CN220692941U

CN220692941U - Brake and motor

Info

Publication number: CN220692941U
Application number: CN202322420514.XU
Authority: CN
Inventors: 任明锋
Original assignee: Suzhou Lingci Electromechanical Co ltd
Current assignee: Suzhou Lingci Electromechanical Co ltd
Priority date: 2023-09-06
Filing date: 2023-09-06
Publication date: 2024-03-29
Anticipated expiration: 2033-09-06

Abstract

The utility model discloses a brake and a motor, and relates to the technical field of servo motor braking. The brake includes: a rotor assembly and a stator assembly. The rotor assembly comprises a hub, an elastic piece and an armature plate, wherein the elastic piece and the armature plate are sleeved on the hub along a first direction, a protruding portion is arranged at the top of the hub along the first direction, a plurality of fastening screws are arranged on the periphery of the protruding portion in a ring mode, and the elastic piece can deform and drive the armature plate to move along the first direction. The stator assembly comprises a base and a bracket sleeved on the base, wherein the base is at least partially sleeved on the periphery of the hub along the first direction; the support is equipped with a plurality of permanent magnet steel along circumference ring, permanent magnet steel can form the permanent magnetic field so that the elastic component takes place deformation. By adopting the technology provided by the utility model, larger braking torque can be effectively realized in a limited installation space.

Description

Brake and motor

Technical Field

The utility model relates to the technical field of servo motor braking, in particular to a brake and a motor.

Background

In the prior art, the servo motor is mainly applied to the fields requiring higher control precision, and the fields generally have the development trend of light structure of the servo motor. The brake is used as a main structure of the servo motor, and under the trend of light weight, the installation space and the limited assembly difficulty of the brake are large, so that the common servo motor brake in the prior art is difficult to achieve large torque, and the function of partial high torque is limited.

Moreover, the servo motor belongs to a mechanical device, and after the servo motor works for a period of time, the temperature rise phenomenon can occur, and the high-temperature environment can further lead to serious attenuation of the braking torque of the brake, so that the servo motor is required to be added with a cooling system to enhance heat dissipation and improve the braking capability of the servo motor.

Disclosure of Invention

The utility model provides a brake, which aims to solve the problems that in the prior art, the installation space of a brake of a servo motor is limited, and large torque is difficult to achieve, so that part of high-torque functions are limited.

In order to solve the technical problems, the technical scheme adopted by the utility model is to provide a brake, which comprises: a rotor assembly and a stator assembly.

The rotor assembly comprises a hub, an elastic piece and an armature plate, wherein the elastic piece and the armature plate are sleeved on the hub along a first direction, a protruding portion is arranged at the top of the hub along the first direction, a plurality of fastening screws are arranged on the periphery of the protruding portion in a ring mode, and the elastic piece can deform and drive the armature plate to move along the first direction.

The stator assembly comprises a base and a bracket sleeved on the base, wherein the base is at least partially sleeved on the periphery of the hub along the first direction; the support is equipped with a plurality of permanent magnet steel along circumference ring, permanent magnet steel can form the permanent magnetic field so that the elastic component takes place deformation.

The technical scheme provided by the utility model has the beneficial effects that:

the elastic piece deforms under the action of a permanent magnetic field generated by the permanent magnetic steel, so that the armature plate connected with the elastic piece is driven to displace along the first direction. When the elastic member is deformed, the armature plate contacts the upper end of the stator assembly in the first direction and generates a large friction torque, thereby braking the armature plate and thus the rotor assembly.

In addition, the protrusion periphery of concentrator is equipped with the holding screw, and when rotor subassembly and external equipment installation were connected, the holding screw can be fixed a position through the shoulder of external equipment to greatly reduced the assembly degree of difficulty of stopper, wherein, when rotor subassembly was stopped to the stator subassembly, rotor subassembly was stopped external equipment through holding screw conduction braking force.

The hub is at least partially sleeved in the base, so that an air gap between the stator assembly and the rotor assembly can be adjusted according to practical application.

In some embodiments, the brake is a keyless structure.

By adopting the technical scheme, the keyslot-free structure is that the rotor assembly and the stator assembly are not provided with keyslots, and compared with the common pulse vibration which is caused by uneven magnetic resistance and causes air gap magnetic induction in the prior art, the rotor assembly and the stator assembly can effectively reduce the moment of inertia. The rotor assembly is of a keyless structure, and the back clearance of positive and negative braking can be effectively eliminated by combining the set screw.

In some embodiments, the HV hardness value of the permanent magnet steel ranges from HV430 to HV480 to promote the temperature resistance level and magnetic energy product of the permanent magnet steel.

By adopting the technical scheme, the high-performance EH-level permanent magnet steel has the HV hardness value ranging from HV430 to HV480, and can effectively improve the heat resistance level and the magnetic energy product by improving the hardness value.

In some embodiments, the stator assembly further comprises a coil and a slot disc housing, the coil being sleeved on the base and located above the permanent magnet steel along the first direction; the trough plate shell is sleeved on the periphery of the base, wherein the coil is located between the base and the trough plate shell.

By adopting the technical scheme, the slotted disk shell is used for cladding the coil, wherein the permanent magnet steel is positioned at the bottom of the coil along the first direction, and when the permanent magnet steel is magnetized, the permanent magnet steel can form a permanent magnetic field along the first direction, namely, an N magnetic pole and an S magnetic pole are formed along the first direction, so that magnetic attraction force is generated on the elastic piece, and the armature plate is contacted with the upper end face of the stator assembly (namely, the slotted disk shell). Thereby achieving a large braking torque.

In some embodiments, the coil further comprises a power connection capable of passing through the bracket to connect with an external power source such that the coil is capable of generating a periodically varying electromagnetic field in accordance with the external power source, wherein the electromagnetic field generated by the coil and the permanent magnetic field generated by the permanent magnet steel are balanced and opposite in polarity.

By adopting the technical scheme, the coil is connected with an external power supply through the power connection to realize the control of the external power supply and further control of the existence of an electromagnetic field, wherein the magnetic poles of the permanent magnetic field generated by the electromagnetic field and the permanent magnetic steel are reversed, so that the elastic piece is not influenced by the magnetic attraction of the permanent magnetic field to reset, and the armature plate is driven to be far away from the stator assembly, namely, no braking torque exists at the moment. When the rotor assembly is connected to an external device, the external device can be rotated at will.

In some embodiments, the elastic member and the armature plate are connected by a rivet, the rivet including a first rivet and a second rivet, the first rivet and the second rivet being opposite in rivet direction and disposed at intervals along a circumference of the elastic member, wherein the first rivet and the second rivet each have a tooth washer.

By adopting the technical scheme, the elastic piece and the armature plate can be effectively promoted to be tightly attached by riveting the first riveting piece and the second riveting piece, so that the armature plate can be timely displaced when the elastic piece deforms. The riveting piece is provided with the tooth-shaped gasket, so that the loosening phenomenon between the elastic piece and the armature plate can be effectively avoided.

In some embodiments, the bottom of the base is circumferentially looped with a plurality of locking members for securing the stator assembly.

By adopting the technical scheme, the locking piece is arranged at the bottom of the base, so that the base can be effectively limited in the first direction and the second direction, the stator assembly is fixed, and displacement of the stator assembly caused by braking torque is avoided.

In some embodiments, the resilient member is a leaf spring.

By adopting the technical scheme, the plate spring is easier to be tightly attached to the armature plate and the hub, and can generate larger deformation under the action of the magnetic attraction force of the permanent magnet steel so as to drive the armature plate to displace.

In some embodiments, the present application also provides an electric machine comprising the brake, motor shaft, and motor housing described above.

The motor shaft extends along a first direction, the rotor assembly of the brake is fixed on the motor shaft, and the motor shaft is limited along the first direction through a set screw, wherein the motor shaft and the rotor assembly rotate simultaneously or stop simultaneously.

A bearing is arranged in the motor housing, wherein a stator assembly of the brake is positioned in the motor housing and is limited in a second direction through the bearing _。

By adopting the technical scheme, the rotor assembly is fixed on the motor shaft through the set screw, and the set screw is positioned by the shaft shoulder of the motor shaft, so that the mounting difficulty of the brake is effectively reduced. The rotor assembly and the motor shaft rotate simultaneously and stop simultaneously, and when the stator assembly is fixed in the motor housing and brakes the rotor assembly, braking force can be transmitted through the set screw, so that the motor shaft is effectively braked.

In addition, the locking piece is arranged at the bottom of the stator assembly and is locked and fixed with the motor housing, and the stator assembly can be limited along the first direction and the second direction by combining the bearing.

Drawings

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it will be obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a schematic perspective view of an embodiment of a brake according to the present utility model;

FIG. 2 is a schematic perspective view of a brake according to an embodiment of the present utility model;

fig. 3 is a schematic view of a partial connection structure of a brake and a motor according to an embodiment of the present utility model.

In the figure:

rotor assembly-10; a hub-11; a protrusion-110; set screw-111; an elastic member-12; an armature plate-13; 14, riveting pieces; a first rivet 140; a second rivet-141;

stator assembly-20; a base-21; a bracket-22; permanent magnet steel-220; notch-221; a coil-23; a power supply connection-230; a trough plate shell-24; a locking member-25;

a motor shaft-30; motor housing-40; bearing-41.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.

For convenience of the following description, before describing a specific structure of the brake, the present application defines a first direction (Z) and a second direction (R) in conjunction with fig. 1. Wherein the first direction is the axial direction, such as the Z direction, of the brake when the brake is normally placed; the second direction is the radial direction, e.g. the R direction, of the brake when it is normally placed.

Referring to fig. 1 to 2, fig. 1 shows a schematic perspective view of an embodiment of a brake provided in the present application, and fig. 2 shows a schematic perspective view of an embodiment of a brake provided in the present application.

In some embodiments, the brake comprises: a rotor assembly 10 and a stator assembly 20.

The rotor assembly 10 includes a hub 11, and an elastic member 12 and an armature plate 13 sleeved on the hub 11 along a first direction (shown in a Z direction in fig. 1), wherein a protrusion 110 is provided on top of the hub 11 along the first direction (shown in the Z direction in fig. 1), a plurality of fastening screws 111 are provided on an outer circumference of the protrusion 110, and the elastic member 12 can deform and drive the armature plate 13 to displace along the first direction (shown in the Z direction in fig. 1).

The stator assembly 20 comprises a base 21 and a bracket 22 sleeved on the base 21, wherein the base 21 is at least partially sleeved on the periphery of the hub 11 along a first direction (shown in a Z direction in fig. 1); the support 22 is circumferentially provided with a plurality of permanent magnet steels 220, and the permanent magnet steels 220 can form a permanent magnetic field to deform the elastic member 12. .

In this embodiment, the elastic element 12 deforms under the action of the permanent magnetic field generated by the permanent magnetic steel 220, so as to drive the armature plate 13 connected with the elastic element 12 to displace along the first direction (shown in the Z direction in fig. 1). When the elastic member 12 is deformed, the armature plate 13 contacts the upper end of the stator assembly 20 in the first direction (Z direction shown in fig. 1) and generates friction torque, thereby braking the armature plate 13 and thus the rotor assembly 10. Illustratively, the elastic member 12 is a plate spring, so that the elastic member 12 is more easily tightly attached to the armature plate 13 and the hub 11, and the plate spring can generate larger deformation under the action of the magnetic attraction force of the permanent magnet steel 220, so as to drive the armature plate 13 to generate obvious displacement.

Further, the boss 110 of the hub 11 is circumferentially provided with set screws 111, and three set screws 111 are illustrated in fig. 1 by way of example, and are respectively located at the outer periphery of the boss 110 at equal intervals. When the rotor assembly 10 is installed and connected with an external device, the set screw 111 can be positioned through a shoulder of the external device, thereby greatly reducing the difficulty of assembling the brake, wherein when the rotor assembly 10 is braked by the stator assembly 20, the rotor assembly 10 transmits a braking force through the set screw 111 and brakes the external device.

Wherein, the hub 11 is at least partially sleeved in the base 21, so that the air gap between the stator assembly 20 and the rotor assembly 10 can be adjusted according to practical application.

In some embodiments, the brake is a keyless structure.

In this embodiment, the keyless structure refers to that no keyways are provided for the rotor assembly 10 and the stator assembly 20, and compared with the pulse vibration that causes air gap magnetic induction due to uneven magnetic resistance caused by the common arrangement of the keyways in the prior art, the moment of inertia can be effectively reduced. The rotor assembly 10 has a keyless structure, and the combination of the set screw 111 can effectively eliminate the backlash of the positive and negative braking of the rotor assembly 10.

In some embodiments, the HV hardness value of permanent magnet steel 220 ranges from HV430 to HV480 to promote the temperature resistance level and magnetic energy product of permanent magnet steel 220.

In the embodiment of the application, HV refers to vickers hardness, in the prior art, the actual magnetic performance of the permanent magnet steel 220 is affected by a specific manufacturing process of a manufacturing plant, and when a material of the permanent magnet steel 220 with HV hardness ranging from HV430 to HV480 is adopted, that is, the high-performance EH-level permanent magnet steel 220 can effectively improve the temperature resistance level and the magnetic energy product. Wherein, the higher the temperature resistance level is, the higher the environment that can make the stopper adapt to, namely when servo motor appears the temperature rise phenomenon, the stopper still can effectively brake servo motor.

In some embodiments, the stator assembly 20 further includes a coil 23 and a slot-disk housing 24, wherein the coil 23 is sleeved on the base 21 and is located above the permanent magnet steel 220 along a first direction (shown in a Z direction in fig. 1); the trough plate housing 24 is sleeved on the outer periphery of the base 21, wherein the coil 23 is positioned between the base 21 and the trough plate housing 24.

In this embodiment, the slotted disc housing 24 is configured to cover the coil 23, where the permanent magnet steel 220 is located at the bottom of the coil 23 along the first direction (shown in the Z direction in fig. 1), and when the permanent magnet steel 220 is magnetized, the permanent magnet steel 220 can form a permanent magnetic field along the first direction (shown in the Z direction in fig. 1), that is, form an N magnetic pole and an S magnetic pole along the first direction (shown in the Z direction in fig. 1), so as to generate a magnetic attraction force on the elastic element 12, so that the armature plate 13 contacts with the upper end surface of the stator assembly 20 (that is, the slotted disc housing 24). Thereby achieving a large braking torque.

Wherein the coil 23 further comprises a power connection 230, the power connection 230 being capable of passing through the support 22 to be connected with an external power source, such that the coil 23 is capable of generating a periodically varying electromagnetic field according to the external power source, wherein the electromagnetic field generated by the coil 23 and the permanent magnetic field generated by the permanent magnet steel 220 are balanced and opposite in magnetic polarity.

Illustratively, the coil 23 is connected to an external power source through a power connection 230 to control the external power source and thus the presence or absence of an electromagnetic field, wherein the electromagnetic field is opposite to the magnetic pole of the permanent magnetic field generated by the permanent magnet steel 220, so that the elastic member 12 is not affected by the magnetic attraction of the permanent magnetic field and is reset, and the armature plate 13 is driven away from the stator assembly 20, that is, no braking torque exists at this time. When the rotor assembly 10 is connected to an external device, the external device can be rotated at will.

The support 22 is provided with a notch 221, and the power connection wires 230 can extend out along the notch 221 and are connected with an external power supply, wherein the number of the power connection wires 230 is two, and the power connection wires are respectively connected with the positive pole and the negative pole of the external power supply.

In some embodiments, the elastic member 12 and the armature plate 13 are connected by a rivet 14, the rivet 14 including a first rivet 140 and a second rivet 141, the first rivet 140 being opposite in rivet direction to the second rivet 141 and disposed at intervals along the circumference of the elastic member 12, wherein the first rivet 140 and the second rivet 141 each have a tooth washer.

In this embodiment, the manner of riveting the first riveting member 140 and the second riveting member 141 can effectively promote the elastic member 12 to be tightly attached to the armature plate 13, so that the armature plate 13 can be displaced in time when the elastic member 12 is deformed. The riveting piece 14 is provided with a tooth-shaped gasket, so that the loosening phenomenon between the elastic piece 12 and the armature plate 13 can be effectively avoided.

Illustratively, a first rivet 140 is used to secure the spring 12 and the armature plate 13, and a second rivet 141 is used to secure the spring 12 and the hub 11.

In some embodiments, the bottom of the base 21 is circumferentially looped with a plurality of locking members 25, the locking members 25 being used to secure the stator assembly 20.

In this embodiment, the locking member 25 is disposed at the bottom of the base 21, so that the base 21 can be effectively limited in the first direction (shown in the Z direction in fig. 1) and the second direction (shown in the R direction in fig. 1), thereby fixing the stator assembly 20 and avoiding displacement of the stator assembly 20 due to braking torque.

Referring to fig. 3, fig. 3 is a schematic view showing a partial connection structure of an embodiment of a brake and a motor provided in the present application.

In some embodiments, the present application also provides an electric motor comprising the brake, motor shaft 30, and motor housing 40 described above.

The motor shaft 30 extends in a first direction (shown in the Z direction in fig. 1), the rotor assembly 10 of the brake is fixed to the motor shaft 30, and the motor shaft 30 is limited in the first direction (shown in the Z direction in fig. 1) by a set screw 111, wherein the motor shaft 30 rotates simultaneously with the rotor assembly 10 or stops simultaneously.

The motor housing 40 is provided with a bearing 41 therein, wherein the stator assembly 20 of the brake is positioned in the motor housing 40 and is limited in a second direction (R direction in FIG. 1) by the bearing 41 _。

In this embodiment, the rotor assembly 10 is fixed on the motor shaft 30 by the set screw 111, and the set screw 111 is positioned by the shoulder of the motor shaft 30, thereby effectively reducing the difficulty of mounting the brake. Wherein, the rotor assembly 10 rotates simultaneously with the motor shaft 30 and stops simultaneously, and when the stator assembly 20 is fixed in the motor housing 40 and brakes the rotor assembly 10, the braking force can be transmitted through the set screw 111, thereby effectively braking the motor shaft 30.

In addition, the locking member 25 is arranged at the bottom of the stator assembly 20 and locked and fixed with the motor housing 40, and is combined with the bearing 41, so that the stator assembly 20 can be limited in the first direction and the second direction.

The foregoing description is only of embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields using the descriptions and drawings of the present utility model should be carried within the scope of the present utility model.

Claims

1. A brake, comprising:

the rotor assembly comprises a hub, an elastic piece and an armature plate, wherein the elastic piece and the armature plate are sleeved on the hub along a first direction, a protruding part is arranged at the top of the hub along the first direction, a plurality of set screws are arranged on the periphery of the protruding part in a surrounding mode, and the elastic piece can deform and drive the armature plate to move along the first direction;

2. The brake of claim 1, wherein the brake is of a keyless construction.

3. The brake of claim 1, wherein the permanent magnet steel has HV hardness values ranging from HV430 to HV480 to promote temperature resistance and magnetic energy product of the permanent magnet steel.

4. A brake according to any one of claims 1 to 3, wherein the stator assembly further comprises a coil and a slotted disc housing, the coil being nested in the base and located above the permanent magnet steel in the first direction; the trough plate shell is sleeved on the periphery of the base, wherein the coil is located between the base and the trough plate shell.

5. The brake of claim 4, wherein the coil further comprises a power connection that is capable of passing through the bracket to connect with an external power source such that the coil is capable of generating a periodically varying electromagnetic field in accordance with the external power source, wherein the electromagnetic field generated by the coil and the permanent magnetic field generated by the permanent magnet steel are balanced and opposite in polarity.

6. The brake of claim 1, wherein the spring and the armature plate are connected by a rivet, the rivet comprising a first rivet and a second rivet, the first rivet being opposite in a rivet direction from the second rivet and disposed at intervals along a circumference of the spring, wherein the first rivet and the second rivet each have a tooth washer.

7. The brake of claim 1, wherein the bottom of the base is circumferentially looped with a plurality of locking members for securing the stator assembly.

8. The brake of claim 1, wherein the resilient member is a plate spring.

9. An electric machine comprising a brake as claimed in any one of claims 1 to 8, characterized by comprising:

the motor shaft extends along a first direction, the rotor assembly of the brake is fixed on the motor shaft, and the motor shaft is limited along the first direction through a set screw, wherein the motor shaft and the rotor assembly rotate simultaneously or stop simultaneously;

the motor housing is internally provided with a bearing, wherein a stator assembly of the brake is positioned in the motor housing and limited in a second direction through the bearing.