Rotary electromagnetic brake

Abstract

The utility model relates to the technical field of electromagnetic brakes, and provides a rotary electromagnetic brake which comprises a stator, an armature and a rotor assembly which are sequentially arranged in the axial direction, an electromagnetic coil is arranged in the stator, and a through shaft hole is formed in the middle of the stator; at least one conducting ring is arranged on the outer edge of the stator side by side, an external conductor is in sliding contact with the surface of the conducting ring, and the conducting ring is connected with the electromagnetic coil. According to the utility model, the stator can rotate along with the shaft, the problem of wire winding does not exist, and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic brakes, in particular to a rotary electromagnetic brake. Background Art

[0002] The electromagnetic brake is a device that uses electromagnetic force to achieve a braking effect. When the electromagnetic brake is powered on, the current passes through the coil to generate a magnetic field, so that the brake body (such as the brake pad) on the brake is acted upon by the electromagnetic force and is attracted to the brake disc, thereby releasing the brake disc. At this time, the drive shaft operates normally or starts with the brake disc. When the current of the electromagnetic brake is cut off, the brake pad is separated from the brake disc, and a friction torque is generated between the brake disc, the brake pad and the flange, causing the drive shaft to stop quickly. This friction torque is achieved because after the electromagnetic force disappears, the spring or other mechanical structure pushes the brake pad back to its original position, generating friction with the brake disc.

[0003] The stator of a traditional electromagnetic brake is fixed, the rotor is connected to the shaft, and the stator is connected to a control line for power control. If the stator rotates, the control line will be transmitted, so the stator cannot rotate. It cannot be used in some application scenarios, for example, when used in a helicopter. Therefore, a rotary electromagnetic brake is designed. Utility Model Content

[0004] The utility model aims to provide a rotary electromagnetic brake, which has the ability of the stator rotating with the shaft and expands its application range.

[0005] The embodiment of the utility model is realized through the following technical scheme: a rotary electromagnetic brake, comprising a stator, an armature and a rotor assembly arranged axially in sequence, an electromagnetic coil is arranged in the stator, and a through shaft hole is arranged in the middle of the stator; at least one conductive ring is arranged side by side on the outer edge of the stator, an external conductor is in sliding contact with the surface of the conductive ring, and the conductive ring is connected to the electromagnetic coil.

[0006] Furthermore, the conductive ring includes an insulating frame and a metal sheet, the insulating frame is fixedly installed on the outside of the stator, and the metal sheet is embedded in the insulating frame.

[0007] Furthermore, the conductive rings are provided with two arranged side by side in parallel, and the metal sheet and the insulating frame form a ring groove structure.

[0008] Furthermore, it also includes a cover and connecting screws, the rotor assembly is arranged between the armature and the cover, and the connecting screws pass through the cover to be connected and fixed to the stator.

[0009] Furthermore, a through hole is provided in the middle of the cover, and the outer shaft passes through the through hole to push the rotor assembly to frictionally contact with the armature.

[0010] Furthermore, the rotor assembly includes a rotor body and a friction disk, and the rotor body passes through the middle of the friction disk and is fixedly connected thereto.

[0011] Furthermore, a flat keyway is provided in the through-shaft hole.

[0012] The technical solution of the embodiments of the utility model has at least the following advantages and beneficial effects: the utility model arranges a conductive ring outside the stator in combination with the through-shaft hole of the stator, so that the external power supply can roll in contact with the conductive ring to power the electromagnetic coil, thereby achieving the effect that the stator can also rotate. The stator and the rotor can complete a variety of motion states, thereby expanding the scope of application and functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic diagram of the shaft side structure of a rotary electromagnetic brake provided in an embodiment of the utility model;

[0015] Figure 2 It is a schematic diagram of the back structure of the electromagnetic brake in the utility model;

[0016] Figure 3 for Figure 2 The cross-sectional view at AA in FIG.

[0017] Figure 4 It is a front view of the electromagnetic brake in the utility model.

[0018] Icon: 1- stator, 11- through shaft hole, 111- flat keyway, 2- conductive ring, 21- insulating frame, 22- metal sheet, 3- electromagnetic coil, 4- connecting screw, 5- armature, 6- rotor assembly, 61- friction disk, 62- rotor body, 7- cover, 71- through hole. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] The following is further described in conjunction with specific embodiments. Figure 1-Figure 4 As shown, this embodiment is a rotary electromagnetic brake, comprising a stator 1, an armature 5 and a rotor assembly 6 which are arranged axially in sequence, an electromagnetic coil 3 is arranged in the stator 1, and a through shaft hole 11 is arranged in the middle of the stator 1; at least one conductive ring 2 is arranged side by side on the outer edge of the stator 1, an external conductor is in sliding contact with the surface of the conductive ring 2, and the conductive ring 2 is connected to the electromagnetic coil 3; specifically, the conductive ring 2 is in rolling contact with a brush or a wire, so that the stator 1 and the armature 5 can rotate synchronously, but the brush is in continuous contact with the conductive ring 2, so that power can be supplied to the electromagnetic coil 3, the electromagnetic coil 3 controls the attraction of the armature 5, and the external connecting shaft is inserted into the through shaft hole 11 for connection. Compared with conventional electromagnetic brakes, the stator 1 and the rotor assembly 6 of the electromagnetic brake can both be rotated, and can be applied to some special usage scenarios, such as the rotating shaft of a helicopter, to control its rotation speed, etc.

[0023] like Figure 1 and Figure 3 As shown, the conductive ring 2 in this embodiment includes an insulating frame 21 and a metal sheet 22. The insulating frame 21 is fixedly installed on the outside of the stator 1, and the metal sheet 22 is embedded and installed in the insulating frame 21; the conductive ring 2 is provided with two control lines corresponding to the original electromagnetic brake, and they are arranged side by side in parallel. The insulating frame 21 avoids the influence between the two adjacent metal sheets 22. The metal sheet 22 and the insulating frame 21 form an annular groove structure, which is similar to an annular moving track to prevent the brush from axially offsetting the stator 1; specifically, the metal sheet 22 can be made of a material with good conductivity such as copper or graphite.

[0024] like Figure 3 As shown, this embodiment also includes a cover 7 and a connecting screw 4, the rotor assembly 6 is arranged between the armature 5 and the cover 7, and the connecting screw 4 passes through the cover 7 and is connected and fixed to the stator 1; specifically, the stator 1 and the cover 7 form an integrated structure and rotate synchronously, the rotor assembly 6 is installed between the cover and the armature 5, and a guide sleeve is also provided on the connecting screw 4, and the armature 5 can reciprocate linearly along the guide sleeve.

[0025] Reference Figure 3 As shown, a through hole 71 is provided in the middle of the cover 7, and the outer shaft passes through the through hole 71 to push the rotor assembly 6 to frictionally contact with the armature 5. The rotor assembly 6 includes a rotor body 62 and a friction plate 61, and the rotor body 62 passes through the middle of the friction plate 61 and is fixedly connected thereto; specifically, when the outer shaft extends into the through hole 71, the contact and separation between the rotor assembly 6 and the armature 5 can be controlled. Therefore, the electromagnetic brake can realize three states, that is, both the stator 1 and the rotor assembly 6 can rotate, or the stator 1 rotates but the rotor does not rotate, or the stator 1 does not rotate but the rotor assembly 6 rotates, and has multiple motion working states.

[0026] In order to control the rotation of the stator 1, the rotating shaft can be connected and fixed by setting a flat keyway 111 in the through shaft hole 11, so that the rotating shaft can complete synchronous rotation. Of course, the rotating shaft and the stator 1 can also be connected by a spline.

[0027] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotary electromagnetic brake, comprising a stator (1), an armature (5) and a rotor assembly (6) arranged in sequence in the axial direction, wherein an electromagnetic coil (3) is arranged in the stator (1), and characterized in that: A through-axis hole (11) is provided in the middle of the stator (1); At least one conductive ring (2) is arranged side by side on the outer edge of the stator (1), an external conductor is in sliding contact with the surface of the conductive ring (2), and the conductive ring (2) is connected to the electromagnetic coil (3).

2. The rotary electromagnetic brake according to claim 1, characterized in that: The conductive ring (2) comprises an insulating frame (21) and a metal sheet (22); the insulating frame (21) is fixedly mounted on the outside of the stator (1), and the metal sheet (22) is embedded in the insulating frame (21).

3. The rotary electromagnetic brake according to claim 2, characterized in that: The conductive ring (2) is provided with two arranged side by side in parallel, and the metal sheet (22) and the insulating frame (21) form a ring groove structure.

4. The rotary electromagnetic brake according to claim 1, characterized in that: It also comprises a cover (7) and connecting screws (4); the rotor assembly (6) is arranged between the armature (5) and the cover (7); the connecting screws (4) pass through the cover (7) and are connected and fixed to the stator (1).

5. The rotary electromagnetic brake according to claim 4, characterized in that: A through hole (71) is provided in the middle of the cover (7), and the outer shaft passes through the through hole (71) to push the rotor assembly (6) to frictionally contact with the armature (5).

6. The rotary electromagnetic brake according to claim 5, characterized in that: The rotor assembly (6) comprises a rotor body (62) and a friction disk (61), wherein the rotor body (62) passes through the middle of the friction disk (61) and is fixedly connected thereto.

7. The rotary electromagnetic brake according to claim 1, characterized in that: A flat keyway (111) is provided in the through-axis hole (11).

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