Sectional type sealed electromagnetic brake

Abstract

The utility model relates to the technical field of electromagnetic brakes, and particularly discloses a sectional type sealed electromagnetic brake which comprises a magnet yoke, an armature, a rotor and an end cover which are sequentially arranged in the axial direction, and further comprises a baffle ring connected with the edge of the outer side of the magnet yoke, and the armature and the rotor are arranged on the inner side of the baffle ring; elastic rolling supporting pieces are installed on the end faces of the two sides of the rotor, each elastic rolling supporting piece comprises a steel ball and a spring, and the steel balls are in rolling contact with the armature and the surface of the end cover respectively. According to the utility model, after the brake is released, the rotor has an automatic centering effect, and single-side friction is avoided.

Description

Technical Field

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

[0002] The spring-loaded electromagnetic brake is a common electromagnetic brake, usually composed of components such as a stator, rotor, electromagnetic coil, spring, armature, brake disc or brake wheel. The spring plays a key pressurizing role in the brake. When the power is off, the spring applies pressure to make the brake component and the rotating component in close contact, generating friction to achieve braking. When current is passed through the electromagnetic coil, the electromagnetic force generated will overcome the pressure of the spring, attracting the armature or brake arm, separating the brake component from the rotating component, releasing the brake, and allowing the equipment to operate normally. However, the rotor of most electromagnetic brakes retracts after being contacted by the armature, leaving a defect between the rotor and the armature, and one end face of the rotor will be in contact with the end cover. As a result, during the initial rotation of the rotor, there is contact friction on one side of the rotor, and the rotor cannot be centered. Utility Model Content

[0003] The purpose of the utility model is to provide a segmented sealed electromagnetic brake which can make the rotor automatically centered after the brake is released, thereby avoiding unilateral friction.

[0004] The utility model is realized through the following technical solutions: a segmented sealed electromagnetic brake, comprising a yoke, an armature, a rotor and an end cover arranged in axial sequence, and also comprising a retaining ring connected to the outer edge of the yoke, the armature and the rotor being arranged on the inner side of the retaining ring; elastic rolling support members are installed on both side end faces of the rotor, the elastic rolling support members comprising steel balls and springs, the steel balls respectively making rolling contact with the surfaces of the armature and the end cover.

[0005] Furthermore, at least two mounting holes are spaced around the surface of the rotor, the spring is arranged in the mounting hole, and one end of the spring is connected to a column, and the steel ball is embedded and installed in the other end of the column.

[0006] Furthermore, a set screw is connected between the retaining ring and the magnetic yoke, and sealing rings are embedded and installed on both side end surfaces of the retaining ring.

[0007] Furthermore, one end surface of the retaining ring is provided with a buckle groove adapted to the magnetic yoke.

[0008] Furthermore, the inner hole of the rotor is connected to a shaft sleeve, and the rotor and the shaft sleeve are connected by a spline.

[0009] Furthermore, friction plates are bonded to both sides of the rotor; the friction plates are arranged closely along the outer edge of the rotor.

[0010] Further, the blocking ring is made of plastic material.

[0011] The utility model discloses at least the following advantages and beneficial effects: the utility model discloses setting up the blocking ring provides support, sealing and waterproof dustproof simultaneously, through setting up the automatic centering mechanism of steel ball cooperation spring in the both sides of rotor, after the reset of armature, rotor can be reset automatically in the center by the spring force of both sides, avoid the problem of unilateral friction in the normal operation process of rotor. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the back side structure schematic diagram of segmented type sealed electromagnetic brake in the utility model;

[0013] Figure 2 It is the sectional view of A-A in Figure 1

[0014] Figure 3 It is the local schematic view of B in Figure 2

[0015] Figure 4 It is the structure front view schematic diagram of rotor in the utility model.

[0016] Fig. 1 - yoke, 2 - armature, 3 - rotor, 31 - friction plate, 32 - mounting hole, 4 - end cover, 5 - blocking ring, 51 - buckle groove, 6 - elastic rolling support piece, 61 - steel ball, 62 - cylinder, 63 - spring, 7 - set screw, 8 - sealing ring, 9 - shaft sleeve. DETAILED DESCRIPTION

[0017] The following is further illustrated in conjunction with specific embodiments, referring to Figures 1-4 ​​As shown, this embodiment is a segmented sealed electromagnetic brake, comprising a magnetic yoke 1, an armature 2, a rotor 3 and an end cover 4 arranged in axial sequence, and also comprising a retaining ring 5 connected to the outer edge of the magnetic yoke 1, the armature 2 and the rotor 3 are arranged on the inner side of the retaining ring 5; elastic rolling support members 6 are installed on both side end faces of the rotor 3, and the elastic rolling support members 6 include steel balls 61 and springs 63, and the steel balls 61 are in rolling contact with the surfaces of the armature 2 and the end cover 4 respectively; specifically, compared with the traditional magnetic yoke 1, its magnetic yoke 1 needs to be processed with a coil ring groove during the processing, and the retaining ring 5 is separated, and the processing cost as a separate individual is lower and easier, when this electromagnetic brake is in When the power is turned off and the brake is applied, the brake spring 63 pushes the armature 2 toward the side of the rotor 3, and the rotor 3 is squeezed between the armature 2 and the end cover 4. The steel ball 61 in contact with the end face of the armature 2 and the surface of the end cover 4 can compress the spring 63 to retract; and when the magnetic yoke 1 of the electromagnetic brake is energized to release the brake, the brake spring 63 pulls back the armature 2. Under the action of the elastic force of the spring 63, the rotor 3 will be relatively far away from the end cover 4 and separated from it, so that the rotor 3 is in a relatively middle position between the armature 2 and the end cover 4. Even if the rotor 3 is in the selection process, the steel ball 61 can achieve rolling contact with the end cover 4 and the armature 2, which greatly reduces the resistance during the initial start-up of the electromagnetic brake.

[0018] like Figure 3 and Figure 4 As shown, in this embodiment, at least two mounting holes 32 are provided around the surface of the rotor 3 at intervals, a spring 63 is provided in the mounting hole 32, and one end of the spring 63 is connected to a cylinder 62, and a steel ball 61 is embedded and installed in the other end of the cylinder 62; specifically, when the cylinder 62 is squeezed, the cylinder 62 squeezes the spring 63 to move back and forth in the mounting hole 32, and the steel ball 61 is embedded in the front end of the cylinder 62 and rotates, and cooperates with the multi-point support contact, so that the rotor 3 is subjected to a more uniform elastic force and has a higher degree of overlap with the rotor 3.

[0019] like Figure 2 As shown, in some embodiments, a set screw 7 is connected between the retaining ring 5 and the magnetic yoke 1, and a sealing ring 8 is embedded and installed on both side end faces of the retaining ring 5; specifically, the retaining ring 5 is connected to the magnetic yoke 1 by the set screw 7, which makes disassembly and assembly more convenient, and the retaining ring 5 cooperates with the sealing ring 8 to achieve a good sealing effect, preventing water and dust from entering the gap between the rotors 3.

[0020] like Figure 2 As shown, in order to facilitate installation and positioning and limit the radial displacement of the retaining ring 5, a buckle groove 51 adapted to the yoke 1 is provided on one end surface of the retaining ring 5; specifically, one end of the yoke 1 equipped with the electromagnetic coil is connected to the buckle groove 51.

[0021] It can be explained that the inner hole of the rotor 3 in this embodiment is connected to the shaft sleeve 9, and the rotor 3 and the shaft sleeve 9 are connected by a spline, while the shaft sleeve 9 and the motor shaft are connected by a flat key.

[0022] In order to improve the braking torque and friction of the rotor 3, the friction plates 31 are bonded on both sides of the rotor 3; the friction plates 31 are arranged close to the outer edge side of the rotor 3, and the friction plates 31 are relatively protruding, so that when the steel balls 61 on the rotor 3 are squeezed and compressed back, the armature 2 can be in contact and friction with the friction plates 31 on the rotor 3.

[0023] In order to reduce the overall weight of the brake, the stop ring 5 is made of plastic material, and the economic cost is lower, and the stop ring 5 can be manufactured by a mold.

[0024] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A segmented sealed electromagnetic brake comprising a yoke (1), an armature (2), a rotor (3) and an end cover (4) arranged in axial order, characterized in that: It also includes a retaining ring (5) connected to the outer edge of the magnetic yoke (1), and the armature (2) and the rotor (3) are arranged on the inner side of the retaining ring (5); Elastic rolling support members (6) are installed on both side end surfaces of the rotor (3). The elastic rolling support members (6) include steel balls (61) and springs (63). The steel balls (61) are in rolling contact with the surfaces of the armature (2) and the end cover (4) respectively.

2. The segmented sealed electromagnetic brake according to claim 1, characterized in that: At least two mounting holes (32) are spaced around the surface of the rotor (3), the spring (63) is arranged in the mounting hole (32), and one end of the spring (63) is connected to the column (62), and the steel ball (61) is embedded and installed in the other end of the column (62).

3. The segmented sealed electromagnetic brake according to claim 1, characterized in that: A set screw (7) is connected between the retaining ring (5) and the magnetic yoke (1), and sealing rings (8) are embedded and installed on both side end surfaces of the retaining ring (5).

4. The segmented sealed electromagnetic brake according to claim 3, characterized in that: One end surface of the retaining ring (5) is provided with a buckling groove (51) adapted to the magnetic yoke (1).

5. The segmented sealed electromagnetic brake according to claim 1, characterized in that: The inner hole of the rotor (3) is connected to a shaft sleeve (9), and the rotor (3) and the shaft sleeve (9) are connected by a spline.

6. The segmented sealed electromagnetic brake according to claim 1, characterized in that: Friction plates (31) are bonded to both sides of the rotor (3).

7. The segmented sealed electromagnetic brake according to claim 6, characterized in that: The friction plate (31) is arranged closely along the outer edge of the rotor (3).

8. The segmented sealed electromagnetic brake according to claim 1, characterized in that: The retaining ring (5) is made of plastic material.

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