Noiseless low cost electromagnetic brake

Abstract

The application belongs to the technical field of electromagnetic brakes, and particularly relates to a noiseless low-cost electromagnetic brake, which comprises a magnetic yoke, an electromagnetic coil, an armature, a plurality of springs, a plurality of shaft shoulder screws and a rotor; the magnetic yoke, the electromagnetic coil, the armature, the springs and the shaft shoulder screws are assembled to form a fixed end, and the rotor is a rotating end; the shaft shoulder screws penetrate through the armature and are fixedly connected with the magnetic yoke, and the springs are arranged between the magnetic yoke and the armature. The application greatly simplifies the component composition of the conventional electromagnetic brake, omits redundant components such as a cover plate, a brake disc, an O-ring and a steel sleeve in the conventional structure, directly reduces the procurement, processing and assembly costs of components, and realizes the core invention purpose of "low cost".

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic brake technology, and particularly relates to a noiseless, low-cost electromagnetic brake. Background Technology

[0002] In industrial production, electromagnetic drive brakes have become key components of the aforementioned heavy equipment due to their advantages such as rapid response and convenient control. However, existing electromagnetic brakes still suffer from many technical defects that urgently need to be addressed in practical applications, seriously affecting equipment operational stability, operating costs, and environmental friendliness. These defects are specifically manifested as follows: Firstly, the problem of operating noise is prominent. In existing electromagnetic brakes, the rotor is generally connected to the motor shaft via a bushing. After energization, the electromagnetic coil generates an attractive force that draws the armature to the yoke end. At this point, the rotor is freed from the pressure constraints of the armature and the cover plate and enters a free-rotating state. Because the rotor lacks a reliable axial limiting and contact isolation structure, friction and collision with the armature or cover plate are inevitable during rotation, generating significant operating noise. This not only disrupts the stability of the equipment's operation but also causes noise pollution to the working environment.

[0003] Secondly, the noise reduction solutions have inherent flaws. To alleviate noise problems, the industry commonly adopts a "cocktail" design, which involves adding a plastic component at the internal and external spline joint between the rotor and the motor shaft. However, while this design can reduce friction noise to some extent, it leads to a significant decrease in spline meshing accuracy and introduces a new problem of unstable and increased frictional torque. It is difficult to balance braking performance and operational stability, resulting in poor practical application effects.

[0004] In addition, existing electromagnetic brakes have a large number of components. For example, in traditional structures, components such as cover plates, brake discs, O-rings, and steel sleeves need to be set separately. This not only increases the difficulty of assembly and manufacturing costs, but may also further aggravate noise and wear problems due to misfitting errors between components.

[0005] In summary, existing electromagnetic brakes suffer from multiple defects, such as high operating noise, insufficient braking stability, and high manufacturing costs, making it difficult to meet the comprehensive requirements of industrial equipment for low noise, low cost, and high reliability. Therefore, developing a structurally optimized, reliable, noiseless, and low-cost electromagnetic brake has significant practical significance and application value. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned technical problems by providing a noiseless, low-cost electromagnetic brake.

[0007] In view of this, the present invention provides a noiseless and low-cost electromagnetic brake, comprising a magnetic yoke, an electromagnetic coil, an armature, several springs, several shoulder screws, and a rotor; The magnetic yoke, electromagnetic coil, armature, spring, and shoulder screw are assembled to form a fixed end, and the rotor is a rotating end; The shoulder screw passes through the armature and is fixedly connected to the yoke; the spring is located between the yoke and the armature. The rotor is fixedly mounted on the motor shaft; When the rotor is powered on, the electromagnetic coil generates an electromagnetic force to attract the armature, so that the rotor does not come into contact with any of the components at the fixed end. In the power-off braking state, the spring releases its elastic force to push the armature toward the rotor, and the rotor and armature directly rub against each other to perform braking.

[0008] Furthermore, the shoulder screw can be in any of the following forms: a) Single shoulder screw; b) A combination of bushing and screw; c) A combination of a cylindrical pin and a screw.

[0009] Furthermore, the spring is sleeved on the outside of the shoulder screw, with one end of the spring abutting against the groove of the magnetic yoke and the other end abutting against the end face of the armature, so as to provide the armature with a continuous elastic preload towards the rotor.

[0010] Furthermore, the magnetic yoke has an annular coil mounting groove inside, the electromagnetic coil is embedded in the coil mounting groove and fixedly connected to the magnetic yoke, and the electromagnetic force generated by the electromagnetic coil when energized is greater than the elastic preload of the spring.

[0011] Furthermore, the armature is provided with guide holes that correspond one-to-one with the shoulder screws. The shoulder screws are clearance-fitted with the guide holes to guide the armature to reciprocate along the axial direction of the shoulder screws.

[0012] The beneficial effects of this invention are: This invention significantly simplifies the component composition of traditional electromagnetic brakes, eliminating redundant parts such as cover plates, brake discs, O-rings, and steel sleeves in the traditional structure, directly reducing the cost of component procurement, processing, and assembly, and achieving the core invention objective of "low cost". When powered on, the rotor does not contact any of the components at the fixed end, thus eliminating the noise caused by friction between the components during operation. This completely solves the noise problem caused by friction between the rotor and the armature or cover plate in the free state of traditional electromagnetic brakes, achieving "noise-free" operation and improving the stability of equipment operation. When power is off, the rotor directly rubs against the armature to brake, simplifying the braking transmission link, reducing energy loss, and improving braking response speed. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of a noiseless, low-cost electromagnetic brake proposed in this invention; Figure 2 This is a top view of the brake of a noiseless, low-cost electromagnetic brake proposed in this invention; Figure 3 This is a top view of the rotor of a noiseless, low-cost electromagnetic brake proposed in this invention; The markings in the diagram are as follows: 1. Magnetic yoke; 2. Electromagnetic coil; 3. Armature; 4. Spring; 5. Shoulder screw; 6. Rotor; 7. Guide hole. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0015] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0016] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0017] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0018] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0019] Reference Figures 1 to 3 A noiseless, low-cost electromagnetic brake includes a magnetic yoke 1, an electromagnetic coil 2, an armature 3, several springs 4, several shoulder screws 5, and a rotor 6. The magnetic yoke 1, electromagnetic coil 2, armature 3, spring 4 and shoulder screw 5 are assembled to form a fixed end, and the rotor 6 is a rotating end; The shoulder screw 5 passes through the armature 3 and is fixedly connected to the magnetic yoke 1; the spring 4 is located between the magnetic yoke 1 and the armature 3. The rotor 6 is fixedly mounted on the motor shaft, and the motor shaft passes through the fixed end formed by the magnetic yoke 1, electromagnetic coil 2, armature 3, spring 4 and shaft shoulder screw 5. When the electromagnetic coil 2 is powered on, it generates an electromagnetic force to attract the armature 3, so that the rotor 6 does not come into contact with any of the components at the fixed end. In the power-off braking state, the spring 4 releases elastic force to push the armature 3 toward the rotor 6, and the rotor 6 directly rubs against the armature 3 to perform braking.

[0020] This application significantly simplifies the component composition of traditional electromagnetic brakes, eliminating redundant parts such as cover plates, brake discs, O-rings, and steel sleeves in the traditional structure, directly reducing the cost of component procurement, processing, and assembly, and achieving the core invention objective of "low cost". When powered on, the rotor 6 does not contact any of the components at the fixed end, thus eliminating the noise caused by friction between components during operation. This completely solves the noise problem caused by friction between the rotor 6 and the armature 3 or the cover plate in the free state of the traditional electromagnetic brake, achieving "noise-free" operation and improving the stability of equipment operation. When power is off, the rotor 6 directly rubs against the armature 3 for braking, which simplifies the braking transmission link, reduces energy loss, and improves braking response speed.

[0021] In the examples of this application, the shoulder screw 5 has any of the following structures: a) 5 single-shoulder screws; b) A combination of bushing and screw; c) A combination of a cylindrical pin and a screw.

[0022] As a preferred example of the present invention, the three optional structural forms of the above-mentioned shoulder screw 5 can be adapted to the installation space, load-bearing requirements and processing cost budget of different application scenarios: a single shoulder screw 5 is suitable for conventional working conditions, with the simplest structure and lowest cost; the combination of bushing and screw can improve connection strength and wear resistance, and is suitable for heavy-duty working conditions; the combination of cylindrical pin and screw is easy to disassemble and maintain, and is suitable for scenarios that require frequent maintenance.

[0023] In the example of this application, the spring 4 is sleeved on the outside of the shoulder screw 5, and one end of the spring 4 abuts against the groove of the magnetic yoke 1, and the other end abuts against the end face of the armature 3, so as to provide the armature 3 with a continuous elastic preload toward the rotor 6.

[0024] As a preferred example of the present invention, the spring 4 is sleeved on the outside of the shoulder screw 5, with its two ends abutting against the groove of the magnetic yoke 1 and the end face of the armature 3, respectively. This allows the elastic preload of the spring 4 to act precisely on the armature 3 along the axial direction of the shoulder screw 5, avoiding uneven distribution of preload caused by spring 4 offset. This ensures that the armature 3 can move smoothly and quickly toward the rotor 6 along the axial direction when the power is off, improving the timeliness and consistency of the braking response. The installation method of the spring 4 sleeve makes full use of the space position of the shoulder screw 5, eliminating the need for an additional spring 4 positioning structure. This makes the internal structure of the fixed end more compact, reducing the overall space occupied by the brake and adapting to more installation scenarios. The groove of the magnetic yoke 1 provides limiting protection for one end of the spring 4, preventing the spring 4 from radially moving or deforming during compression / rebound, thus extending the service life of the spring 4. The continuous elastic preload ensures stable contact pressure between the armature 3 and the rotor 6 when the power is off, guaranteeing the consistency of the braking torque and improving braking reliability.

[0025] In the example of this application, the magnetic yoke 1 has an annular coil mounting groove inside, the electromagnetic coil 2 is embedded in the coil mounting groove and fixedly connected to the magnetic yoke 1, and the electromagnetic force generated by the electromagnetic coil 2 when energized is greater than the elastic preload of the spring 4.

[0026] As a preferred example of the present invention, the annular coil mounting groove inside the magnetic yoke 1 provides a stable mounting reference for the electromagnetic coil 2, ensuring that the electromagnetic coil 2 is firmly fixed after being embedded, avoiding electromagnetic force fluctuations caused by coil loosening or displacement during operation, and ensuring the reliability of braking / release actions; the annular structure design ensures that the electromagnetic force generated by the electromagnetic coil 2 after being energized is evenly distributed along the circumference, balancing the force when adsorbing the armature 3, preventing the armature 3 from tilting or getting stuck, ensuring the armature 3 moves smoothly, and further eliminating the risk of noise or braking failure caused by component jamming; the electromagnetic force is greater than the elastic preload of the spring 4, ensuring that the preload can be reliably overcome to adsorb the armature 3 when energized, so that the rotor 6 is completely separated from the armature 3 without contact friction, ensuring the core effect of "noiseless" operation; at the same time, the fixed connection method between the coil and the magnetic yoke 1 simplifies the assembly process, reduces the difficulty of coil alignment during production, and improves assembly efficiency.

[0027] In the example of this application, the armature 3 is provided with guide holes 7 corresponding to the shoulder screws 5. The shoulder screws 5 are clearance-fitted with the guide holes 7 to guide the armature 3 to reciprocate along the axial direction of the shoulder screws 5.

[0028] As a preferred example of the present invention, the clearance fit between the guide hole 7 of the armature 3 and the shoulder screw 5 provides precise axial guidance for the armature 3, restricts the radial displacement of the armature 3, and prevents the armature 3 from deflecting or wobbling during movement. This ensures that the armature 3 can be smoothly attracted to the end of the yoke 1 when energized and can accurately fit against the braking surface of the rotor 6 when de-energized, eliminating local friction noise or uneven contact of the braking surface caused by the offset of the armature 3. The clearance fit reduces the movement resistance between the armature 3 and the shoulder screw 5, making the reciprocating movement of the armature 3 under the action of electromagnetic force and spring 4 force smoother, improving the action response speed when switching between energization and de-energization, and shortening the lag time of braking or release. The guide structure ensures that the braking surfaces of the armature 3 and the rotor 6 always remain parallel and fitted, ensuring a uniform contact area during braking, stabilizing the braking torque, avoiding the braking torque fluctuation caused by the offset of the armature 3 in the traditional structure, and improving the stability and repeatability of the braking effect.

[0029] To further improve the sufficiency of the disclosed technical solution and ensure that this application can be clearly understood and smoothly implemented, in terms of material selection, the magnetic yoke 1 is made of low-cost low-carbon steel or cast iron, taking into account both magnetic conductivity and ease of processing, thereby reducing material costs; the armature 3 is made of low-carbon steel to ensure good magnetic conductivity and ensure electromagnetic adsorption effect, and its braking surface in contact with the rotor 6 can be treated with quenching or spray welding wear-resistant layer to improve friction braking life; the rotor 6 is made of 45 steel, and its friction surface that mates with the armature 3 is polished to ensure uniform friction and resistance to wear during braking; the spring 4 is made of stainless steel to take into account both elastic stability and corrosion resistance, avoiding elastic decay after long-term use; the shoulder screw 5 is made of high-strength carbon steel screw to ensure connection strength, and if it is a bushing and screw assembly, the bushing is made of copper to improve wear resistance, and the cylindrical pin in the cylindrical pin and screw assembly is made of 40Cr material.

[0030] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A noiseless, low-cost electromagnetic brake, characterized in that, It includes a magnetic yoke (1), an electromagnetic coil (2), an armature (3), several springs (4), several shoulder screws (5), and a rotor (6); The magnetic yoke (1), electromagnetic coil (2), armature (3), spring (4) and shoulder screw (5) are assembled to form a fixed end, and the rotor (6) is a rotating end; The shoulder screw (5) passes through the armature (3) and is fixedly connected to the yoke (1), and the spring (4) is located between the yoke (1) and the armature (3); The rotor (6) is fixedly mounted on the motor shaft; When the electromagnetic coil (2) is powered on, it generates an electromagnetic force to attract the armature (3), so that the rotor (6) does not come into contact with any of the components at the fixed end. In the power-off braking state, the spring (4) releases elastic force to push the armature (3) toward the rotor (6), and the rotor (6) and the armature (3) directly rub against each other to perform braking.

2. The noiseless, low-cost electromagnetic brake according to claim 1, characterized in that, The shoulder screw (5) has any of the following structures: a) Single shoulder screw; b) A combination of bushing and screw; c) A combination of a cylindrical pin and a screw.

3. The noiseless, low-cost electromagnetic brake according to claim 2, characterized in that, The spring (4) is sleeved on the outside of the shoulder screw (5), and one end of the spring (4) abuts against the groove of the magnetic yoke (1), and the other end abuts against the end face of the armature (3) to provide the armature (3) with a continuous elastic preload toward the rotor (6).

4. The noiseless, low-cost electromagnetic brake according to claim 3, characterized in that, The magnetic yoke (1) has an annular coil mounting groove inside. The electromagnetic coil (2) is embedded in the coil mounting groove and fixedly connected to the magnetic yoke (1). The electromagnetic force generated by the electromagnetic coil (2) when energized is greater than the elastic preload of the spring (4).

5. A noiseless, low-cost electromagnetic brake according to claim 4, characterized in that, The armature (3) has guide holes (7) that correspond one-to-one with the shoulder screws (5). The shoulder screws (5) and the guide holes (7) are fitted with a clearance to guide the armature (3) to reciprocate along the axial direction of the shoulder screws (5).

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