Dual-redundancy brake

Abstract

The utility model relates to the field of brakes, and particularly discloses a dual-redundancy brake which comprises a rotor, an electric pushing unit and a braking unit are arranged on the two sides of the rotor respectively, the electric pushing unit comprises a movable plate, the braking unit comprises an armature and a braking magnet yoke, and the rotor is arranged between the movable plate and the armature; a brake gap is reserved between the armature and the brake magnet yoke, a pull-back gap is formed in the side, away from the rotor, of the movable plate, the pull-back gap is larger than the brake gap, and when the armature and the movable plate abut against the rotor, the electric push unit attracts the movable plate to pull back so as to release the brake state of the rotor. According to the utility model, the brake contact of the rotor can be released when the brake cannot normally attract the movable plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of brake, specifically, a kind of double redundancy brake. BACKGROUND

[0002] Electromagnetic brake is a kind of mechanical device using electromagnetic effect to realize brake function, excitation coil generates magnetic field when energized, and magnetic yoke attracts armature, and armature realizes brake through coupling piece.Electromagnetic force is generated when energized, and armature is separated from brake disc, so that transmission shaft can be normally operated or started;When de-energized, electromagnetic force disappears, and spring presses armature, so that friction torque is generated between brake disc, armature and flange, and transmission shaft is rapidly stopped.

[0003] However, if the conventional brake coil fails, the on-off power cannot normally attract the moving plate, and the brake contact between the moving plate and the rotor is always maintained, so that the rotor cannot be restored to normal rotation, resulting in brake release failure. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of double redundancy brake can guarantee when brake cannot normally attract moving plate, brake contact of rotor can also be released.

[0005] The utility model realizes by the following technical scheme: a kind of double redundancy brake, including rotor, electric push unit and brake unit are respectively arranged on the both sides of the rotor, the electric push unit includes movable plate, the brake unit includes armature and brake magnet yoke, the rotor is located between the movable plate and the armature;Brake gap is left between the armature and the brake magnet yoke, the side of the movable plate away from the rotor is equipped with pullback gap, and the pullback gap is greater than the brake gap, when the armature and the movable plate abut against the rotor, the electric push unit attracts the movable plate and pulls back to release the brake state of the rotor.

[0006] Further, the electric push unit includes pullback magnet yoke, pullback spring is connected between the pullback magnet yoke and the movable plate, brake spring is connected between the brake magnet yoke and the armature.

[0007] Further, it further includes limiting sleeve, the end surface of the limiting sleeve is respectively abutted with the end surface of the pullback magnet yoke and brake magnet yoke;First limit gap and second limit gap are respectively arranged on the both sides of the limiting sleeve, and the depth of the first limit gap is greater than the thickness of the movable plate, the depth of the second limit gap is greater than the thickness of the armature, the outside of the movable plate is clamped into the first limit gap, and the outside of the armature is clamped into the second limit gap.

[0008] Further, the elastic force of the pullback spring is greater than the elastic force of the brake spring.

[0009] Further, a connecting screw is arranged to connect the brake magnet yoke and the pull-back magnet yoke, and the connecting screw passes through the limiting sleeve.

[0010] Further, a connecting shaft is arranged at the middle part of the rotor, and a bearing is arranged between the connecting shaft and the brake magnet yoke.

[0011] Further, the rotor and the connecting shaft are connected by spline.

[0012] Further, the rotor is provided with friction plates on both sides.

[0013] The technical scheme of the utility model has at least the following advantages and beneficial effects: when the rotor is stuck and cannot be unbraked, the movable plate is attracted by the electric push unit, the distance between the movable plate and the armature is increased, the contact with the rotor is removed, the brake is restored to normal use, and the utility model has a safety function. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Fig. 1 is a structural schematic view of a double-redundancy brake in the utility model;

[0015] Figure 2 Fig. 2 is a partial enlarged view of A in Fig. 1. Figure 1

[0016] Reference signs: 1-electric push unit, 11-movable plate, 12-pull-back magnet yoke, 13-pull-back spring, 2-brake unit, 21-brake magnet yoke, 22-armature, 23-brake spring, 3-rotor, 31-friction plate, 4-limiting sleeve, 41-first limiting notch, 42-second limiting notch, 5-connecting shaft, 6-bearing, 7-connecting screw, 8-pull-back gap, 9-brake gap. DETAILED DESCRIPTION

[0017] The following will be further described in combination with specific embodiments, with reference to the drawings. Figures 1-2 ​As shown in the drawings, the embodiment is a dual-redundancy brake, comprising a rotor 3, an electric push unit 1 and a brake unit 2 arranged on the two sides of the rotor 3 respectively, the electric push unit 1 comprising a movable plate 11, the brake unit 2 comprising an armature 22 and a brake magnetic yoke 21, the rotor 3 being arranged between the movable plate 11 and the armature 22; a brake gap 9 is left between the armature 22 and the brake magnetic yoke 21, a back-pulling gap 8 is arranged on the side of the movable plate 11 away from the rotor 3, and the back-pulling gap 8 is larger than the brake gap 9; when the armature 22 and the movable plate 11 abut against the rotor 3, the electric push unit 1 attracts and pulls back the movable plate 11 to release the brake state of the rotor 3. Specifically, the movable plate 11 axially displaceable is additionally arranged on the other side of the rotor 3, when the brake magnetic yoke 21 can normally electrify and attract the armature 22, the armature 22 is retracted, and the distance between the movable plate 11 and the armature 22 is larger than the thickness of the rotor 3 due to the brake gap 9, so that the rotor 3 can normally rotate; when the armature 22 cannot normally attract back, the rotor 3 is abutted by the movable plate 11 and the armature 22 and cannot move, the electric push unit 1 pulls back the movable plate 11 to displace a back-pulling gap 8, so that the distance between the movable plate 11 and the armature 22 is increased, and the rotor 3 can normally rotate, thereby playing a safety role.

[0018] As shown in the drawings, Figure 1 and Figure 2 As shown in the drawings, the embodiment further comprises a limiting sleeve 4, the two ends of the limiting sleeve 4 abutting against the end faces of a back-pulling magnetic yoke 12 and the brake magnetic yoke 21 respectively; the two sides of the limiting sleeve 4 are respectively provided with a first limiting gap 41 and a second limiting gap 42, the depth of the first limiting gap 41 is larger than the thickness of the movable plate 11, the depth of the second limiting gap 42 is larger than the thickness of the armature 22, the outer side of the movable plate 11 is clamped into the first limiting gap 41, and the outer side of the armature 22 is clamped into the second limiting gap 42.

[0019] As an option, as shown in the drawings, Figure 1 In the electric push unit 1 in the embodiment, a back-pulling magnetic yoke 12 is connected with the movable plate 11 through a back-pulling spring 13, and a brake magnetic yoke 21 is connected with the armature 22 through a brake spring 23, the elastic force of the back-pulling spring 13 is larger than that of the brake spring 23; specifically, because the elastic force of the back-pulling spring 13 is larger, the movable plate 11 is abutted to the bottom of the first limiting gap 41, so that the movable plate 11 cannot move axially when the armature 22 is frictionally braked with the rotor 3, and the braking effect is poor.

[0020] As shown in the drawings, Figure 1 The embodiment further comprises a connecting screw 7, the connecting screw 7 is used to connect the brake magnetic yoke 21 and the back-pulling magnetic yoke 12, and the connecting screw 7 passes through the limiting sleeve 4; specifically, the three components are connected through the connecting screw 7 to become an integrated structure.

[0021] In addition, a connecting shaft 5 is provided in the middle of the rotor 3, and a bearing 6 is provided between the connecting shaft 5 and the brake yoke 21. The bearing 6 is used for connection and installation, and the connecting shaft 5 has a certain length. The bearing 6 provides rolling support, making the rotation of the connecting shaft 5 and the rotor 3 smoother.

[0022] Optionally, the rotor 3 and the connecting shaft 5 are connected by a spline, which makes disassembly and installation more convenient.

[0023] like Figure 2 As shown, in order to improve the friction and braking effect of rotor 3, friction plates 31 are bonded to both sides of rotor 3.

[0024] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-redundant brake, comprising a rotor (3), characterized in that: The rotor (3) is provided with an electric propulsion unit (1) and a braking unit (2) on both sides respectively. The electric propulsion unit (1) includes a movable plate (11), and the braking unit (2) includes an armature (22) and a braking yoke (21). The rotor (3) is located between the movable plate (11) and the armature (22). A braking gap (9) is left between the armature (22) and the braking yoke (21). The movable plate (11) is provided with a pull-back gap (8) on the side away from the rotor (3), and the pull-back gap (8) is greater than the braking gap (9). When the armature (22) and the movable plate (11) abut against the rotor (3), the electric propulsion unit (1) pulls the movable plate (11) back to release the braking state of the rotor (3).

2. The dual-redundant brake according to claim 1, characterized in that: The electric propulsion unit (1) includes a pull-back magnetic yoke (12), a pull-back spring (13) is connected between the pull-back magnetic yoke (12) and the movable plate (11), and a brake spring (23) is connected between the brake magnetic yoke (21) and the armature (22).

3. The dual-redundant brake according to claim 2, characterized in that: It also includes a limiting sleeve (4), the two ends of which abut against the end faces of the pull-back magnetic yoke (12) and the braking magnetic yoke (21), respectively; The limiting sleeve (4) has a first limiting notch (41) and a second limiting notch (42) on both sides, and the depth of the first limiting notch (41) is greater than the thickness of the movable plate (11), and the depth of the second limiting notch (42) is greater than the thickness of the armature (22). The outer side of the movable plate (11) is inserted into the first limiting notch (41), and the outer side of the armature (22) is inserted into the second limiting notch (42).

4. The dual-redundant brake according to claim 2, characterized in that: The elastic force of the pull-back spring (13) is greater than that of the brake spring (23).

5. The dual-redundant brake according to claim 3, characterized in that: It also includes a connecting screw (7) for connecting the braking yoke (21) and the pullback yoke (12), and the connecting screw (7) passes through the limiting sleeve (4).

6. The dual-redundant brake according to claim 1, characterized in that: The rotor (3) is provided with a connecting shaft (5) in the middle, and a bearing (6) is provided between the connecting shaft (5) and the brake yoke (21).

7. The dual-redundant brake according to claim 6, characterized in that: The rotor (3) and the connecting shaft (5) are connected by a spline.

8. The dual-redundant brake according to claim 1, characterized in that: Friction plates (31) are bonded to both sides of the rotor (3).

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