A compact electromagnetic brake

Abstract

The utility model relates to brake technology field provides a compact electromagnetic brake, including the stator, movable plate, rotor and flange that arrange successively, the fixed connection between flange and stator, one end of stator is equipped with recess, movable plate, rotor and flange all are in recess inside, and the target distance is left to flange outside and recess top edge. The utility model makes stator whole bowl -shaped structure, movable plate, rotor and flange all are in bowl, and flange distance bowl mouth also has target distance, cannot exceed bowl mouth or with bowl mouth level, in this way, for the compact occasion of electromagnetic brake installation between two parts, the pressure (or tension) between two parts only acts on stator, avoids flange stress and destroys brake structure stability and internal clearance precision, and then avoids thus influence brake service life.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, and more specifically, to a compact electromagnetic brake. Background Technology

[0002] Electromagnetic brakes, as a type of brake, are widely used in various industries. The basic principle of commonly used electromagnetic brakes is as follows: In the de-energized state, the moving plate presses against the rotor under the action of the spring, thereby achieving braking; when energized, the magnetic yoke attracts the moving plate, causing the moving plate to separate from the rotor, thereby releasing the brake.

[0003] Conventional electromagnetic brakes (such as those disclosed in patents "CN217633580U" and "CN220227608U") are installed as follows: the moving plate and rotor are positioned between the stator and the flange. During braking, the rotor is held between the moving plate and the flange, forming a double-sided braking effect to achieve greater braking torque. The flange and stator are fixed together by screws or bolts. However, in some compact installation applications (such as robot joint modules), where the electromagnetic brake is installed between two parts and the two parts are tightened by bolts, the flange is subjected to strong pressure (or tension). This can compromise the structural stability and internal clearance accuracy of the brake, affecting its service life. Utility Model Content

[0004] The purpose of this invention is to provide a compact electromagnetic brake to overcome the aforementioned deficiencies of the prior art.

[0005] This utility model is achieved through the following technical solution:

[0006] A compact electromagnetic brake includes a stator, a moving plate, a rotor, and a flange arranged in sequence. The flange is fixedly connected to the stator. One end of the stator is provided with a groove. The moving plate, rotor, and flange are all located inside the groove, and a target distance is left between the outer side of the flange and the top edge of the groove.

[0007] Optionally, the target distance is 3-5 mm.

[0008] Optionally, an installation step is provided on the inner side of the bottom surface of the groove, and a friction ring is installed at the installation step.

[0009] Optionally, the mounting step is connected with a plurality of positioning pins, and the friction ring is provided with a plurality of positioning pin holes that cooperate with the positioning pins.

[0010] Optionally, friction plates are provided on both sides of the rotor.

[0011] Optionally, the flange is connected to the stator by screws arranged axially.

[0012] Optionally, the screw is fitted with a positioning sleeve to limit the distance between the bottom of the groove and the flange.

[0013] Optionally, the stator, the moving plate, and the flange are provided with through holes at corresponding positions.

[0014] Optionally, both ends of the stator are provided with sealing ring grooves for installing sealing rings.

[0015] The technical solution of this utility model has at least the following advantages and beneficial effects: In this utility model, a groove is provided at one end of the stator, and the moving plate, rotor and flange are all located inside the groove. The outer side of the flange and the top edge of the groove are left with a target distance. In layman's terms, the stator is a bowl-shaped structure, and the moving plate, rotor and flange are all located inside the bowl. The flange is also at a target distance from the bowl opening, and cannot exceed the bowl opening or be flush with the bowl opening. In this way, in compact situations where the electromagnetic brake is installed between two parts, the pressure (or tension) between the two parts only acts on the stator, avoiding the flange from being stressed and damaging the stability of the brake structure and the accuracy of the internal clearance, thereby avoiding affecting the service life of the brake. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a compact electromagnetic brake provided in Embodiment 1;

[0017] Figure 2 for Figure 1 AA section view in the middle;

[0018] Figure 3 This is a cross-sectional view of a compact electromagnetic brake provided in Embodiment 2;

[0019] Figure 4 for Figure 3 Enlarged view of point B in the image;

[0020] Reference numerals: 1-Stator, 101-Magnetic yoke, 1011-Groove, 102-Coil, 2-Moving plate, 3-Rotor, 4-Flange, 401-Mounting through hole, 5-Axial screw, 6-Positioning sleeve, 7-Friction ring, 8-Friction plate, 9-Positioning pin. Detailed Implementation

[0021] Example 1

[0022] refer to Figure 1 and Figure 2 A compact electromagnetic brake includes a stator 1, a moving plate 2, a rotor 3, and a flange 4 arranged in sequence. Those skilled in the art will understand that the stator 1 consists of a magnetic yoke 101 and a coil 102, with the coil 102 installed inside the magnetic yoke 101. Unless otherwise specified, the following description of the stator 1 refers to the magnetic yoke 101.

[0023] One end of the stator 1 has a groove 1011. The moving plate 2, rotor 3, and flange 4 are all located inside the groove 1011, and the outer side of the flange 4 is at a target distance from the top edge of the groove 1011. In simple terms, the stator 1 has a bowl-shaped structure, with the moving plate 2, rotor 3, and flange 4 all located inside the bowl. The flange 4 is at a target distance from the rim of the bowl and cannot exceed or be flush with the rim. In this way, in compact applications where the electromagnetic brake is installed between two parts, the pressure (or tension) between the two parts only acts on the stator 1, preventing the flange 4 from being stressed and thus compromising the stability of the brake structure and the accuracy of the internal clearance, thereby avoiding affecting the service life of the brake.

[0024] Furthermore, since the moving plate 2, rotor 3, and flange 4 are all located inside the groove 1011, a closed environment can be formed inside after installation, which facilitates the improvement of the brake's dustproof and waterproof rating. Alternatively, in this embodiment, sealing ring grooves are provided at both ends of the stator 1. These sealing ring grooves are used to install sealing rings (not shown in the figure) to improve sealing performance.

[0025] As an alternative, the target distance between the outer side of flange 4 and the top edge of groove 1011 is 3-5mm, and 3mm, 4mm or 5mm can be selected. In other embodiments, other values ​​can of course be selected.

[0026] The flange 4 is fixedly connected to the stator 1. Alternatively, the flange 4 and stator 1 are connected by screws arranged axially. A positioning sleeve 6 is fitted onto the screw, with one end of the positioning sleeve 6 abutting against the stator 1 and the other end abutting against the flange 4. This limits the distance between the bottom of the groove 1011 and the flange 4, eliminating the need for manual adjustment of the braking clearance. Furthermore, those skilled in the art will understand that the moving plate 2 should have a hole or notch through which the positioning sleeve 6 passes, facilitating radial positioning of the moving plate 2, while the positioning sleeve 6 serves as a guide for the movement of the moving plate 2. In other embodiments, the flange 4 and stator 1 can, of course, be fixed in other ways, such as by radial screw connection.

[0027] The stator 1, moving plate 2, and flange 4 are provided with through holes 401 at corresponding positions. Since the brake is installed between the two parts, the through holes 401 facilitate the passage of bolts connecting the two parts. In practical applications, multiple through holes 401 can be designed. For example, in this embodiment, six through holes 401 are designed (in other embodiments, other numbers can of course be designed).

[0028] Example 2

[0029] refer to Figure 3 and Figure 4This embodiment is a further optimization based on embodiment 1. In this embodiment, an installation step is provided on the inner side of the bottom surface of the groove 1011, and a friction ring 7 is installed at the installation step. It is worth noting that once the material of the magnetic yoke 101 is selected, the coefficient of friction is fixed, and it is difficult to increase its friction. The designed friction ring 7 makes it easy to increase friction by using other friction materials, thereby increasing the braking torque.

[0030] As an alternative, in this embodiment, the mounting step is connected with several positioning pins 9, and the friction ring 7 is provided with several positioning pin holes that mate with the positioning pins 9. It is worth noting that with this arrangement, the friction ring 7 is placed directly at the mounting step, and its circumferential rotation is restricted by the positioning pins 9, which facilitates quick assembly and disassembly of the friction ring 7 and makes it easier for later maintenance. In other embodiments, the friction ring 7 can of course be fixed in other ways, such as by bonding.

[0031] In this embodiment, friction plates 8 are provided on both sides of the rotor 3, and the friction plates 8 are fixed by adhesive bonding. In other embodiments, other fixing methods can of course be used, such as using the installation method of friction ring 7 when the thickness is sufficient.

[0032] 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 compact electromagnetic brake, comprising a stator, a moving plate, a rotor, and a flange arranged sequentially, wherein the flange is fixedly connected to the stator, characterized in that, One end of the stator is provided with a groove, and the moving plate, rotor and flange are all located inside the groove, with a target distance between the outer side of the flange and the top edge of the groove.

2. The compact electromagnetic brake according to claim 1, characterized in that, The target distance is 3-5mm.

3. The compact electromagnetic brake according to claim 1, characterized in that, The groove has an installation step on its inner side, and a friction ring is installed at the installation step.

4. The compact electromagnetic brake according to claim 3, characterized in that, The mounting step is connected to a number of positioning pins, and the friction ring is provided with a number of positioning pin holes that cooperate with the positioning pins.

5. The compact electromagnetic brake according to claim 1, characterized in that, Friction plates are provided on both sides of the rotor.

6. The compact electromagnetic brake according to any one of claims 1-5, characterized in that, The flange is connected to the stator by screws arranged axially.

7. The compact electromagnetic brake according to claim 6, characterized in that, The screw is fitted with a positioning sleeve to limit the distance between the bottom of the groove and the flange.

8. The compact electromagnetic brake according to any one of claims 1-5, characterized in that, The stator, the moving plate, and the flange are provided with through holes at corresponding positions.

9. The compact electromagnetic brake according to any one of claims 1-5, characterized in that, Both ends of the stator are provided with sealing ring grooves for installing sealing rings.

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