Permanent magnet brake with elasticity convenient to adjust

Abstract

The utility model relates to the technical field of permanent magnet brakes, in particular to a permanent magnet brake convenient to adjust elasticity, which comprises a stator, a coil, magnetic steel, an armature and a mounting flange, the coil is embedded in the stator, and the armature and the mounting flange are arranged on the side of the stator; a plurality of mounting counter bores are formed in the end face of one side of the armature, cylindrical spring pieces are placed in the mounting counter bores, connecting screws are connected between the cylindrical spring pieces and the mounting flange in series, and the cylindrical spring pieces are pressed in the mounting counter bores through the heads of the connecting screws. And the mounting flange and the armature form an integrated rotor structure through the connecting screw. According to the utility model, the armature and the stator have uniform elastic force brake contact, and the elastic force direction of the spring is prevented from deviating.

Description

Technical Field

[0001] This utility model relates to the field of permanent magnet brake technology, and more specifically, to a permanent magnet brake with easily adjustable elastic force. Background Technology

[0002] Currently, in the equipment manufacturing industry, due to the inertia of equipment during operation, braking control is necessary. Brakes, as a commonly used actuator, can decelerate or stop mechanical moving parts, thereby achieving control. Among them, permanent magnet brakes utilize the magnetic force generated by a permanent magnet to attract an armature through an electromagnetic coil, overcoming the spring force and driving the main shaft to rotate, thus cutting off the transmission chain or changing the transmission direction. They feature fast response and no impact vibration.

[0003] Existing permanent magnet brakes all use leaf spring structures for elastic support. The deformation of the leaf spring and the elastic force have a curvilinear relationship. It is difficult to ensure the uniformity of the elastic force support on the armature, and it is inconvenient to adjust. This results in poor contact and fit between the armature and the stator braking surface during braking. In addition, the leaf spring structure may be subjected to shear force when in action. The shear force will act directly on the armature, causing the elastic force of the leaf spring to deviate. Utility Model Content

[0004] The purpose of this invention is to provide a permanent magnet brake that is easy to adjust, so that the armature and the stator have uniform elastic braking contact, and prevent the spring force direction from deviating.

[0005] This utility model is achieved through the following technical solution: a permanent magnet brake with adjustable elastic force, comprising a stator, a coil, a magnet, an armature, and a mounting flange. The coil is embedded in the stator, and the armature and the mounting flange are located on the side of the stator. A plurality of mounting countersunk holes are opened on one end face of the armature, and a cylindrical spring is placed in the mounting countersunk hole. A connecting screw is connected in series between the cylindrical spring and the mounting flange. The head of the connecting screw presses the cylindrical spring into the mounting countersunk hole, and the mounting flange and the armature form an integrated rotor structure through the connecting screw.

[0006] Furthermore, the cylindrical spring has anti-rotation rings at both ends, and the connecting screw can pass through the anti-rotation rings and the cylindrical spring in sequence.

[0007] Furthermore, the wall of the mounting countersunk hole is provided with at least one guide groove, and the outer edge of the anti-rotation retaining ring is provided with a plug for engaging the guide groove.

[0008] Furthermore, the mounting flange has a limiting boss in the middle, and the armature has a slot on the side facing the mounting flange that corresponds to and matches the limiting boss.

[0009] Furthermore, the stator includes a sleeve and a slotted plate, the sleeve is inserted through the center hole of the slotted plate, the magnet is disposed at the front end of the coil, and the magnet is engaged between the sleeve and the slotted plate.

[0010] Furthermore, the plurality of mounting countersunk holes are evenly spaced around the center of the armature.

[0011] Furthermore, a buffer pad is provided between the armature and the mounting flange.

[0012] Furthermore, the buffer pad has an annular structure and is embedded in the gap between the armature and the outer edge of the mounting flange.

[0013] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0014] 1. By setting a cylindrical spring component and a connecting screw to cooperate, the elastic force is directly proportional to the amount of compression of the cylindrical spring component by the connecting screw. Moreover, the connecting screw is more convenient to adjust and can also prevent the cylindrical spring component from being subjected to shear force, which would cause the elastic force direction to deviate.

[0015] 2. A buffer pad was added between the armature and the mounting flange to reduce the reset impact noise between the armature and the mounting flange. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of the permanent magnet brake with adjustable elastic force in this utility model;

[0017] Figure 2 for Figure 1 A magnified view of point A in the image;

[0018] Figure 3 This is a schematic diagram of the front structure of the armature in this utility model;

[0019] Figure 4 This is a schematic diagram of the back structure of the armature in this utility model;

[0020] Figure 5 This is a front structural diagram of the mounting flange in this utility model.

[0021] Reference numerals: 1-Stator, 11-Insertion sleeve, 12-Slotted plate, 2-Coil, 3-Magnet, 4-Armature, 41-Mounting countersunk hole, 411-Guide slot, 42-Slot, 5-Mounting flange, 51-Limiting boss, 6-Columnar spring, 7-Anti-rotation retaining ring, 71-Insertion rod, 8-Connecting screw, 9-Buffer pad. Detailed Implementation

[0022] The following description, in conjunction with specific embodiments, provides further details. Figures 1-5 As shown, this embodiment is a permanent magnet brake that is easy to adjust the elastic force, including a stator 1, a coil 2, a magnet 3, an armature 4, and a mounting flange 5. The coil 2 is embedded in the stator 1, and the armature 4 and the mounting flange 5 are located on the side of the stator 1. Several mounting countersunk holes 41 are opened on one end face of the armature 4. A cylindrical spring 6 is placed in the mounting countersunk hole 41. A connecting screw 8 is connected in series between the cylindrical spring 6 and the mounting flange 5. The head of the connecting screw 8 presses the cylindrical spring 6 into the mounting countersunk hole 41. The mounting flange 5 and the armature 4 form an integrated rotor structure through the connecting screw 8. Specifically, the force of the cylindrical spring 6 is proportional to the amount of compression. This invention provides multiple mounting countersunk holes 41 on the armature 4 and inserts the cylindrical spring 6 into these holes. When the coil 2 is de-energized, the magnet 3 attracts the armature 4 to come closer for contact braking, compressing the cylindrical spring 6 and causing friction between the armature 4 and one end face of the stator 1. When the coil 2 is energized, the magnetic field lines of the coil 2 cancel each other out with the magnetic field lines of the magnet 3, causing the cylindrical spring 6 to extend and return to its original position. The cylindrical spring 6 pulls the armature 4 back, separating the armature 4 from the stator 1. The connecting screw 8 can be used to adjust and control the compression of the cylindrical spring 6, making it less likely for the armature 4 to jam when it is pulled back to its original position. At the same time, it also enables the connecting mounting flange 5 to rotate synchronously with the armature 4. The connecting screw 8 can also withstand the shearing force that the cylindrical spring 6 may experience, improving the service life of the armature 4. In summary, the cooperation between the multi-point cylindrical spring 6 and the connecting screw 8 ensures the uniformity of the elastic support of the armature 4 and improves the contact fit between the armature 4 and the braking surface of the stator 1.

[0023] like Figure 2 As shown, in some embodiments, the cylindrical spring 6 has anti-rotation retaining rings 7 at both ends, and the connecting screw 8 can pass through the anti-rotation retaining rings 7 and the cylindrical spring 6 in sequence. Specifically, in order to prevent the connecting screw 8 from rotating itself during the process of pressing the cylindrical spring 6, which may cause the cylindrical spring 6 to twist along with it and affect its performance, the anti-rotation retaining rings 7 are used to separate the head of the connecting screw 8 from the cylindrical spring 6. The anti-rotation retaining rings 7 can be fixedly connected to the cylindrical spring 6.

[0024] It should be noted that the head of the connecting screw 8 must be fully recessed into the mounting countersunk hole 41 to avoid protruding from the end face of the armature 4.

[0025] like Figure 2 and Figure 3 As shown, in this embodiment, the wall of the mounting countersunk hole 41 is provided with at least one guide groove 411, and the outer edge of the anti-rotation retaining ring 7 is provided with a plug rod 71 for engaging the guide groove 411. Specifically, when the anti-rotation retaining ring 7 is installed into the mounting countersunk hole 41, the plug rod 71 will engage in the guide groove 411. The guide groove 411 is arranged along the axial direction of the mounting countersunk hole 41. When the cylindrical spring member 6 is compressed and elongated, the plug rod 71 will reciprocate along a straight line in the guide groove 411.

[0026] To prevent the armature 4 from being subjected to radial shear force, a limiting boss 51 is provided in the middle of the mounting flange 5. The side of the armature 4 facing the mounting flange 5 is provided with a slot 42 that corresponds to and matches the limiting boss 51. The cooperation between the limiting boss 51 and the slot 42 plays a certain guiding role, and the armature 4 only makes a small displacement in the axial direction.

[0027] like Figure 1 As shown, in this embodiment, the stator 1 includes a sleeve 11 and a slotted plate 12. The sleeve 11 is inserted through the center hole of the slotted plate 12, and the magnet 3 is located at the front end of the coil 2. The magnet 3 is held between the sleeve 11 and the slotted plate 12. Specifically, the coil 2 is installed inside the slotted plate 12, and the inner ring of the coil 2 is fitted onto the sleeve 11. One end of the sleeve 11 has a skirt ring. When the sleeve 11 is gradually connected to the slotted plate 12, the magnet 3 is inserted into the gap between the skirt ring and the bottom of the slotted plate 12.

[0028] In order to adjust the uniformity of the elastic force of the cylindrical spring 6, multiple mounting countersunk holes 41 are evenly distributed around the center of the armature 4.

[0029] like Figure 1 As shown, in this embodiment, a buffer pad 9 separates the armature 4 from the mounting flange 5; specifically, in order to avoid the armature 4 retracting and causing a large impact noise with the mounting flange 5, a buffer pad 9 is provided between the two.

[0030] More specifically, the buffer pad 9 has a ring structure and is embedded in the gap between the armature 4 and the mounting flange 5.

[0031] 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 permanent magnet brake with adjustable elastic force, comprising a stator (1), a coil (2), a magnet (3), an armature (4), and a mounting flange (5), wherein the coil (2) is embedded in the stator (1), characterized in that: The armature (4) and the mounting flange (5) are located on the side of the stator (1); The armature (4) has several mounting countersunk holes (41) on one side end face. A cylindrical spring (6) is placed in the mounting countersunk hole (41). A connecting screw (8) is connected between the cylindrical spring (6) and the mounting flange (5). The head of the connecting screw (8) presses the cylindrical spring (6) into the mounting countersunk hole (41). The mounting flange (5) and the armature (4) are integrated into a rotor structure by means of the connecting screw (8).

2. The permanent magnet brake with adjustable elastic force according to claim 1, characterized in that: The cylindrical spring (6) has anti-rotation retaining rings (7) at both ends, and the connecting screw (8) can pass through the anti-rotation retaining rings (7) and the cylindrical spring (6) in sequence.

3. The permanent magnet brake with adjustable elastic force according to claim 2, characterized in that: The mounting countersunk hole (41) has at least one guide groove (411) on its wall, and the outer edge of the anti-rotation ring (7) has a plug (71) for engaging the guide groove (411).

4. The permanent magnet brake with adjustable elastic force according to claim 1, characterized in that: The mounting flange (5) has a limiting boss (51) in the middle, and the armature (4) has a slot (42) on the side facing the mounting flange (5) that is compatible with the limiting boss (51).

5. The permanent magnet brake with adjustable elastic force according to claim 1, characterized in that: The stator (1) includes a sleeve (11) and a slotted plate (12). The sleeve (11) is inserted through the center hole of the slotted plate (12). The magnet (3) is located at the front end of the coil (2). The magnet (3) is held between the insert (11) and the slotted plate (12).

6. The permanent magnet brake with adjustable elastic force according to claim 1, characterized in that: Multiple mounting countersunk holes (41) are evenly spaced around the center of the armature (4).

7. The permanent magnet brake with adjustable elastic force according to claim 1, characterized in that: A buffer pad (9) separates the armature (4) from the mounting flange (5).

8. The permanent magnet brake with adjustable elastic force according to claim 7, characterized in that: The buffer pad (9) has a ring structure and is embedded in the gap between the armature (4) and the mounting flange (5).

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