Thin permanent magnet brake

Abstract

The utility model discloses a kind of thin permanent magnet brake, including by flange, armature, inner magnetic pole, permanent magnet, magnetic shell coaxial setting composition brake body, the flange is equipped with pre-stretching elastic element between armature, the elastic element continuously pulls armature and moves to flange direction;Permanent magnet and coil are equipped with magnetic shell, the coil diameter is greater than permanent magnet diameter, the permanent magnet is placed inside coil;The permanent magnet is also fixedly connected inner magnetic pole, the inner magnetic pole, permanent magnet, magnetic shell form accommodating groove, the coil is equipped in accommodating groove, the inner magnetic pole and magnetic shell are equipped with at least one gap. The utility model does not destroy the appearance size of brake geometric body, can greatly compress brake thickness, output brake force is big, and performance is more stable.

Description

Technical Field

[0001] This utility model belongs to the field of brake technology, specifically relating to a thin 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 thin permanent magnet brake includes a brake body composed of a flange, an armature, an inner magnetic pole, a permanent magnet, and a magnetic shell coaxially arranged, characterized in that: a pre-stretched elastic element is provided between the flange and the armature, and the elastic element continuously pulls the armature to move towards the flange;

[0006] The permanent magnet and the coil are housed inside a magnetic shell, the diameter of the coil is larger than the diameter of the permanent magnet, and the permanent magnet is placed inside the coil;

[0007] The permanent magnet is also fixedly connected to the inner magnetic pole. The inner magnetic pole, the permanent magnet, and the magnetic shell form a receiving groove. The coil is provided in the receiving groove. The inner magnetic pole and the magnetic shell are provided with at least one gap.

[0008] Furthermore, the gap is located on the side of the magnetic shell away from the coil.

[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] Furthermore, the elastic element is a leaf spring.

[0012] The beneficial effects of this utility model are:

[0013] This invention abandons the traditional design mode of stacking permanent magnets and coils, and places the permanent magnet inside the coil. This does not damage the external dimensions of the brake geometry, can greatly reduce the thickness of the brake, and can output a large braking force. The permanent magnet and the coil are set coaxially, and the magnetic field can be adjusted by adjusting the current to adjust the reverse magnetic field, thereby adjusting the braking force. The performance is more stable and the control is more precise.

[0014] 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

[0015] Figure 1 This is an exploded view of the present invention.

[0016] Figure 2 This is a schematic diagram showing the state of the coil when it is energized.

[0017] Figure 3 This is a schematic diagram of the coil state when the power is off.

[0018] Figure 4 This is a schematic diagram simulating the magnetic force when the coil of this utility model is energized;

[0019] Figure 5 This is a schematic diagram simulating the magnetic force when the coil of this utility model is de-energized;

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Flange; 2. Armature; 3. Inner magnetic pole; 4. Permanent magnet; 5. Magnetic shell; 6. Elastic element; 7. Coil. Detailed Implementation

[0022] 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:

[0024] like Figures 1 to 5 The thin permanent magnet brake shown includes a brake body coaxially arranged with a flange 1, an armature 2, an inner magnetic pole 3, a permanent magnet 4, and a magnetic shell 5. A pre-stretched elastic element 6 is provided between the flange 1 and the armature 2, and the elastic element continuously pulls the armature 2 towards the flange 1. Of course, the inner magnetic pole 3 and the magnetic shell 5 are made of soft magnetic material. In this embodiment, considering the thickness, the elastic element 6 is preferably a leaf spring.

[0025] The permanent magnet 4 and the coil 7 are housed within the magnetic shell 5. The diameter of the coil 7 is larger than the diameter of the permanent magnet 4, and the permanent magnet 4 is placed inside the coil 7. In this embodiment, the permanent magnet 4 is annular. The magnetism of the coil 7 is opposite to that of the permanent magnet 4.

[0026] The permanent magnet 4 is also fixedly connected to the inner magnetic pole 3. The inner magnetic pole 3, the permanent magnet 4, and the magnetic shell 5 form a receiving groove. The coil 7 is provided in the receiving groove, and the inner magnetic pole 3 and the magnetic shell 5 have at least one gap. Specifically, the gap is located on the side of the magnetic shell 5 away from the coil 7.

[0027] 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.

[0028] 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.

[0029] 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 thin permanent magnet brake, comprising a brake body coaxially arranged with a flange (1), an armature (2), an inner magnetic pole (3), a permanent magnet (4), and a magnetic shell (5), characterized in that... A pre-stretched elastic element (6) is provided between the flange (1) and the armature (2), and the elastic element continuously pulls the armature (2) to move towards the flange (1); The permanent magnet (4) and the coil (7) are housed inside a magnetic shell (5). The diameter of the coil (7) is larger than the diameter of the permanent magnet (4). The permanent magnet (4) is placed inside the coil (7). The permanent magnet (4) is also fixedly connected to the inner magnetic pole (3). The inner magnetic pole (3), the permanent magnet (4), and the magnetic shell (5) form a receiving groove. The coil (7) is provided in the receiving groove. The inner magnetic pole (3) and the magnetic shell (5) are provided with at least one gap.

2. A thin permanent magnet brake according to claim 1, characterized in that: The gap is located on the side of the magnetic shell (5) away from the coil (7).

3. A thin permanent magnet brake according to claim 1, characterized in that: The permanent magnet (4) is distributed around the flange axis in the form of tiles, rings or blocks.

4. A thin permanent magnet brake according to claim 1, characterized in that: The inner magnetic pole (3) and the magnetic shell (5) are made of soft magnetic material.

5. A thin permanent magnet brake according to claim 1, characterized in that: The elastic element (6) is a leaf spring.

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