Flat type permanent magnet brake

Abstract

The utility model discloses a flat type permanent magnet brake which comprises a brake body formed by coaxially arranging an outer flange, an armature, an inner flange, an inner magnetic pole, a permanent magnet and a magnetic shell, a pre-stretched elastic element is arranged between the outer flange and the armature, and the elastic element continuously pulls the armature to move towards the outer flange; a containing groove is formed in the magnetic shell, a permanent magnet and a coil are arranged in the containing groove, the diameter of the permanent magnet is larger than that of the coil, and the permanent magnet is arranged on the outer side of the coil; the permanent magnet is further fixedly connected with an inner magnetic pole, an inner flange is further arranged on the containing groove, the containing groove forms a closed space through the inner flange, the inner magnetic pole and the permanent magnet, the closed space is provided with at least one gap, and the coil is arranged in the closed space. The overall dimension of the geometry of the brake is not damaged, the thickness of the brake can be greatly reduced, the output braking force is large, and the performance is more stable.

Description

Technical Field

[0001] This utility model belongs to the field of brake technology, specifically relating to a flat permanent magnet brake. Background Technology

[0002] The power-off brake mainly uses the magnetic lines of force of the permanent magnet to form a magnetic yoke surface to generate an attractive force, thereby attracting the brake pads, frame, etc. to achieve braking force output; and by energizing the coil, a magnetic field opposite to the magnetic lines of force of the permanent magnet is generated, which cancels the magnetic force of the permanent magnet, that is, the magnetic lines of force of the magnetic yoke surface are reduced or disappear, and the attractive force on the brake pads or frame is lost, thereby achieving braking and unlocking.

[0003] However, currently the permanent magnets and coils are vertically stacked, so it is difficult to reduce the overall height of the brake, or if the height is reduced, there is not enough space to place the coil, resulting in very few coil turns and very low impedance, which in turn generates a lot of heat and limits the application scenarios of the brake. Utility Model Content

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A flat permanent magnet brake includes a brake body composed of an outer flange, an armature, an inner flange, an inner magnetic pole, a permanent magnet, and a magnetic shell coaxially arranged. A pre-stretched elastic element is provided between the outer flange and the armature. The elastic element continuously pulls the armature to move towards the outer flange.

[0006] The magnetic shell is provided with a receiving groove, and a permanent magnet and a coil are arranged in the receiving groove. The diameter of the permanent magnet is larger than the diameter of the coil, and the permanent magnet is placed outside the coil.

[0007] The permanent magnet is also fixedly connected to the inner magnetic pole, and the receiving groove is also provided with an inner flange. The inner flange, the inner magnetic pole, and the permanent magnet form a closed space in the receiving groove. The closed space has at least one gap, and the coil is located in the closed space.

[0008] Furthermore, the gap is located between the inner flange and the inner magnetic pole.

[0009] Furthermore, the permanent magnets are distributed around the flange axis in the form of tiles, rings, or blocks.

[0010] Furthermore, the inner magnetic poles and the magnetic shell are made of soft magnetic material.

[0011] The beneficial effects of this utility model are:

[0012] This invention abandons the traditional design mode of stacking permanent magnets and coils, and places the permanent magnets on the outside of the coils. This does not damage the geometry of the brake, greatly reduces the thickness of the brake, and can output a large braking force. The permanent magnets and coils are coaxially arranged, and the magnetic field can be linearly adjusted by adjusting the current to counteract the magnetic field, thereby linearly adjusting the braking force, resulting in more stable performance and precise control.

[0013] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is an exploded view of the present invention.

[0015] Figure 2 This is a schematic diagram showing the state of the coil when it is energized.

[0016] Figure 3 This is a schematic diagram of the coil state when the power is off.

[0017] Figure 4 This is a schematic diagram simulating the magnetic force when the coil of this utility model is energized;

[0018] Figure 5 This is a schematic diagram simulating the magnetic force when the coil of this utility model is de-energized;

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Outer flange; 2. Armature; 3. Inner flange; 4. Inner magnetic pole; 5. Permanent magnet; 6. Magnetic shell; 7. Coil. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention. Specific implementation examples:

[0023] like Figures 1 to 5The flat permanent magnet brake shown includes a brake body composed of an outer flange 1, an armature 2, an inner flange 3, an inner magnetic pole 4, a permanent magnet 5, and a magnetic shell 6, all coaxially arranged. A pre-stretched elastic element (existing conventional technology, not shown in the figure) is provided between the outer flange 1 and the armature 2. The elastic element continuously pulls the armature 2 towards the outer flange. The magnetic shell 6 has a receiving groove, in which the permanent magnet 5 and a coil 7 are disposed. The diameter of the permanent magnet 5 is larger than the diameter of the coil 7, and the permanent magnet 5 is placed outside the coil 7. Considering magnetic conductivity, the inner magnetic pole 4 and the magnetic shell 6 are made of soft magnetic material.

[0024] The permanent magnet 5 is also fixedly connected to the inner magnetic pole 4. In this example, the permanent magnet 5 is annular. The receiving groove is also provided with an inner flange 3. The inner flange 3, the inner magnetic pole 4, and the permanent magnet 5 form a closed space in the receiving groove. The closed space has at least one gap. In this embodiment, the gap is located between the inner flange 3 and the inner magnetic pole 4. The coil 7 is located within the closed space. Specifically, the magnetism of the coil 7 is opposite to that of the magnetic field lines inside the armature.

[0025] The brake described in this embodiment has two working states, such as... Figure 2 The image shows the first state, in which the equipment operates normally. At this state, the magnetic field lines of the coil and the permanent magnet cancel each other out on the armature. (Reference) Figure 4 (Magnetic diagram simulation: the armature is blue, indicating no magnetism.) The armature is separated from the inner magnetic pole, and the flange operates normally.

[0026] The second state is the braking state, such as Figure 3 As shown, the coil is de-energized at this time, and the permanent magnet attracts the armature (reference). Figure 5 Magnetic field simulation (green at the armature, indicating strong magnetic force), flange braking.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A flat permanent magnet brake, comprising a brake body coaxially arranged with an outer flange (1), an armature (2), an inner flange (3), an inner magnetic pole (4), a permanent magnet (5), and a magnetic shell (6), characterized in that... A pre-stretched elastic element is provided between the outer flange (1) and the armature (2), and the elastic element continuously pulls the armature (2) to move towards the outer flange. The magnetic shell (6) is provided with a receiving groove, and a permanent magnet (5) and a coil (7) are provided in the receiving groove. The diameter of the permanent magnet (5) is larger than the diameter of the coil (7), and the permanent magnet (5) is placed outside the coil (7). The permanent magnet (5) is also fixedly connected to the inner magnetic pole (4), and the receiving groove is also provided with an inner flange (3). The inner flange (3), the inner magnetic pole (4), and the permanent magnet (5) form a closed space in the receiving groove. The closed space has at least one gap, and the coil (7) is located in the closed space.

2. A flat permanent magnet brake according to claim 1, characterized in that: The gap is located between the inner flange (3) and the inner magnetic pole (4).

3. A flat permanent magnet brake according to claim 1, characterized in that: The permanent magnet (5) is distributed around the flange axis in the form of tiles, rings or blocks.

4. A flat permanent magnet brake according to claim 1, characterized in that: The inner magnetic pole (4) and the magnetic shell (6) are made of soft magnetic material.

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