Electromagnetic brake

Abstract

The utility model discloses an electromagnetic brake which comprises a friction plate connected to a motor, an armature and a brake disc which are arranged on the two sides of the friction plate, and a brake coil shell arranged on the side, away from the brake disc, of the armature, and an extension plate extends out of the side, facing the brake coil shell, of the brake disc. And the end part of the extension plate is matched with the end surface of the brake coil shell in a pushing manner so as to define mounting spaces of the friction plate and the armature. Thereby, the extension plate directly abuts the end face of the brake coil housing at its specific length as a reference length, which directly determines the total distance from the brake coil housing (reference surface) to the brake disc. Compared with the prior art in which one-by-one measurement is needed, multiple gaps between the friction plate and the brake disc, between the armature and the friction plate and the like are calculated to realize assembly. According to the embodiment of the invention, the overall space gap is limited based on the length of the extension plate, so that the assembly efficiency is remarkably improved, and the overall construction difficulty is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of braking equipment technology, and in particular to an electromagnetic brake. Background Technology

[0002] Electromagnetic brakes are commonly used braking devices in machinery, mainly composed of electromagnets, armatures, and friction pads. When the electromagnetic coil generates electromagnetic force, it attracts the armature. After the power is cut off, the spring pushes the armature and friction pads against friction components such as brake discs or brake drums to brake.

[0003] However, during the manufacturing process of electromagnetic brakes, the gaps between the armature, stator, and friction plates need to be adjusted to a certain range to meet braking requirements. For example, the applicant's prior patent CN219570683U sets multiple discs such as the armature, friction plates, and spline sleeves in the axial direction of the brake; during manufacturing, the gaps between each component need to be calculated strictly according to the processing requirements for assembly, and the existing electromagnetic brake structure is relatively complex, which also increases the processing difficulty.

[0004] In summary, there is still room for improvement in the existing electromagnetic brake structure. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electromagnetic brake with an optimized structure that makes it simpler and easier to process and assemble.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] An electromagnetic brake includes a friction pad connected to a motor, an armature and a brake disc disposed on both sides of the friction pad, and a brake coil housing disposed on the side of the armature away from the brake disc. An extension plate extends from the side of the brake disc toward the brake coil housing, and the end of the extension plate abuts against the end face of the brake coil housing to define the mounting space for the friction pad and the armature.

[0008] The effect is that the extension plate, with its specific length, directly abuts against the end face of the brake coil housing as a reference length. This reference length directly determines the total distance from the brake coil housing (reference surface) to the brake disc. Compared to the prior art, which requires measuring, calculating, and finely adjusting multiple gaps such as between the friction pads and the brake disc, and between the armature and the friction pads, to meet design requirements, this embodiment significantly improves assembly efficiency and effectively reduces overall construction difficulty by limiting the overall spatial gap based on the length of the extension plate.

[0009] Furthermore, the motor includes a motor housing, and the brake coil housing is part of the motor housing to form the motor housing.

[0010] Furthermore, a plurality of bolt connecting lugs are provided on the periphery of the brake coil housing, the bolt connecting lugs being adapted to be bolted to other parts of the motor housing.

[0011] Furthermore, the brake disc bends and extends the extension plate from its circumferential edge. After the end of the extension plate abuts against the brake coil housing, the extension plate and the brake disc cover the friction pad and armature.

[0012] Furthermore, a first boss extends from the brake coil housing. The outer diameter of the first boss matches the inner diameter defined by the extension plate. After the end of the extension plate abuts against the end face of the brake coil housing, the first boss mates with the inner circumferential surface of the extension plate.

[0013] Furthermore, a fastening bolt is provided through the brake disc, and at least a portion of the fastening bolt is screwed into the brake coil housing, thereby connecting and fixing the brake disc to the brake coil housing.

[0014] Furthermore, the fastening bolt also penetrates the armature.

[0015] Furthermore, the output shaft of the motor is provided with a hub, the disc surface of the hub is perpendicular to the output shaft, and the friction plate is sleeved on the outer periphery of the hub.

[0016] Furthermore, the brake coil housing extends a second boss on the side away from the friction plate, and the outer circumferential diameter of the second boss matches the inner circumferential diameter of the motor housing. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural schematic diagram of an electromagnetic brake and an output shaft according to some embodiments of this application;

[0018] Figure 2 This is a schematic diagram of an electromagnetic brake structure according to some embodiments of this application;

[0019] In the picture:

[0020] 10-Electromagnetic brake;

[0021] 11-Brake coil housing, 111-First boss, 112-Second boss, 113-Bolt lug, 12-Armature, 13-Friction pad, 131-Hub, 14-Brake disc, 141-Extension plate, 15-Spring, 16-Electromagnetic coil

[0022] 20 - Output shaft;

[0023] 30 - Fastening bolt. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] See Figures 1-2 This utility model provides an electromagnetic brake 10.

[0026] Combination Figure 1 The electromagnetic brake 10 includes a brake coil housing 11, an armature 12, a friction pad 13, and a brake disc 14 arranged sequentially along the output shaft 20 of a motor (not shown). The friction pad 13 is connected to the output shaft 20 of the motor. The armature 12 and the brake disc 14 are located on opposite sides of the friction pad 13. Two mounting slots are constructed within the brake coil housing 11 for mounting a spring 15 and an electromagnetic coil 16, respectively. The spring 15 and the electromagnetic coil 16 are adjacent to the armature 12. Therefore, the brake disc 14 is fixed to the output shaft 20 of the motor via a brake hub 131. One side of the friction pad 13 faces the brake disc 14, allowing it to brake against the armature 12 through friction. The output shaft 20 of the motor is equipped with a hub 131, the disc surface of which is perpendicular to the output shaft 20. The friction pad 13 is fitted around the outer circumference of the hub 131 to connect the output shaft 20 of the motor to the friction pad 13.

[0027] In detail, when the motor is de-energized or braking is required, the spring 15 pushes the armature 12 along the axis of the output shaft 20 to press against the friction plate 13, thereby pressing the friction plate 13 tightly against the brake disc 14. The frictional resistance between the friction plate 13 and the brake disc 14 generates a braking torque, preventing the output shaft 20 from rotating and achieving braking. When the motor is energized and braking needs to be released, the electromagnetic coil 16 is energized to generate electromagnetic attraction; this electromagnetic attraction overcomes the spring force of the spring 15 and attracts the armature 12 towards the electromagnetic coil 16 (i.e., away from the friction plate 13), thereby releasing the pressure on the friction plate 13. A gap is created between the friction plate 13 and the brake disc 14, the friction disappears, the braking is released, and the output shaft 20 can rotate freely.

[0028] like Figure 1As shown, the brake disc 14 extends an extension plate 141 along the side facing the motor, and the end face of the extension plate 141 abuts against the end face of the brake coil housing 11. In this way, the extension plate 141, by extending from the brake disc 14 to the end face of the brake coil housing 11, can define the distance between the brake disc 14 and the motor brake coil housing 11 based on its extension length, thereby determining the mounting space of the friction plate 13 and the armature 12.

[0029] Therefore, the extension plate 141, with its specific length, directly abuts against the end face of the brake coil housing 11 as a reference length. This reference length directly determines the total distance from the brake coil housing 11 (reference surface) to the brake disc 14. Thus, the space for the stacking of the core functional components of the entire electromagnetic brake 10, such as the brake disc 14, friction pads 13, armature 12, and the spring 15 and electromagnetic coil 16 within the brake coil housing 11 along the axial direction of the output shaft 20, is substantially limited by the length of the extension plate 141. During assembly, simply ensuring that the extension plate 141 abuts against the end face of the brake coil housing 11 allows for the determination of the overall axial mounting distance and relative positional relationship of all stacked components at once.

[0030] Compared to existing technologies that require individual measurement, calculation, and fine adjustment of numerous minute gaps, such as between the friction plate 13 and brake disc 14, between the armature 12 and friction plate 13, and between the armature 12 and electromagnetic coil 16 / spring 15, to meet design requirements, this embodiment significantly improves assembly efficiency and effectively reduces overall construction difficulty by defining the overall spatial gap based on the length of the extension plate 141.

[0031] Furthermore, the electromagnetic brake 10 is usually installed on the motor to brake the rotation of the motor. During assembly, the brake coil housing 11 needs to be fitted together to achieve a fixed connection. However, this method results in a complex, bulky structure that is not easy to install.

[0032] Therefore, in some embodiments, the brake coil housing 11 is used as the motor housing, and the brake coil housing 11 constitutes the motor housing.

[0033] Specifically, the motor housing typically includes a sidewall constructed as a column (not shown in the figure) and end plates disposed at both ends of the sidewall. In this embodiment, the brake coil housing 11 serves as an end plate to participate in forming the motor housing. To make the brake coil housing 11 suitable for connection with the sidewall, in Figure 2 In the example shown, three bolt lugs are provided around the periphery of the brake coil housing 11, making the bolt lugs suitable for bolting to other parts of the motor housing. This reduces the overall number of parts in the motor and electromagnetic brake 10, lowering assembly difficulty and cost.

[0034] It is worth noting that the extension plate 141 in this embodiment can be as follows: Figure 1 The flange provided at the edge can also be a plate extending from a non-edge area; similarly, it can be a discontinuous plate, or even other structural forms that perform the same function, such as columns, strips, etc. All of the above examples should fall within the protection scope of this application. Correspondingly, replacing the brake disc 14 with a component of the same type as the brake hub 131 also falls within the protection scope of this application.

[0035] For example Figure 1 As shown, the brake disc 14 bends and extends an annular extension plate 141 along its circumference. Since the annular extension plate 141 and the brake disc form an outer cover structure, after the extension plate 141 abuts against the end face of the brake coil, the brake disc 14 and the extension plate 141 can cover the friction pad 13 and the armature 12. Thus, the outer cover formed by the extension plate 141 extending from the brake disc 14, after its end abuts against the brake coil housing 11, encloses the various components therein, so as to avoid exposing the internal components.

[0036] like Figure 2 As shown, the brake coil housing 11 extends a first boss 111 on the side facing the brake disc 14. The outer diameter of the first boss 111 matches the inner diameter defined by the extension plate 141. The end face of the extension plate 141 abuts against the end face of the brake coil housing 11 next to the first boss 111, so that the first boss 111 is embedded in the annular space formed by the extension plate 141. The first boss 111 mates with the inner circumferential surface of the extension plate 141, thereby quickly completing the coaxiality positioning of the brake disc 14 and the brake coil housing 11 in the axial direction based on this mating relationship during assembly.

[0037] Furthermore, the brake coil housing 11 extends a second protrusion 112 on the side away from the friction plate 13. Similarly, the outer diameter of the second protrusion 112 matches the inner diameter of the side wall in the motor housing, so as to quickly position and match the brake coil housing 11 with other parts of the motor housing, and achieve coaxial positioning and matching.

[0038] In some embodiments, the brake disc 14 is connected to the brake coil housing 11 by fastening bolts 30, which pass through the brake disc 14 and are at least partially screwed into the brake coil housing 11. Thus, during manufacturing, fixing the brake disc 14 to the brake coil housing 11 with the fastening bolts 30 achieves a push-fit engagement between the brake coil housing 11 and the extension plate 141.

[0039] Furthermore, the fastening bolt 30 also passes through the armature 12, thereby coaxially arranging the armature 12, friction disc, and brake coil housing 11 through a single fastening bolt 30. Its structure is simple and easy to assemble.

[0040] The above are merely preferred embodiments of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. An electromagnetic brake, comprising a friction pad (13) connected to a motor, an armature (12) and a brake disc (14) disposed on both sides of the friction pad (13), and a brake coil housing (11) disposed on the side of the armature (12) away from the brake disc (14), characterized in that: The brake disc (14) extends an extension plate (141) toward the side of the brake coil housing (11), and the end of the extension plate (141) abuts against the end face of the brake coil housing (11) to define the installation space of the friction plate (13) and the armature (12).

2. The electromagnetic brake according to claim 1, characterized in that, The motor includes a motor housing, and the brake coil housing (11) is part of the motor housing to form the motor housing.

3. The electromagnetic brake according to claim 2, characterized in that, A plurality of bolt connecting lugs are provided on the periphery of the brake coil housing (11), the bolt connecting lugs being adapted to be bolted to other parts of the motor housing.

4. The electromagnetic brake according to claim 1, characterized in that, The brake disc (14) bends out the extension plate (141) from its circumferential edge. After the end of the extension plate (141) abuts against the brake coil housing, the extension plate (141) and the brake disc (14) cover the friction plate (13) and armature (12).

5. The electromagnetic brake according to claim 4, characterized in that, A first boss (111) extends from the outer shell of the brake coil. The outer diameter of the first boss (111) matches the inner diameter defined by the extension plate (141). After the end of the extension plate (141) abuts against the end face of the brake coil shell, the first boss (111) engages with the inner circumferential surface of the extension plate (141).

6. The electromagnetic brake according to claim 1, characterized in that, The brake disc (14) is provided with a fastening bolt (30) through it. At least part of the fastening bolt (30) is screwed into the brake coil housing (11) and connects and fixes the brake disc (14) to the brake coil housing (11).

7. The electromagnetic brake according to claim 6, characterized in that, The fastening bolt (30) also passes through the armature (12).

8. The electromagnetic brake according to claim 1, characterized in that, The output shaft (20) of the motor is provided with a hub (131), the disc surface of the hub (131) is perpendicular to the output shaft (20), and the friction plate (13) is sleeved on the outer periphery of the hub (131).

9. The electromagnetic brake according to claim 1, characterized in that, The brake coil housing (11) extends a second boss (112) on the side away from the friction plate (13), and the outer diameter of the second boss (112) matches the inner diameter of the motor housing.

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