CN216555073U

CN216555073U - Stator assembly with self-return function for electromagnetic brake

Info

Publication number: CN216555073U
Application number: CN202123281605.7U
Authority: CN
Inventors: 孙宏凯; 田广泽; 李想
Original assignee: Yinchuan Weili Transmission Technology Co ltd
Current assignee: Yinchuan Weili Transmission Technology Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-17
Anticipated expiration: 2031-12-24

Abstract

The utility model provides a stator module for electromagnetic braking ware that has self return function, relates to motor electromagnetic braking ware technical field for solve current motor electromagnetic braking ware bulky, weight heavy, and motor electromagnetic braking ware's armature produces the technical problem of movement jamming easily. In the stator assembly with the automatic return function for the electromagnetic brake, the coil is matched with the first installation groove of the shell, the first wave spring and the second wave spring are respectively assembled in the second installation groove of the shell, the armature is fixed on the shell through the hollow stud, the armature can slide relative to the hollow stud, and the distance between the shell and the armature can be adjusted by adjusting the screwing-in depth of the shell through adjusting the hollow stud so as to adjust the air gap of the stator assembly.

Description

Stator assembly with self-return function for electromagnetic brake

Technical Field

The utility model relates to the technical field of motor electromagnetic brakes, in particular to a stator assembly with an automatic return function for an electromagnetic brake.

Background

At present, in the prior art, the stator assembly of the conventional electromagnetic brake is mainly implemented by the following two schemes:

scheme 1: an electromagnetic coil assembly is sleeved in the shell of the electromagnetic brake, a compression spring is sleeved in the middle of the inner side of the shell, a soft magnet fixedly connected to the shell is arranged between the electromagnetic coil assembly and the compression spring, an armature is connected to the end of the electromagnetic coil assembly, one end, away from the soft magnet, of the armature is connected with a brake disc assembly, a limiting block is connected to the side of the brake disc assembly, and air gap adjusting pads are fixedly connected to the two side portions of the shell;

scheme 2: a lining and a cover plate of the electromagnetic brake are pressed on the upper surface of the stator through locking screws, a rotor, an armature and a spring are pressed on the stator through the cover plate, and the rotor is arranged between the armature and the cover plate; the armature is provided with a hole for the bushing to pass through; the upper surface of the stator is provided with a threaded hole for connecting a locking screw, an annular groove for installing a coil winding and an assembling hole for installing a spring, and the central axis of the coil winding is superposed with the central line of the stator; and a magnet passing hole is formed in the armature, the position of the magnet passing hole is matched with the installation area of the coil winding, and a base plate used for covering the magnet passing hole is further arranged between the armature and the rotor.

However, the inventor of the present application has found that, in the above-mentioned solution 1 of the prior art, due to the structural limitation of the spring, it is difficult to adjust the brake structure in a large range, and for adjusting the air gap between the armature and the housing, an air gap adjusting pad is used, the armature and the housing are not fixed, so that the use is inconvenient, and the armature is easily jammed during the movement; in the scheme 2, due to the defect of the arrangement position of the spring, the spring force borne by the armature is difficult to be uniformly distributed, so that the stress of the armature is inconsistent with the movement axis, and the movement of the armature is easy to be blocked.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a stator assembly with an automatic return function for an electromagnetic brake, which is used for solving the technical problems that the existing motor electromagnetic brake is large in size and heavy in weight, and an armature of the motor electromagnetic brake is easy to generate movement clamping stagnation.

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

a stator assembly with self-return functionality for an electromagnetic brake, comprising: the device comprises a shell, a coil, a first wave spring, a second wave spring, an armature and a hollow stud;

the coil is matched with the first mounting groove of the shell, the first wave spring and the second wave spring are respectively assembled in the second mounting groove of the shell, the armature is fixed on the shell through the hollow stud, the armature can slide relative to the hollow stud, and the distance between the shell and the armature can be adjusted by adjusting the screwing depth of the hollow stud in the shell so as to adjust the air gap of the stator assembly.

The coil is formed by sequentially winding enameled wires, and is cylindrical.

Specifically, one end of each of the first wave spring and the second wave spring is connected with the housing, and the other end of each of the first wave spring and the second wave spring is in contact with the armature;

when the stator assembly is installed, the central axes of the first wave spring and the second wave spring are overlapped with the central axis of the armature.

Furthermore, the first mounting groove is filled with heat conduction pouring sealant, and the heat conduction pouring sealant is used for sealing the coil into the first mounting groove of the shell and improving the heat conduction capability.

Furthermore, the first wave spring and the second wave spring adopt opposite wave springs in a multi-layer wave spring.

Still further, the spring external diameter of the first wave spring is phi 60 mm, the free height is 11.43mm, the working height is 5.4mm, the load is 737.3N, and the elastic coefficient is 122.28N/mm.

Still further, the spring external diameter of the second wave spring is phi 174 mm, the free height is 7.07 mm, the working height is 5.4mm, the load is 1142.9N, and the elastic coefficient is 684.373N/mm.

Compared with the prior art, the stator assembly with the automatic return function for the electromagnetic brake has the following advantages:

in the stator assembly with the automatic return function for the electromagnetic brake, which is provided by the utility model, as the coil is matched with the first mounting groove of the shell, the first wave spring and the second wave spring are respectively assembled in the second mounting groove of the shell, the armature is fixed on the shell through the hollow stud, and the armature can slide relative to the hollow stud, and the distance between the shell and the armature can be adjusted by adjusting the screwing depth of the hollow stud in the shell so as to adjust the air gap of the stator assembly (the length of the air gap is the length of the distance between the shell and the armature), the stator assembly with the automatic return function for the electromagnetic brake enables the central axis of the spring to be coincident with the movement direction of the armature, thus the spring force borne by the armature is positioned on the central axis of the armature, namely, the armature force bearing mode of the electromagnetic brake of a motor is improved through optimization, the problem of motion clamping stagnation caused by unbalanced armature stress in the prior art is well solved, and then the stator assembly is ensured to be capable of effectively reducing the axial length of the stator, the structure is simplified, the cost is reduced, and the installation is more convenient.

Drawings

Fig. 1 is a schematic structural diagram of a stator assembly with an automatic return function for an electromagnetic brake according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a stator in a stator assembly with an automatic return function for an electromagnetic brake according to an embodiment of the present invention.

Reference numerals:

1-a shell; 2-a coil; 3-a first wave spring; 4-a second wave spring; 5-an armature; 6-hollow stud; 7-heat conducting pouring sealant.

Detailed Description

For the convenience of understanding, the stator assembly with the self-return function for the electromagnetic brake provided by the embodiment of the utility model is described in detail below with reference to the drawings in the specification.

An embodiment of the present invention provides a stator assembly with an automatic return function for an electromagnetic brake, as shown in fig. 1, including: the coil comprises a shell 1, a coil 2, a first wave spring 3, a second wave spring 4, an armature 5 and a hollow stud 6; the coil 2 is matched with a first mounting groove of the shell 1, the first wave spring 3 and the second wave spring 4 are respectively assembled in a second mounting groove of the shell 1, the armature 5 is fixed on the shell 1 through the hollow stud 6, the armature 5 can slide relative to the hollow stud 6, and the distance between the shell 1 and the armature 5 can be adjusted by adjusting the screwing depth of the hollow stud 6 in the shell 1 so as to adjust the air gap of the stator assembly.

Compared with the prior art, the stator assembly with the automatic return function for the electromagnetic brake has the following advantages that:

in the stator assembly with the automatic return function for the electromagnetic brake provided by the embodiment of the utility model, as the coil 2 is matched with the first installation groove of the shell 1, the first wave spring 3 and the second wave spring 4 are respectively assembled into the second installation groove of the shell 1, the armature 5 is fixed to the shell 1 through the hollow stud 6, and the armature 5 can slide relative to the hollow stud 6, and the distance between the shell 1 and the armature 5 can be adjusted by adjusting the screwing depth of the hollow stud 6 in the shell 1 for adjusting the air gap of the stator assembly (the length of the air gap is the length of the distance between the shell and the armature), the stator assembly with the automatic return function for the electromagnetic brake provided by the embodiment of the utility model enables the central axis of the spring to be coincident with the movement direction of the armature, so that the spring force applied to the armature is positioned on the central axis of the armature, also through optimizing the armature atress mode that improves motor electromagnetic braking ware to well solve the unbalanced motion jamming problem that leads to of armature atress among the prior art, and then guarantee that stator module can reduce stator axial length effectively, simplify the structure, reduce cost makes the installation more convenient.

As shown in fig. 1, the coil 2 may be formed by sequentially winding enameled wires, and the coil 2 may have a cylindrical shape.

Specifically, as shown in fig. 1, one end of the first wave spring 3 and one end of the second wave spring 4 may be connected to the housing 1, and the other end may be in contact with the armature 5; when the stator assembly is installed, the central axes of the first wave spring 3 and the second wave spring 4 are superposed with the central axis of the armature 5; because the first wave spring 3 and the second wave spring 4 are positioned on the same axis with the installation position of the armature 5, the direction of the force is consistent with the movement direction of the armature, and therefore the armature 5 can move on the hollow stud 6 more smoothly.

Further, as shown in fig. 2, the first mounting groove may be filled with a heat conducting potting adhesive 7, and the heat conducting potting adhesive 7 may be used to seal the coil 2 to the first mounting groove of the housing 1 and improve the heat conducting capability, so as to greatly improve the protection capability of the coil 2, greatly enhance the heat conducting coefficient between the coil 2 and the housing 1, effectively improve the heat dissipation capability of the coil 2, and further enable the stator assembly to be applied to a more severe environment.

Furthermore, the first wave spring 3 and the second wave spring 4 may be opposite wave springs in a multi-layer wave spring, and the opposite wave springs can reduce the height of the springs by 50% compared with common compression springs, and simultaneously achieve the same load and deformation with the common compression springs, thereby greatly reducing the axial length of the housing 1 and the usage amount of spring materials, and further reducing the cost.

Still further, the spring outer diameter of the first wave spring 3 may be phi 60 mm, the free height may be 11.43mm, the working height may be 5.4mm, the load may be 737.3N, and the spring constant may be 122.28N/mm.

Still further, the spring outer diameter of the second wave spring 4 may be phi 174 mm, the free height may be 7.07 mm, the working height may be 5.4mm, the load may be 1142.9N, and the spring constant may be 684.373N/mm.

The stator assembly with the automatic return function for the electromagnetic brake, provided by the embodiment of the utility model, is characterized in that current is introduced into the coil 2, the coil 2 generates a magnetic field, the magnetic field and the armature 5 form a closed magnetic loop along the shell 1, the magnetic loop has the characteristic that the magnetic loop passes through according to the shortest path due to the characteristic of the magnetic loop, the armature 5 generates magnetic pulling force, the magnetic pulling force overcomes the spring force acting on the armature 5, the armature 5 moves towards the shell 1 and compresses the spring again, at the moment, the armature 5 releases the pressing on a friction disc of the electromagnetic brake, and a motor is in a brake release state; when the current in the coil 2 is removed, the magnetic pulling force acting on the armature 5 disappears, so that the armature 5 returns to a state far away from the housing 1 under the action of the spring force, and the armature 5 presses the friction disc, so that the motor is in a braking state.

The stator assembly with the self-return function for the electromagnetic brake provided by the embodiment of the utility model mainly has the following advantages:

the installation of the spring and the armature is in a uniform axis, and the movement direction of the armature is also in the axis, so that the movement of the armature is more free and smooth, the clamping stagnation is effectively reduced, and the operation efficiency of the armature is improved;

the two groups of wave springs provide force far away from the shell for the armature, and due to the characteristics of the wave springs, the principle of the characteristics of the springs in a larger range can be made in a similar size, so that the stator component can provide a larger range of braking torque for the brake, and the application scene is greatly improved;

the spring adopts a wave spring with opposite tops, so that the height of the spring can be greatly reduced, the material is saved, the cost is reduced, meanwhile, the final braking torque can be adjusted by adjusting the installation mode and the characteristics of the spring, and the brake device is compact in structure and convenient to install;

the coil is subjected to heat conduction pouring sealant encapsulation treatment, so that the protection grade of the coil is improved, the heat conduction capability between the coil and the shell is improved, and the stator assembly can have a wider application space;

for the electromagnetic brake, the stator assembly belongs to an optional component, so that a customer can select the electromagnetic brake more conveniently and rapidly, and due to the wider spring force range, the stator assembly has wider adaptability and smaller volume, and is more convenient to install.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A stator assembly with self-return for an electromagnetic brake, comprising: the device comprises a shell, a coil, a first wave spring, a second wave spring, an armature and a hollow stud;

2. The stator assembly with the self-return function for the electromagnetic brake as claimed in claim 1, wherein the coil is formed by sequentially winding enameled wires, and the coil has a cylindrical shape.

3. The stator assembly with the self-return function for an electromagnetic brake of claim 1, wherein one end of the first wave spring and the second wave spring is connected with the housing, and the other end is in contact with the armature;

4. The stator assembly with self-return function for an electromagnetic brake of any one of claims 1-3, wherein the first mounting slot is filled with a heat conducting potting adhesive, and the heat conducting potting adhesive is used to seal the coil into the first mounting slot of the housing and improve heat conductivity.

5. The stator assembly with self-return function for an electromagnetic brake of claim 1, wherein the first wave spring and the second wave spring employ opposing wave springs of a multi-layer wave spring.

6. The stator assembly with self-return function for electromagnetic brake as claimed in claim 5, characterized in that the spring outer diameter of the first wave spring is phi 60 mm, the free height is 11.43mm, the working height is 5.4mm, the load is 737.3N, and the spring constant is 122.28N/mm.

7. The stator assembly with self-return function for electromagnetic brake as claimed in claim 5, characterized in that the spring outer diameter of the second wave spring is phi 174 mm, the free height is 7.07 mm, the working height is 5.4mm, the load is 1142.9N, and the elastic modulus is 684.373N/mm.