A riveted permanent magnet brake

Abstract

The application provides a riveting type permanent magnet brake, which comprises an armature, the side of the armature is provided with a magnetic yoke and an iron core in parallel, the magnetic yoke and the iron core are fixed by riveting through rivet points, and a coil and a magnetic steel are arranged between the magnetic yoke and the iron core; the magnetic steel is arranged at the end close to the armature, the magnetic circuit is closed in a very short distance, the magnetic circuit of the magnetic force line of the magnetic steel is greatly shortened, and the magnetic resistance is reduced; the magnetic yoke and the iron core are riveted by a multi-point riveting process, the screw head does not need to be given a space, the wall thickness of the suction cup can be greatly reduced, the middle hole of the armature is enlarged, the rotational inertia of the armature is reduced, the performance of the brake is improved, and full automatic production is very easy to realize, beneficial effects of small size, large suction force, small heating power, large middle hole, low rotational inertia are achieved, and the brake is particularly suitable for general servo motors and humanoid robot joint servo motors.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of permanent magnet brake, in particular to a riveting type permanent magnet brake. BACKGROUND

[0002] The existing permanent magnet chuck is designed with circular ring-shaped magnetic steel placed at the bottom of the magnetic yoke, the magnetic yoke, the magnetic steel and the iron core are fixed by bolts, the magnetic force lines of the magnetic steel pass through the iron core, the armature and the surface of the magnetic yoke to close the magnetic circuit, the long magnetic circuit leads to large magnetic resistance and extremely low magnetic line transmission efficiency, resulting in large volume of the chuck, small suction force, large heating power, and the design of thin-walled large and medium hole type brake cannot be realized, and it is also difficult to realize full automatic production, and the rotational inertia of the armature is very large, and the brake performance is low.

[0003] Therefore, there is an urgent need for a riveting type permanent magnet brake to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a riveting type permanent magnet brake to solve the problems existing in the prior art.

[0005] To achieve the above purpose, the present application provides the following solutions:

[0006] The present application provides a riveting type permanent magnet brake, comprising an armature, the side of the armature is provided with a magnetic yoke and an iron core in parallel, the magnetic yoke and the iron core are fixed by riveting points, and a coil and a magnetic steel are arranged between the magnetic yoke and the iron core.

[0007] Preferably, the cross section of the magnetic yoke is ┏-shaped structure, the cross section of the iron core is ┛-shaped structure, the riveting points and the magnetic steel are respectively located at the joint positions of the magnetic yoke and the iron core, and the magnetic steel is arranged close to the armature.

[0008] Preferably, the cross section of the magnetic yoke is ┏-shaped structure, the cross section of the iron core is ┛-shaped structure, the riveting points and the magnetic steel are respectively located at the joint positions of the magnetic yoke and the iron core, and the magnetic steel is arranged close to the armature.

[0009] Preferably, the cross section of the magnetic yoke is ┏-shaped structure, the cross section of the iron core is ┛-shaped structure, the riveting points and the magnetic steel are respectively located at the joint positions of the magnetic yoke and the iron core, and the magnetic steel is arranged close to the armature.

[0010] Preferably, the cross section of the magnetic yoke is ┏-shaped structure, the cross section of the iron core is ┛-shaped structure, the riveting points and the magnetic steel are respectively located at the joint positions of the magnetic yoke and the iron core, and the magnetic steel is arranged close to the armature.

[0011] Preferably, the cross section of the magnetic yoke is a ┏ structure, the cross section of the core is a ┓ structure, the rivet point is located at the joint of the magnetic yoke and the core, and the magnetic steel is arranged at the side of the rivet point.

[0012] Preferably, a magnetic isolation pad is arranged at the rivet point.

[0013] The present application has the following beneficial technical effects relative to the prior art:

[0014] The riveted permanent magnet brake provided by the present application comprises an armature, characterized in that: side portions of the armature are provided with a magnetic yoke and a core in parallel, the magnetic yoke and the core are fixed by riveting through a rivet point, and a coil and a magnetic steel are arranged between the magnetic yoke and the core; the magnetic steel is arranged near the armature end, the magnetic circuit is closed in a very short distance, the magnetic path of the magnetic steel magnetic line is greatly shortened, and the magnetic resistance is reduced; the magnetic yoke and the core are riveted by a multi-point riveting process, no space is needed for the screw head, the wall thickness of the suction cup can be greatly reduced, the central hole of the armature is enlarged to reduce the rotational inertia of the armature, the performance of the brake is improved, and full automatic production is very easy to realize, the beneficial effects of small size, large suction force, small heating power, large central hole, and low rotational inertia are achieved, and the present application is particularly suitable for general servo motors and humanoid robot joint servo motors. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 FIG. 1 is a structure schematic diagram of a riveted permanent magnet brake according to Embodiment 1 of the present application;

[0017] Figure 2 FIG. 2 is a structure schematic diagram of a riveted permanent magnet brake according to Embodiment 2 of the present application;

[0018] Figure 3 FIG. 3 is a structure schematic diagram of a riveted permanent magnet brake according to Embodiment 3 of the present application;

[0019] Figure 4 FIG. 4 is a structure schematic diagram of a riveted permanent magnet brake according to Embodiment 4 of the present application;

[0020] Figure 5 FIG. 5 is a structure schematic diagram of a riveted permanent magnet brake according to Embodiment 5 of the present application;

[0021] In the figure: 1: magnetic yoke, 2: coil, 3: iron core, 4: magnetic steel, 5: armature, 6: rivet point, 7: magnetic isolation pad. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] The present application aims to provide a riveted permanent magnet brake to solve the problems in the prior art.

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0025] Embodiment 1

[0026] The present embodiment provides a riveted permanent magnet brake, as shown in Figure 1 , comprising an armature 5, the side of the armature 5 is equipped with a magnetic yoke 1 and an iron core 3 in parallel, the cross section of the magnetic yoke 1 is a ┏-shaped structure, the cross section of the iron core 3 is a ┛-shaped structure, both of which form a surrounding structure, a coil 2 is located in the surrounding structure, the magnetic yoke 1 and the iron core 3 are fixed by riveting through a rivet point 6, a magnetic isolation pad 7 is arranged at the rivet point 6, the rivet point 6 is located at the lower left corner of the structure shown in Figure 1 , a multi-point riveting process of the magnetic yoke 1 and the iron core 3 is adopted, no space is needed for the screw head, the wall thickness of the suction cup can be greatly reduced, a magnetic steel 4 is located at the upper right corner of the structure shown in Figure 1 , and is arranged close to the magnetic yoke 1, the iron core 3 and the armature 5, so that the magnetic circuit can be closed in a very short distance, the magnetic circuit of the magnetic force line of the magnetic steel is greatly shortened, and the magnetic resistance is reduced, the middle hole of the armature can be enlarged due to the optimization of the structure, thereby reducing the moment of inertia of the armature 5, improving the performance of the brake, and achieving the beneficial effects of small size, large suction force, small heating power, large middle hole, low moment of inertia, and is particularly suitable for general servo motors and humanoid robot joint servo motors.

[0027] Embodiment 2

[0028] As a variant structure of embodiment 1, the present embodiment changes the shapes and positional relationships of the magnetic yoke 1, the iron core 3 and the magnetic steel 4, please refer to Figure 2 , the cross section of the magnetic yoke 1 is a ┏-shaped structure, the cross section of the iron core 3 is a ┛-shaped structure, the rivet point 6 is located at the lower right corner of the structure shown in Figure 2 , and the magnetic steel 4 is located at the upper left corner of the structure shown in Figure 2The upper right corner of the structure shown, the structure can also achieve the same effect of example 1.

[0029] Example 3:

[0030] As a variant structure of example 1, the shape and position relationship of the magnetic yoke 1, the core 3 and the magnetic steel 4 are changed, please refer to Figure 3 , the cross section of the magnetic yoke 1 is┏ shape structure, the cross section of the core 3 is┏ shape structure, the rivet point 6 is located Figure 3 The lower left corner of the structure shown, the magnetic steel 4 is located Figure 3 The right side of the structure shown, close to the armature 5, the structure can also achieve the same effect of example 1.

[0031] Example 4:

[0032] As a variant structure of example 1, the shape and position relationship of the magnetic yoke 1, the core 3 and the magnetic steel 4 are changed, please refer to Figure 4 , the cross section of the magnetic yoke 1 is┏ shape structure, the cross section of the core 3 is┏ shape structure, the rivet point 6 is located Figure 4 The upper left corner of the structure shown, the magnetic steel 4 is located Figure 4 The upper right corner of the structure shown, the structure can also achieve the same effect of example 1.

[0033] Example 5:

[0034] As a variant structure of example 1, the shape and position relationship of the magnetic yoke 1, the core 3 and the magnetic steel 4 are changed, please refer to Figure 5 , the cross section of the magnetic yoke 1 is┏ shape structure, the cross section of the core 3 is┏ shape structure, the rivet point 6 is located Figure 5 The lower left corner of the structure shown, the magnetic steel 4 is located Figure 5 The left side of the structure shown, close to the rivet point 6, the structure can also achieve the same effect of example 1.

[0035] The principle and implementation mode of the application are described by specific examples, and the above example is only used to help understand the method and core idea of the application; at the same time, for those skilled in the art, according to the idea of the application, the specific implementation mode and application range will be changed. In summary, the content of the specification should not be understood as a limitation of the application.

Claims

1. A riveted permanent magnet brake, comprising an armature (5), characterized in that: The armature (5) has a magnetic yoke (1) and an iron core (3) arranged side by side. The magnetic yoke (1) and the iron core (3) are riveted together by a rivet (6). A coil (2) and a magnet (4) are provided between the magnetic yoke (1) and the iron core (3). The magnetic yoke (1) and the iron core (3) are connected by a multi-point riveting process, which does not require the screw head to make room, and is used to reduce the wall thickness of the suction cup. The central hole of the armature (5) is enlarged to reduce the rotational inertia of the armature (5). The cross-section of the magnetic yoke (1) is a ┏-shaped structure, the cross-section of the iron core (3) is a ┛-shaped structure, the rivet point (6) and the magnet (4) are respectively located at the junction of the magnetic yoke (1) and the iron core (3), and the magnet (4) is set close to the armature (5); Alternatively, the cross-section of the magnetic yoke (1) is a U-shaped structure, the cross-section of the iron core (3) is a I-shaped structure, and the rivet point (6) and the magnet (4) are located at the junction of the magnetic yoke (1) and the iron core (3), respectively. Alternatively, the cross-section of the magnetic yoke (1) is a ┏-shaped structure, the cross-section of the iron core (3) is a mono-shaped structure, the rivet point (6) and the magnet (4) are respectively located at the junction of the magnetic yoke (1) and the iron core (3), and the magnet (4) is set close to the armature (5); Alternatively, the cross-section of the magnetic yoke (1) is a rectangular structure, the cross-section of the iron core (3) is a U-shaped structure, the rivet (6) and the magnet (4) are respectively located at the junction of the magnetic yoke (1) and the iron core (3), and the magnet (4) is set close to the armature (5); Alternatively, the cross-section of the magnetic yoke (1) is a ┏-shaped structure, the cross-section of the iron core (3) is a U-shaped structure, the rivet point (6) is located at the junction of the magnetic yoke (1) and the iron core (3), and the magnet (4) is disposed on the side of the rivet point (6).

2. The riveted permanent magnet brake according to claim 1, characterized in that: A magnetic shielding pad (7) is provided at the rivet point (6).

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