.

3. The three-phase ac power-off brake of claim 2, wherein: the cross section of the magnetic yoke iron core (51) is in a sector shape, and the shape of a cavity in the middle of the coil frame is matched with the magnetic yoke iron core (51).

4. A three-phase ac power-off brake according to any one of claims 1-3, characterized in that: the brake plate (3) is fixedly connected with the brake armature (4) and moves back and forth between the friction component (2) and the brake magnetic yoke component (6) along with the brake armature.

5. The three-phase ac power-off brake of claim 4, wherein: the brake plate (3) and the brake armature (4) are respectively in a circular structure, and a spring structure (8) is arranged between the brake plate (3) and the magnetic yoke base plate (6).

6. The three-phase ac power-off brake of claim 1, wherein: the friction assembly (2) is connected to the rotor shaft (91) through a hub (9), and a flat key for transmitting torque is arranged between the hub (9) and the rotor shaft (91).

7. The three-phase ac power-off brake of claim 6, wherein: the friction assembly (2) comprises a fixed disc (21) fixedly sleeved on the outer side of the hub (9), and two friction plates (22) attached to two sides of the fixed disc (21), wherein the two friction plates (22) are respectively arranged opposite to the rear end cover (1) and the brake plate (3).

8. The three-phase ac power-off brake of claim 1, wherein: the brake plate (3), the brake armature (4), the magnetic yoke (5) and the magnetic yoke bottom plate (6) are respectively and correspondingly provided with a through hole structure through which a rotor shaft can pass, the center of the circular groove (61) is provided with a hollow column body along the axial direction of the rotor shaft, the through hole structure penetrates through the hollow column body, and the potting height of the pouring sealant structure is lower than that of the hollow column body.

9. The three-phase ac power-off brake of claim 8, wherein: the magnetic yoke bottom plate (6) is fixedly connected with the rear end cover (1) through a plurality of fixing rods (11), the magnetic yoke bottom plate (6) comprises a plurality of first bosses (62) arranged on the peripheral side of the magnetic yoke bottom plate and a plurality of connecting holes arranged on the plurality of first bosses (62), the rear end cover (1) is provided with a plurality of fixing holes opposite to the plurality of connecting holes, and the fixing rods (11) penetrate through the connecting holes and are fixedly connected in the fixing holes.

10. The three-phase ac power-off brake of claim 9, wherein: the rear end cover (1) is equipped with a plurality of uide bushing (12) that can supply the dead lever to pass in a plurality of fixed orifices positions department, be equipped with on the periphery side of brake block (3) with a plurality of second bosss (31) that a plurality of first bosss (62) are relative, be equipped with the slip cap on second boss (31) and locate the guiding hole of uide bushing (12), first boss (62) bottom is along dead lever length direction extension shaping has gag lever post (63) of cooperation butt on the dead lever bushing top.